2025 Proffered Presentations

 

 

(S001) THE ROLE OF RESECTING THE MEDIAL WALL OF THE CAVERNOUS SINUS WALL IN OPTIMIZING HORMONAL OUTCOMES FUNCTIONING PITUITARY ADENOMAS
Prakash Nair, MCh, Neurosurgery; Ashutosh Carpenter; Akhilesh Gowda, MCh, Neurosurgery; Sanjay HM; Antony Stanley; Easwer HV; Jayanand Sudhir B; Sree Chitra Tirunal Institute for Medical science and Technology, Trivandrum, Kerala, India

(S002) PATTERNS OF INVASION OF PITUITARY ADENOMAS INTO THE MEDIAL WALL AND CAVERNOUS SINUS COMPARTMENTS
Felipe Constanzo, MD¹; Jonathan Rychen, MD²; Thomas Johnstone²; Christine K Lee, MD, PhD²; Vladimir Ljubimov, MD²; Yuanzhi Xu, MD²; Vera Vigo, MD²; Alix Bex, MD²; Enrico Gambatesa, MD²; Juan Carlos Fernandez Miranda, MD²; ¹Clinica Bio Bio; ²Stanford University

(S003) PROGNOSTIC SIGNIFICANCE OF P53 IMMUNOPOSITIVITY IN A LARGE COHORT OF PITUITARY ADENOMA PATIENTS RECEIVING TRANSSPHENOIDAL SURGERY
Kaasinath Balagurunath, BA; Christopher S Hong, MD; Jakob V Gerstl, MD; Ryan Chrenek, MD; Sean Lyne, MD; Noah L Nawabi, BS; Timothy R Smith, MD, PhD; Brigham and Women's Hospital

(S004) BMI, TUMOR SIZE, AND HORMONE PROFILES: KEY DIFFERENCES OF INFRASELLAR VS. SUPRASELLAR PITUITARY TUMOR EXTENSION
David Gomez, BS; Ishan Shah, BS; Kevin G Liu, BS; Apurva Prasad, BA; William Zeng, BS; Timothy Dawson II, BS; David J Cote, MD, PhD; Robert G Briggs, MD; Gabriel Zada, MD, MS; Department of Neurological Surgery, Keck School of Medicine of USC

(S005) IDENTIFICATION OF PITUITARY ADENOMAS WITH SUBARACHNOID INVASION: INTRODUCTION AND VALIDATION OF THE NET SCORE
Jonathan B Lamano, MD, PhD¹; Christine K Lee, MD, PhD²; Ana Sofia Alvarez, MD¹; Karam P Asmaro, MD³; Enrico Gambatesa, MD¹; Felipe Constanzo, MD¹; Adrian J Rodrigues, MD¹; Juan Carlos Fernandez-Miranda, MD¹; ¹Stanford University; ²Brown University; ³Henry Ford Health

(S006) TRANSCRIPTION FACTOR CELL LINEAGE DETERMINES AGGRESSIVE GROWTH PATTERNS AMONG NONFUNCTIONAL PITUITARY ADENOMAS
Alexander S Himstead, MD; Gianna M Fote, MD, PhD; Nischal Acharya, BS; William H Yong, MD; Mari Perez-Rosendahl, MD; Edward C Kuan, MD; Aaron B Simon, MD, PhD; Frank P Hsu, MD, PhD; Ahmed Mohyeldin, MD, PhD; University of California, Irvine

(S007) DEVELOPMENT OF A MAGNETIC RESONANCE GRADING SYSTEM TO PREDICT CAVERNOUS SINUS COMPARTMENTAL INVASION OF PITUITARY ADENOMAS.
Felipe Constanzo, MD¹; Jonathan Rychen, MD²; Thomas Johnstone²; Yuanzhi Xu, MD²; Christine K Lee, MD, PhD²; Vladimir Ljubimov, MD²; Vera Vigo, MD²; Enrico Gambatesa, MD²; Alix Bex, MD²; Juan Carlos Fernandez-Miranda, MD²; ¹Clinica Bio Bio; ²Stanford University

(S009) NOVEL CLINICAL PATHWAY FOR DIAGNOSIS AND TREATMENT OF PAPILLARY CRANIOPHARYNGIOMAS
Amy J Wang; Lucas Martinez; Pamela Jones; Massachusetts General Hospital

 

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(S010) MACHINE LEARNING WITH RADIOMICS TO PREDICT WHO PATHOLOGIC GRADE OF MENINGIOMAS FROM PREOPERATIVE MRI: A MULTICENTER STUDY
Syed M Adil, MD; Pranav I Warman, BSE; Kaizar Rangwala; Andreas Seas, BS; Tanner J Zachem, BSE; Jihad Abdelgadir, MD, MSc; Evan Calabrese, MD, PhD; Patrick J Codd, MD; Anoop Patel, MD; Ali Zomorodi, MD; Duke University

(S012) PREVALENCE OF VENOUS SINUS STENOSIS IN SPONTANEOUS CEREBROSPINAL FLUID LEAK AND THE ROLE FOR VENOUS SINUS STENTING: A SYSTEMATIC REVIEW AND META-ANALYSIS
Jenny B Xiao¹; Carlos Khalil, MD²; Helen Hsiao¹; Janiss Skulsampaopol, MD²; Daniel J Lee, MD, FRCSC²; Michael Cusimano, MD, FRCSC, DABNS, FACS, PhD, MHPE²; John M Lee, MD, MSc, FRCSC²; ¹University of British Columbia; ²Department of Otolaryngology - Head and Neck Surgery, University of Toronto

(S013) A FULLY IMMERSIVE, OPEN-SOURCE VIRTUAL SURGICAL SIMULATOR FOR SKULL BASE SURGERY
Andy S Ding, MD, MSE¹; Nimesh V Nagururu, MSE¹; George S Liu, MD¹; Oren Wei, BS¹; Adnan Munawar, PhD²; Manish Sahu, PhD²; Russell H Taylor, PhD²; Francis X Creighton, MD¹; ¹Johns Hopkins University School of Medicine; ²Johns Hopkins University Whiting School of Engineering

(S014) UNDIAGNOSED CRANIAL NEUROPATHIES AND THE ROLE OF ENDOSCOPIC PTERYGOPALATINE FOSSA DISSECTION FOR TISSUE DIAGNOSIS
Matthew J Kabalan, MD; Pablo F Recinos, MD; Varun Kshettry, MD; Raj Sindwani, MD; Cleveland Clinic Foundation

(S015) LATERAL TRAP DOOR OSTEOTOMY : KEY TO ACCESSING CAVERNOUS SINUS MENINGIOMA VIA TRANSORBITAL ENDOCSOPIC ROUTE
A Sheikh, MBBS, BSc, FRCSSN; J Robins, M; J Parmar, MBBS, FRCS, OMFS; Leeds General Infirmary

(S017) TEMPORALIS MUSCLE FASCIA FREE GRAFT IN RECONSTRUCTION FOLLOWING RESECTION OF MALIGNANT CRANIAL BASE TUMORS
Martin Jurlina, PhD; Clinical Hospital Dubrava, Zagreb, Croatia

 

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(S018) PREDICTORS OF BIOCHEMICAL REMISSION AFTER TRANSSPHENOIDAL SURGERY IN A LARGE COHORT OF ACROMEGALY PATIENTS
Kaasinath P Balagurunath, BA¹; Christopher S Hong, MD¹; Jakob V Gerstl, MBBS¹; Ryan Chreneck, MD¹; Sean Lyne, MD¹; Noah L Nawabi, BS¹; Rania A Mekary, PhD²; Timothy R Smith, MD, PhD¹; ¹Brigham and Women's Hospital; ²School of Pharmacy, Massachusetts College of Pharmacy and Health Sciences (MCPHS) University

(S019) CLINICAL CHARACTERISTICS AND POSTOPERATIVE OUTCOMES IN A LARGE COHORT OF PATIENTS WITH ACTH COSTAINING SOMATOTROPH TUMORS
Ryan Chrenek, MD¹; Kaasinath P Balagurunath, BA¹; Christopher S Hong, MD¹; Jakob V Gerstl, MBBS¹; Sean Lyne, MD¹; Noah L Nawabi, BS¹; Rania A Mekary, PhD²; Timothy R Smith, MD, PhD¹; ¹Brigham and Women's Hospital; ²School of Pharmacy, Massachusetts College of Pharmacy and Health Sciences (MCPHS) University

(S020) A MULTI-CENTER COMPARISON OF CRH VS. DDAVP STIMULATION RESPONSES IN INFERIOR PETROSAL SINUS SAMPLING FOR CUSHING'S DISEASE
Michael Karsy¹; Julie Silverstein²; Albert Kim²; James Evans³; Sarah Collopy³; Robert Rennert⁴; William Couldwell⁴; Garni Barkhoudarian⁵; Dan Kelly⁵; Juan Fernandez-Miranda⁶; Donato Pacione⁷; Won Kim⁸; Marvin Bergsneider⁸; Michael Chicoine⁹; Gabriel Zada¹⁰; Varun Kshettry¹¹; Kyle Wu¹²; Carolina Benjamin¹³; Jamie Van Gompel¹⁴; Michael Catalino¹⁵; Adam Mamelak¹⁶; Nathan Zwagerman¹⁷; Andrew Little¹⁸; Kevin Yuen¹⁸; Ildiko ITorok¹⁸; Paul Gardner¹⁹; ¹Drexel University College of Medicine; ²Washington University School of Medicine; ³Jefferson University; ⁴University of Utah; ⁵Pacific Neuroscience Institute; ⁶Stanford University; ⁷New York University; ⁸University of California, Los Angeles; ⁹University of Missouri, Columbia; ¹⁰Keck School of Medicine, University of Southern California; ¹¹Cleveland Clinic Foundation; ¹²Ohio State College of Medicine, Ohio State University; ¹³Miller School of Medicine, University of Miami; ¹⁴Mayo Clinic; ¹⁵University of Virginia; ¹⁶Cedars-Sinai Medical Center; ¹⁷Medical College of Wisconsin; ¹⁸Barrow Neurological Institute; ¹⁹University of Pittsburgh Medical Center

(S021) PHOTON-COUNTING DETECTOR CT OUTPERFORMS MRI IN LOCALIZING CUSHING'S DISEASE: AN INSTITUTIONAL COHORT STUDY
Giorgos Michalopoulos, MD; Ian T Mark, MD, MSM; Yuki Shinya, MD, PhD; Sandhya Palit, MBBS; Carlos D Pihneiro-Neto, MD, PhD; Irina Bancos, MD, MS; Maria Peris-Celda, MD, PhD; Dana Erickson, MD; Jamie J Van Gompel, MD; Mayo Clinic

(S022) MACHINE LEARNING-BASED MODEL TO PREDICT LONG-TERM TUMOR CONTROL AND ADDITIONAL INTERVENTIONS FOLLOWING TRANSSPHENOIDAL SURGERY FOR ACROMEGALY PATIENTS
Yuki Shinya, MD, PhD¹; Abdul Karim Ghaith, MD¹; Justine S Herndon, PAC²; Sandhya R Palit, MBBS¹; Sukwoo Hong, MD¹; Miguel Saez-Alegre, MD, PhD¹; Ramin A Morshed, MD¹; Dana Erickson, MD²; Irina Bancos, MD²; Caroline J Davidge-Pitts, MD²; Janalee K Stokken, MD³; Fredric B Meyer, MD¹; John L Atkinson, MD¹; Jamie J Van Gompel, MD¹; ¹Department of Neurologic Surgery, Mayo Clinic; ²Division of Endocrinology, Diabetes, and Nutrition, Mayo Clinic; ³Department of Otolaryngology-Head and Neck Surgery, Mayo Clinic

(S023) DEVELOPMENT OF A NOVEL CLINICAL SCREENING SYSTEM FOR CUSHING'S DISEASE IN THE UNITED STATES
Jorge E Salcedo-Sifuentes¹; Carter M Suryadevara²; Andrew S Little³; Paul Gardner⁴; Julie M Silverstein⁵; Albert H Kim⁶; James J Evans⁷; Garni Barkhoudarian⁸; Juan C Fernandez-Miranda⁹; William T Couldwell¹⁰; Robert Rennert¹⁰; Varun R Kshettry¹¹; Kyle Wu¹²; Carolina Benjamin¹³; Gabriel Zada¹⁴; Michael R Chicoine¹⁵; Jamie Van Gompel¹⁶; Michael HS. Catalino¹⁷; Kevin CJ Yuen²; Michael Karsy¹⁸; Adam Mamelak¹⁹; Won Kim¹; Donato R Pacione²; Nidhi Agrawal²⁰; ¹Department of Neurosurgery, University of California, Los Angeles, Los Angeles, California; ²Department of Neurosurgery, New York University, New York, New York; ³Department of Neurological Surgery, Barrow Neurological Institute, St. Joseph's Hospital and Medical Center, Phoenix, Arizona; ⁴Department of Neurosurgery, University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania; ⁵Division of Endocrinology, Metabolism and Lipid Research, Washington University School of Medicine, St. Louis, Missouri; ⁶Department of Neurosurgery, Washington University School of Medicine, St. Louis, Missouri; ⁷Department of Neurosurgery, Jefferson University, Philadelphia, Pennsylvania; ⁸Department of Neurosurgery, Pacific Neuroscience Institute, Providence St. Johns Medical Center, Santa Monica, California; ⁹Department of Neurosurgery, Stanford University, Palo Alto, California; ¹⁰Department of Neurosurgery, University of Utah, Salt Lake City, Utah; ¹¹Department of Neurosurgery, Cleveland Clinic Foundation, Cleveland, Ohio; ¹²Department of Neurological Surgery, Ohio State College of Medicine, Ohio State University, Columbus Ohio; ¹³Department of Neurological Surgery, Miller School of Medicine, University of Miami, Miami, Florida; ¹⁴Department of Neurosurgery, Keck School of Medicine, University of Southern California, Los Angeles, California; ¹⁵Department of Neurosurgery, University of Missouri, Columbia, Missouri, USA; ¹⁶Department of Neurosurgery, Mayo Clinic, Rochester, Minnesota, USA; ¹⁷Departments of Neurosurgery and Medicine (Division of Endocrinology & Metabolism), University of Virginia, Charlottesville, USA; ¹⁸Department of Neurosurgery, Drexel University College of Medicine, Drexel University, Philadelphia, Pennsylvania; ¹⁹Department of Neurosurgery, Cedars-Sinai Medical Center, Los Angeles, California; ²⁰Division of Endocrinology, Department of Medicine, New York University, New York, New York

(S024) PRESENTATION AND TRANSSPHENOIDAL SURGERY OUTCOMES AT A NEWLY ESTABLISHED CENTER OF EXCELLENCE IN PATIENTS WITH ACROMEGALY
Margaret E Allen, BS; Samon G Tavakoli, MD; Nathan T Zwagerman, MD; Stephanie K Cheok, MD; Adriana G Ioachimescu, MD, PhD; Medical College of Wisconsin

(S025) CLINICAL CHARACTERISTICS AND POSTOPERATIVE OUTCOMES IN A LARGE COHORT OF PATIENTS WITH DENSELY VERSUS SPARSELY GRANULATED SOMATOTROPH TUMORS
Kaasinath P Balagurunath, BA¹; Christopher S Hong, MD¹; Jakob V Gerstl, MBBS¹; Ryan Chrenek, MD¹; Sean Lyne, MD¹; Noah L Nawabi, BS¹; Rania A Mekary, PhD²; Timothy R Smith, MD, PhD¹; ¹Brigham and Women's Hospital; ²School of Pharmacy, Massachusetts College of Pharmacy and Health Sciences (MCPHS) University

(S026) MRI NEGATIVE CUSHING'S DISEASE: SUBTOTAL GLAND RESECTION VERSUS GROSS TOTAL RESECTION TO PRESERVE PITUITARY GLAND FUNCTION
Sandhya R Palit, MBBS; Yuki Shinya, MD, PhD; Dana Erickson, MD; Irina Bancos, MD; Justine S Henderson, PAC; Sukwoo Hong, MD; Jamie J Van Gompel, MD; Mayo Clinic

 

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(S027) PITUITARY CENTERS OF EXCELLENCE: DISPARITIES AND REGIONALIZATION OF CARE IN CALIFORNIA
Michael G Brandel, MD¹; Julia Cochrane, BS¹; Chris Reid, MD¹; Adam Deconde, MD¹; Thomas L Beaumont, MD, PhD¹; Alexander A Khalessi, MD¹; Robert C Rennert, MD²; ¹University of California, San Diego; ²University of Utah

(S028) SIMPLIFYING INFERIOR PETROSAL SINUS SAMPLING: RESULTS OF A MULTICENTER STUDY
Paul Gardner¹; Julie Silverstein²; Albert Kim²; James Evans³; Sarah Collopy³; Robert Rennert⁴; William Couldwell⁴; Garni Barkhoudarian⁵; Dan Kelly⁵; Juan Fernandez-Miranda⁶; Donato Pacione⁷; Won Kim⁸; Marvin Bergsneider⁸; Michael Chicoine⁹; Gabriel Zada¹⁰; Varun Kshettry¹¹; Kyle Wu¹²; Carolina Benjamin¹³; Jamie Van Gompel¹⁴; Michael Catalino¹⁵; Adam Mamelak¹⁶; Nathan Zwagerman¹⁷; Andrew Little¹⁸; Kevin Yuen¹⁸; Ildiko Torok¹⁸; Michael Karsy¹⁹; ¹University of Pittsburgh Medical Center; ²Washington University School of Medicin; ³Jefferson University; ⁴University of Utah; ⁵Pacific Neuroscience Institute; ⁶Stanford University; ⁷New York University; ⁸University of California, Los Angeles; ⁹University of Missouri; ¹⁰Keck School of Medicine; ¹¹Cleveland Clinic Foundation; ¹²Ohio State College of Medicine; ¹³University of Miami; ¹⁴Mayo Clinic; ¹⁵University of Virginia; ¹⁶Cedars-Sinai Medical Center; ¹⁷Medical College of Wisconsin; ¹⁸Barrow Neurological Institute, St. Joseph's Hospital and Medical Center; ¹⁹Drexel University College of Medicine

(S029) THE NON-FUNCTIONING PITUITARY ADENOMA INVENTORY (NFPAI): A PRELIMINARY DISEASE-SPECIFIC, PATIENT-CENTERED MEASURE FOR ASSESSING QUALITY OF LIFE IN NON-FUNCTIONING PITUITARY ADENOMA PATIENTS
Saket Myneni¹; Shaan Bhandarkar¹; Ali K Ahmed, MD¹; Nathan T Zwagerman, MD²; Shirley Y Su, MBBS³; Eric W Wang, MD⁴; Garret W Choby, MD⁴; Erin L McKean, MD⁵; Carl H Snyderman, MD, MBA⁴; Nicholas R Rowan, MD¹; Debraj Mukherjee, MD, MPH¹; ¹Johns Hopkins University; ²Medical College of Wisconsin; ³MD Anderson Cancer Center; ⁴University of Pittsburgh Medical Center; ⁵University of Michigan Health

(S030) UNDERSTANDING THE DISTRIBUTION OF PITUITARY ADENOMAS MANAGED BY NEUROSURGERY IN A SOCIALLY VULNERABLE POPULATION
Anne R Lally, BA; Sayak R Ghosh, BS; Isabella L Pecorari, BS; Vijay Agarwal, MD; Albert Einstein College of Medicine

(S031) THE ASSOCIATION OF NEIGHBORHOOD LEVEL SOCIOECONOMIC STATUS WITH DISCHARGE AND COMPLICATIONS FOLLOWING TRANSSPHENOIDAL PITUITARY ADENOMA RESECTION
Yifei Sun¹; Hariteja Ramapuram¹; Travis Atchley²; Kristen O Riley²; Dagoberto Estevez-Ordonez²; ¹Heersink School of Medicine, University of Alabama, Birmingham; ²Department of Neurosurgery, University of Alabama at Birmingham, Alabama

(S032) SOCIODEMOGRAPHIC FACTORS ASSOCIATED WITH READMISSION AFTER PITUITARY ADENOMA RESECTION
Anne R Lally, BA; Sayak R Ghosh, BA; Isabella L Pecorari, BS; Vijay Agarwal, MD; Albert Einstein College of Medicine

(S033) CATALOGUE AND EVOLUTION OF MINIMALLY INVASIVE APPROACHES FOR ADULT INTRACRANIAL PATHOLOGY FROM 2011-2023: DEVELOPMENT OF A DEDICATED SERVICE LINE
Max Yang, BS; Ishan Shah, BS; Alex Renn, BS; Zain Kashif, BS; Gage Guerra, BD; David Gomez, BD; David J Cote, MD, PhD; Stephanie Cheok, MD; Racheal Peterson, MD; Tyler Cardinal, MD; Robert G Briggs, MD; Gabriel Zada, MD; Department of Neurological Surgery, Keck School of Medicine of USC

(S034) ACTION CLASSIFICATION FOR ENDOSCOPIC PITUITARY ADENOMA RESECTION: A CONSENSUS BASED STUDY
Joachim Starup-Hansen, BMBS¹; Danyal Khan, MRCS¹; Adrito Das, MSci²; Joao Paulo Almeida, PhD, MD³; Anouk Borg, FRCS¹; Kevin Cleary, PhD⁴; Neil Dorward, FRCS¹; Juan C Fernandez-Miranda, MD⁵; Eduardo Torres Rodríguez, BS⁶; Recai Yilmaz, MD, PhD⁶; Peter Weir, BMBS⁷; Daniel Donoho, MD⁶; Hani J Marcus, PhD, FRCS¹; ¹National Hospital for Neurology and Neurosurgery, London, UK; ²Wellcome/EPSRC Centre for Interventional and Surgical Sciences, University College London, London, UK; ³Department of Neurological Surgery, Mayo Clinic, Jacksonville, Florida, USA.; ⁴Sheikh Zayed Institute for Pediatric Surgical Innovation, Children's National Hospital, Washington, DC 20010 USA.; ⁵Department of Neurosurgery, Stanford University, Palo Alto , California , USA.; ⁶Division of Pediatric Neurosurgery, Center for Neuroscience, Children's National Hospital, Washington, District of Columbia, USA.; ⁷Nottingham University Hospitals NHS Trust, Department of Surgery, Queen's Medical Centre

 

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(S035) INTRAOPERATIVE CULTURES IN ENDOSCOPIC ENDONASAL NEUROSURGICAL CASES SHOW PERSISTENT SURGICAL SITE COLONIZATION WITH PATHOGENIC BACTERIA AFTER PREPARATION WITHOUT POST-OPERATIVE INFECTION
Nataniel J Mandelberg, MD, PhD¹; Donato Pacione, MD¹; Michael Phillips, MD²; Seth Lieberman, MD³; John G Golfinos, MD¹; ¹New York University Grossman School of Medicine Department of Neurosurgery; ²New York University Grossman School of Medicine Department of Infectious Disease; ³New York University Grossman School of Medicine Department of Otolaryngology

(S036) POST-OPERATIVE FLUID RESTRICTION TO PREVENT DELAYED HYPONATREMIA
Shinghei Mok, MPH¹; Doriann Klaassen, MD¹; Jenie Y Hwang, MD²; Sydney L Blount, MD³; Kelley J Williams, MD¹; Brendan M Fong, MD⁴; Chongliang Luo, PhD¹; Albert H Kim, MD, PhD¹; Julie M Silverstein¹; ¹Washington University School of Medicine; ²UT San Antonio; ³University of Nebraska; ⁴Neurosurgery of St. Louis

(S037) PATIENT EXPERIENCE AND ADHERENCE TO A FLUID RESTRICTION PROTOCOL AFTER TRANSSPHENOIDAL SURGERY
Carlos Perez-Vega, MD; J. Emiliano Sanchez-Garavito, MD; Joao P Almeida, MD, PhD; Kaisorn L Chaichana, MD; Alfredo Quinones-Hinojosa, MD; Susan L Samson, MD, PhD; Mayo Clinic Florida

(S039) PITUITARY LOCALIZATION AND HISTOLOGIC CHARACTERISTIC MAPPING IN MRI-NEGATIVE CUSHING'S DISEASE: DR. EDWARD OLDFIELD'S DECADE-LONG LEGACY STUDY
Richard J Chung, BA¹; Xue Feng, PhD²; Georgios A Maragkos, MD¹; Kristine Ravina, MD³; Jonathan Yun, MD¹; Kathryn N Kearns, MD¹; John A Jane Jr., MD³; Michael P Catalino, MD, MSc¹; ¹Department of Neurosurgery, University of Virginia; ²Department of Biomedical Engineering, University of Virginia; ³Department of Neurosurgery, Carilion Clinic, Virginia Tech School of Medicine

(S040) A HIGHER TUMOR RESECTION RATE CAN INCREASE THE CHANCE OF POSTOPERATIVE ADRENAL INSUFFICIENCY RECOVERY IN NONFUNCTIONING PITUITARY ADENOMAS
Yuki Shinya, MD, PhD¹; Justine S Herndon, PAC²; Sandhya R Palit, MBBS¹; Sukwoo Hong, MD¹; Dana Erickson, MD²; Irina Bancos, MD²; Fredric B Meyer, MD¹; John L Atkinson, MD¹; Jamie J Van Gompel, MD¹; ¹Department of Neurologic Surgery, Mayo Clinic, Minnesota, USA; ²Division of Endocrinology, Diabetes, and Nutrition, Mayo Clinic, Minnesota, USA

(S041) P53 IMMUNOPOSITIVITY IS ASSOCIATED WITH FUNCTIONAL STATUS IN A LARGE COHORT OF 663 PITUITARY ADENOMA PATIENTS
Kaasinath P Balagurunath, BA¹; Christopher S Hong, MD¹; Jakob V Gerstl, MBBS¹; Ryan Chrenek, MD¹; Sean Lyne, MD¹; Noah L Nawabi, BS¹; Rania A Mekary, PhD²; Timothy R Smith, MD, PhD¹; ¹Brigham and Women's Hospital; ²School of Pharmacy, Massachusetts College of Pharmacy and Health Sciences (MCPHS) University

(S042) USE OF MACHINE-LEARNING TO PREDICT GROSS TOTAL RESECTION OF NON-FUNCTIONING PITUITARY ADENOMAS: A SINGLE INSTITUTION SERIES
Benjamin B Fixman, BS; Ishan Shah, BS; Apurva Prasad, BA; Gage A Guerra, BS; Jeffrey J Feng, MD; Robert G Briggs, MD; Gabriel Zada, MD, MS; University of Southern California

(S043) CHARACTERIZATION OF THE CORTISOL WITHDRAWAL SYNDROME AFTER SUCCESSFUL CUSHINGS DISEASE SURGERY
Adam Z Levitan, BSc¹; Jai Sethi²; Janissardhar Skulsampaopol, MD³; Jeannette Goguen, MD, MEd, FRCPC¹; Michael D Cusimano, MD, PhD, MHPE, FRCS, DABNS, FACS¹; ¹University of Toronto; ²Royal College of Surgeons Ireland; ³Mahidol University

 

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(S044) SPONTANEOUS INTRAPARENCHYMAL OTOGENIC PNEUMOCEPHALUS DUE TO TEGMEN DEFECT REPAIRED WITH DERMAL ALLOGRAFT, CALCIUM PHOSPHATE, AND AUTOLOGOUS BONE FLAP
Sarah Lawhon, MD, MPH; Moises Arriaga, MD; Cole Lewis, MD; Louisiana State University - New Orleans

(S046) ANTERIOR SKULL BASE REPAIR OF A GIANT FRONTONASAL ENCEPHALOCELE IN A BABY
Jignesh Tailor, BMBCh, PhD, FRCSC; Emma Cordes; Jonathan Ting; Indiana University School of Medicine

(S047) MICROVASCULAR FREE TISSUE TRANSFER FOR RECONSTRUCTION OF ANTERIOR SKULL BASE DEFECTS
Thomas G Townes, MD; Matheus Sewastjanow; Matthew Hanasono; Edward Chang; Shirley Su; MD Anderson Cancer Center

(S049) CSF LEAK, CE N'EST PAS CHIC! A 14-YEAR LOCAL CSF LEAK REPAIR EXPERIENCE AND NATIONAL PITUITARY DATA FOR 3013 CASES
James M Robins, FRCS; Asim J Sheikh, FRCS; Nick Phillips, PhD, FRCS; Atul K Tyagi, FRCS; Paul A Nix, MD, FRCS; Leeds General Infirmary

(S050) GRADED SKULL BASE RECONSTRUCTION AFTER ENDOSCOPIC PITUITARY SURGERY
Claudio A Callejas, MD¹; Kyle K VanKoevering, MD²; Kyle C Wu, MD²; Kathleen Kelly, MD²; Lucas P Carlstrom, MD, PhD³; Daniel M Prevedello, MD, MBA²; Ricardo L Carrau, MD, MBA²; ¹The Queen Elizabeth Hospital; ²The Ohio State University; ³Southern California Permanente Medical Group

(S051) MODIFIED NASOSEPTAL FLAP SKULL BASE RECONSTRUCTION WITH PRESERVATION OF THE ANTERIOR SEPTAL CARTILAGINOUS MUCOSAL BUTTRESS: EVOLUTION OF A SINONASAL PHYSIOLOGIC-STRUCTURAL PRESERVATION TECHNIQUE
Chester F Griffiths, MD; Daniel Kelly, MD; Viren Patel; Andrew Wong, MD; Garni Barkhoudarian, MD; Pacific Neuroscience Institute

(S052) A NOVEL "INSIDE OUT" MODIFIED ENDOSCOPIC PERI CRANIAL FLAP TECHNIQUE FOR SKULL BASE RECONSTRUCTION - A CADAVERIC MORPHOMETRIC STUDY.
Glen D Souza, MD; Peter Filip; Peter Papagiannopoulos; Pete Batra; Stephan Munich; Bobby Tajudeen; RUSH University Medical Center

 

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(S054) GENOMIC CHARACTERIZATION OF CHORDOMAS: INSIGHTS FROM A NATIONAL DATABASE
Beau Hsia, BS¹; Saif Alshaka, BS¹; Gabriel Bitar, BS¹; Farhoud Faraji, MD, PhD²; Jeeho Kim, MD³; Bastien A Valencia, MD⁴; Danielle Levy, MD⁵; Michael L Levy, MD, PhD²; John Crawford, MD⁶; Mariko Sato, MD, PhD⁶; Sean Polster, MD⁷; Vijay A Patel, MD²; ¹Creighton University School of Medicine; ²Division of Pediatric Otolaryngology, Rady Children's Hospital - San Diego; ³Naval Medical Center San Diego; ⁴Department of Otolaryngology - Head and Neck Surgery, Mayo Clinic, Jacksonville, Florida; ⁵Department of Neurosurgery, University of California San Diego, Rady Children's Hospital - San Diego; ⁶Pediatrics, University of California Irvine; ⁷Department of Neurosurgery, University of Chicago

(S055) CLINICAL OUTCOMES FOLLOWING SURGERY, RADIOTHERAPY, AND MEDICAL THERAPY FOR CLIVAL CHORDOMA
Thomas Hanks, BS; Spencer Raub, BA; Kyly Hiatt, BS; Zirun Zhao, MD; Jessica Eaton, MD; Kaity Hartl, MS, PAC; Dominic Nistal, MD; Fatima El-Ghazali, MD; Aria Jamshidi, MD; Jacob Ruzevick, MD; Samuel Emerson, MD, PhD; Manuel Ferreira, MD, PhD; University of Washington

(S056) DEVELOPMENT AND CHARACTERIZATION OF A PRIMARY PATIENT TUMOR TISSUE-DERIVED SKULL-BASE CHORDOMA ORGANOID MODEL
Xi Wang, PhD; Yusha Sun, BS; Daniel Zhang, MD, PhD; Emily Pai; MacLean P Nasrallah, MD, PhD; Christina Jackson, MD; Hongjun Song; Guo-li Ming; University of Pennsylvania

(S057) HYPOFRACTIONATED RADIOSURGERY FOR SKULL BASE, SPINAL AND SACRAL CHORDOMAS: A SYSTEMATIC REVIEW AND META-ANALYSIS
Vinay Jaikumar, MD; Jaims Lim, MD; Seth Schrader, BS; Michael Liu, BS; Hanna N Algattas, MD; Jason M Davies, MD, PhD; Kenneth V Snyder, MD, PhD; Adnan H Siddiqui, MD, PhD; Elad I Levy, MD, MBA; University at Buffalo Neurosurgery

(S058) RACIAL AND SOCIOECONOMIC DISPARITIES IN TREATMENT OUTCOMES AND SURVIVAL AMONG SKULL BASE CHORDOMA AND CHONDROSARCOMA PATIENTS: A U.S. POPULATION-BASED STUDY
Lily H Kim, MD; John Choi, MD; Jonathan B Lamano, MD, PhD; Juan C Fernandez-Miranda, MD; Stanford University

(S059) SKULL BASE CHORDOMA: AUTOMATED DETECTION AND SEGMENTATION USING RADIOMICS
Daniela Stastna¹; Richard Mannion²; Robert Macfarlane²; Rishi Sharna²; Neil Donnelly²; James Tysome²; Danieli Borsetto²; Ari Ercole¹; Jonathan Coles, Prof¹; ¹University of Cambridge; ²Skull Base unit, University of Cambridge

(S060) TECHNICAL NUANCES FOR MAXIMISING THE SUBLACERUM VERSUS SUPRALACERUM ENDOSCOPIC ENDONASAL TRANSCLIVAL APPROACH: IMPLICATIONS FOR RESECTION OF CHORDOMAS AND CHONDROSARCOMAS
Muhammad Baqai; Evangelos Drosos; Mahmoud Asad; Jahangir Sajjad; Patricio Gimenez; Warren Bennett; Kumar Abhinav; Southmead Hospital

(S061) SUCCINATE DEHYDROGENASE B EXPRESSION LOSS IN CHORDOMA: A CASE REPORT.
Kristen Marciniuk, MD, PhD; Luke Hnenny, MD; Viktor Zherebitskiy, MD; University of Saskatchewan

 

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(S062) NOVEL TARGET GENES UNDERLYING GLIOBLASTOMA RAPID PROGRESSION, INVASION, AND RESISTANCE
Mahlet Mekonnen; Anubhav Chandla; Meera Suresh; Brian Aguirre; Shir Gur; Madhuri Wadehra; Isaac Yang; UCLA

(S063) A NOVEL MECHANISM WITHIN THE GUT-BRAIN AXIS THAT MODULATES STEREOTACTIC RADIOSURGERY DAMAGE.
Roberto J Alcazar; Sean P Polster; University of Chicago

(S064) SHORTWAVE INFRARED ORTHOGONAL POLARIZATION IMAGING FOR LABEL-FREE NERVE VISUALIZATION: A PRELIMINARY CADAVERIC STUDY
Yuanzhi Xu¹; Zhongming Li²; Abdullah Shahid²; Vera Vigo¹; Juan Fernandez-Miranda¹; ¹Stanford Hospital; ²Cision Vision

(S065) POST-OPERATIVE COMPLICATION RISK IN IDIOPATHIC INTRACRANIAL HYPERTENSION PATIENTS TREATED WITH GLUCAGON-LIKE PEPTIDE-1 RECEPTOR AGONISTS
Preston Carey, BS; Amanda Bingaman, BS; India Shelley, BS; Roger Murayi, MD; Maxwell Pickles, BS; Fox Ryker, BS; Mindy Rabinowitz, MD; Gurston Nyquist, MD; Marc Rosen, MD; Elina Toskala, MD; David Bray, MD, MSc; James Evans, MD; Thomas Jefferson University Hospitals

(S067) EFFICACY OF VANCOMYCIN POWDER PROPHYLAXIS IN 987 CRANIAL SURGERIES FOR NON-MALIGNANT PATHOLOGIES
Wesley Shoap, MD¹; Robert Osorio, MD²; Armond Esmaili, MD³; Phil Theodosopulos, MD²; Shawn Hervey-Jumper, MD²; Ezequiel Goldschmidt, MD, PhD²; ¹LSU Department of Neurosurgery, New Orleans; ²University of California San Francisco School of Medicine Department of Neurosurgery; ³University of California San Francisco School of Medicine

(S068) SECONDARY PITUITARY ABSCESSES WITHIN PAPILLARY CRANIOPHARYNGIOMAS: A REPORT OF TWO CASES
Roza Balin, MS¹; Rimmer Ryan, MD²; Sacit Bulent Omay, MD, FAANS³; ¹Yale University Department of Neurosurgery; ²Yale University Department of Otolaryngology; ³Yale University Department of Neurosurgery and Otolaryngology

(S069) CONTRALATERAL MEDIAL TRANSORBITAL CORRIDOR TO THE INFRAPETROUS REGION AS A COMPLEMENT TO THE ENDOSCOPIC ENDONASAL APPROACH
Chandrima Biswas, MD¹; Moataz D Abouammo, MD¹; Jaskaran Gosal, MD²; Guilherme Mansur, MD¹; Mohammad Bilal Alsavaf, MD¹; Ludovica Pasquini, MD¹; Maithrea S Narayanan, MBBS, MMED³; Daniel M Prevedello, MD, MBA¹; Ricardo L Carrau, MD, MBA¹; ¹The Ohio State University Wexner Medical Center; ²All India Institute of Medical Sciences Jodhpur, India; ³Hospital Kuala Lumpur Jalan Pahang, Malaysia

(S070) LONG TERM OUTCOME OF CENTRAL NEUROCYTOMA: A MULTICENTER STUDY OF ELEVN TERTIARY CARE CENTERS
Balgees Ajlan, MD; Dalhousie University

 

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(S071) UTILITY OF BIORBITOFRONTAL CRANIOTOMY IN THE TRANSSPHENOIDAL ERA - A 30 YEAR SINGLE SURGEON EXPERIENCE
Joseph D Castellanos, BS¹; Shrey Patel, MS¹; Jacob J Kosarchuk, MD²; Carl Heilman, MD²; ¹Tufts University School of Medicine; ²Tufts Medical Center

(S072) EFFECTS OF INJURY LOCATION AND SKULL BASE FRACTURES ON OUTCOMES OF PENETRATING TRAUMATIC BRAIN INJURY
Alexa R Lauinger¹; Wael Hassaneen, MD, PhD²; ¹Carle Illinois College of Medicine; ²Carle Neuroscience Institute

(S073) SURGICAL MANAGEMENT OF PROLACTINOMAS
Farida Nasybullina, MD¹; Gulnar Vagapova, Professor²; Bakhtiyar Pashaev, MD³; Regina Ashimova, MD²; ¹State Autonomous Healthcare Institution "City Clinical Hospital No. 7 named after M.N.Sadykov"; ²Kazan State Medical Academy - Branch Campus of the Federal State Budgetary Educational Institution of Further Professional Education «Russian Medical Academy of Continuous Professional Education» of the Ministry of Healthcare of the Russian Federation; ³Interregoinal Clinical Diagnostic Center, Kazan

(S074) MANAGEMENT OF PENETRATING TRAUMA WITH PARANASAL SINUS INJURIES: EXPERIENCE FROM WARTIME UKRAINE
Ehsan Dowlati, MD¹; Connor Berlin, MD²; Andrii Sirko, MD, PhD³; Rocco A Armonda, MD⁴; ¹Northwell Health; ²University of Virginia; ³Center for Cerebral Neurosurgery, Mechnikov Dnipropetrovsk Regional Clinical Hospital; ⁴MedStar Georgetown University Hospital

(S075) EVALUATING THE ROLE OF ANTI-OBESITY MEDICATIONS IN MODIFYING RISKS OF VISUAL AND CSF COMPLICATIONS IN IDIOPATHIC INTRACRANIAL HYPERTENSION
Arman Saeedi, MPH; Amala Nayak; Michael McWilliams; Theodore A Schuman, MD; Virginia Commonwealth University

(S077) EXTENDED ENDONASAL TRANS-TUBERCULUM APPROACH FOR MANAGEMENT OF SUPRADIAPHRAGMATIC CRANIOPHARYNGIOMA IN PEDIATRICS, ASSESSMENT OF CLINICAL OUTCOME, RESECTION RATE, POSTOPERATIVE COMPLICATIONS WITH INTERMEDIATE TERM FOLLOW UP: A SINGLE-CENTER STUDY.
Khaled Elshazly, MD, PhD; Mohammed W. Samir, MD, PhD; Ain Shams University Hospital, Cairo, Egypt

(S078) MAXIMIZING LATERAL EXTENSION OF ENDOSCOPIC ENDONASAL APPROACHES TO THE POSTEROMEDIAL ANTERIOR CRANIAL FOSSA: AN ANATOMICAL STUDY
A. Yohan Alexander, BA¹; Sheng Chen²; Luciano CPC Leonel³; Jacob G Eide⁴; Maria Peris-Celda, MD, PhD⁵; ¹Mayo Clinic Departments of Neurologic Surgery and University of Minnesota Medical School; ²Mayo Clinic Department of Neurologic Surgery; ³Mayo Clinic Departments of Neurologic Surgery and Anatomy; ⁴Mayo Clinic Department of Otorhinolaryngology; ⁵Mayo Clinic Departments of Neurologic Surgery, Otorhinolaryngology, and Anatomy

(S079) REDUCING UNNECESSARY PREOPERATIVE BLOOD ORDERS IN ANTERIOR SKULL BASE SURGICAL PROCEDURES: EVIDENCE-BASED STRATEGIES TO OPTIMIZE PREOPERATIVE BLOOD ORDERS AND UTILIZATION
Madeline Olson, BS¹; Viren Patel, MS¹; Regin Jay Mallari, BS¹; Sofia Burgoon, BS¹; Leila Cordero²; P Chodan²; Daniel Kelly, MD¹; Garni Barkhoudarian, MD¹; Chester F Griffiths, MD¹; ¹Pacific Neuroscience Institute; ²Providence Saint Johns Health Center

 

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(S080) DEVELOPMENT OF A SINONASAL SQUAMOUS CELL CARCINOMA DATABASE TO INVESTIGATE THE IMPACT OF HUMAN PAPILLOMAVIRUS ON OUTCOMES
Edward S Sim, MD¹; Omar A Karadaghy, MD, MSCI¹; Keisha J Barrera¹; Tai S Macdonald¹; Peter M Sadow, MD, PhD²; William C Faquin, MD, PhD²; Anuraag S Parikh, MD³; Derrick T Lin, MD¹; ¹Department of Otolaryngology-Head and Neck Surgery, Massachusetts Eye and Ear, Boston, MA, USA.; ²Department of Pathology, Massachusetts General Hospital, Boston, MA, USA; ³Department of Otolaryngology-Head and Neck Surgery, Columbia University Irving Medical Center, New York, NY, USA

(S081) OUTCOMES OF SINONASAL CARCINOMAS DEFINED BY IDH2-MUTANT STATUS
Daniel W Scholfield, MD, FRCS¹; Lucas Axiotakis, MD¹; Robbie Woods, MD, FRCS²; Katherine Tai, MD¹; Alana Eagan, MPH¹; Lara Dunn, MD¹; Nancy Lee, MD¹; Ian Ganly, MD, PhD¹; Marc Cohen, MD, MPH¹; Snjezana Dogan, MD¹; ¹Memorial Sloan Kettering Cancer Center; ²Beaumont Hospital

(S082) SINONASAL INVERTED PAPILLOMA WITH CONCURRENT EXOPHYTIC AND ONCOCYTIC SUBTYPES: INCIDENCE AND CLINICAL OUTCOMES
Alexis H Kim, BA^1,2; Charles C Tong, MD^1,2; ¹Department of Otolaryngology- Head and Neck Surgery, Lenox Hill Hospital Northwell, New Hyde Park, NY; ²Zucker School of Medicine at Hofstra/Northwell, Hempstead, NY

(S083) IDENTIFICATION OF SIGNALING PATHWAYS ASSOCIATED WITH RESISTANCE TO INDUCTION CHEMOTHERAPY IN SINONASAL UNDIFFERENTIATED CARCINOMA
Yoko Takahashi, PhD¹; Frederico O Gleber-Netto, MSc, DDS, PhD¹; Diana Bell, MD²; Dianna Roberts, PhD¹; Shirley Y Su, MD¹; Ehab Y Hanna, MD¹; ¹The University of Texas MD Anderson Cancer Center; ²University of Pittsburgh

(S085) DEMOGRAPHIC TRENDS IN SINONASAL CANCER SURVIVAL - A SEER-BASED STUDY
John E Richter¹; Ross Rosen¹; Daniel Karasik¹; Rishi Katragadda²; Kenneth Rodriguez, MD¹; Sanjeet Rangarajan, MD¹; Brian D'Anza, MD¹; ¹University Hospitals Cleveland Medical Center; ²Case Western Reserve School of Medicine

(S086) IMPACT OF ORBITAL PRESERVATION VS ORBITAL EXENTERATION IN ADVANCED SINONASAL SQUAMOUS CELL CARCINOMA- SYSTEMATIC REVIEW AND META-ANALYSIS
Srivatsa Surya Vasudevan, MD, MS; MacKenzie Latour, MD; Michael Yim, MD; LSU Health Shreveport

(S087) COMPREHENSIVE GENOMIC PROFILING OF SINONASAL CARCINOMAS: IDENTIFICATION OF COMMON MUTATIONS AND POTENTIAL TARGETS FOR THERAPY
Gabriel Bitar, BS¹; Beau Hsia, BS¹; Saif Alshaka, BS¹; Mariko Sato, MD, PhD²; John Crawford, MD²; Michael L Levy, MD, PhD³; Danielle Levy, MD³; Bastien A Valencia, MD⁴; Jeeho Kim, MD⁵; Farhoud Faraji, MD, PhD⁶; Sean Polster, MD⁷; Vijay A Patel, MD⁶; ¹Creighton University; ²Pediatrics, University of California Irvine; ³Department of Neurosurgery, University of California San Diego; ⁴Department of Otolaryngology - Head and Neck Surgery, Mayo Clinic; ⁵Naval Medical Center San Diego Department of Otolaryngology; ⁶Department of Otolaryngology - Head and Neck Surgery, University of California San Diego; ⁷Department of Neurosurgery, University of Chicago

(S088) IDENTIFYING GENES THAT COULD DETERMINE PROGNOSTICATION IN SINONASAL SQUAMOUS CELL CARCINOMA
Peter Filip, MD¹; Tasher A Losenegger, MD¹; Rachel Akers, MS¹; Glen D Souza, MD¹; Jacob Scott¹; Sarah Khalife, MD²; Edward C Kuan, MD³; Pete S Batra, MD¹; Bobby A Tajudeen, MD¹; Peter Papagiannopoulos, MD¹; ¹Rush University Medical Center; ²McMaster University; ³University of California Irvine

 

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(S093) ENDOSCOPE-ASSISTED MICROSURGICAL RESECTION OF CPA EPIDERMOIDS
Henry W Schroeder, MD; Mariam A Al Mutawa, MD; Viktoria Bogaczyk, MD; Ehab El Refaee, MD; Department of Neurosurgery, University Medicine Greifswald

(S089) DIFFERENTIAL METHYLATION PROFILING REVEALS DISTINCT PATHWAYS IN NF2-SYNDROMIC AND SPORADIC VESTIBULAR SCHWANNOMAS
Yosef Ellenbogen, MD; Alex Landry, MD; Suganth Suppiah, MD, PhD, FRCSC; Gelareh Zadeh, MD, PhD, FRCSC; University of Toronto

(S090) INCIDENCE OF CEREBROSPINAL FLUID (CSF) RHINORRHEA AFTER POSTERIOR WALL DURA REPAIR OF THE INTERNAL AUDITORY CANAL WITH COLLAGEN MATRIX IN RETROSIGMOID VESTIBULAR SCHWANNOMA RESECTION
Osamu Akiyama, PhD¹; Yuzaburo Shimizu, PhD¹; Mario Suzuki, PhD¹; Ryo Miyahara¹; Takuma Kodama¹; Noritaka Komune, PhD²; Satoshi Matsuo, PhD³; Akihide Kondo, PhD¹; ¹Department of Neurosurgery, Juntendo University Faculty of Medicine, Tokyo, Japan; ²Department of Otorhinolaryngology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan.; ³Department of Neurosurgery, Fukuoka Tokushukai Hospital, Fukuoka, Japan

(S092) SELECTIVE VESTIBULAR NEURECTOMY FOR REFRACTORY MENIERE'S DISEASE: OUR EXPERIENCE WITH THE PRESIGMOID RETROLABYRINTHINE APPROACH
Fabio Greco¹; Denis Aiudi²; Maurizio Gladi²; Alessio Iacoangeli²; Claudio Tortosa¹; Francesca Bonifacio¹; Fabrizio Salvinelli¹; Maurizio Iacoangeli²; ¹Policlinico Campus Bio-Medico di Roma; ²Università Politecnica delle Marche

(S094) INCIDENTALOMA OR PROBLEM? CEREBELLOPONTINE ANGLE ARACHNOID CYSTS IN PEDIATRIC PATIENTS
Taimur Siddiqui, BSA, BBA; Shubh Desai, BS; Kaitlyn A Brooks, MD; Benjamin D Lovin, MD; Akash J Patel, MD; Guillermo Aldave, MD; Alex D Sweeney, MD; Nathan R Lindquist; Baylor College of Medicine

(S095) ANATOMICALLY-BASED STRATEGIES TO PREVENT ABDUCENS NERVE INJURIES IN THE RETROSIGMOID ROUTE: INSIGHTS FROM A CADAVERIC ANALYSIS
Fabio Torregrossa, MD¹; Amedeo Piazza, MD¹; Yuki Shinya, MD, PhD¹; Luciano Leonel, PhD¹; Steven Graepel¹; Giovanni Grasso, MD, PhD²; Giuseppe Lanzino, MD¹; Michael J. Link, MD, PhD¹; Maria Peris-Celda, MD, PhD¹; ¹Mayo Clinic, Rochester, MN (USA); ²Neurosurgical Unit, Department of Biomedicine, Neurosciences and Advanced Diagnostics (BiND), University of Palermo, Palermo, Italy

(S096) QUANTITATIVE CADAVERIC COMPARISON OF SURGICAL EXPOSURE IN COMBINED PETROSAL APPROACH V/S EXTENDED RSSO WITH STANDARD KAWASE APPROACH FOR ACCESS TO PETROCLIVAL AND VENTRAL BRAINSTEM REGIONS
Biren K Patel; Leonardo Tariciotti; Alejandra Rodas; Youssef Zohdy; J. Manuel Revuelta Barbero; Erion Jr De Andrade; Justin Maldonado; Samir Lohana; Rodrigo Uribe-Pacheco; Hanyao Sun; Roberto Soriano; Tomas Garzon-Muvdi; C.Arturo Solares; Gustavo Pradilla; Emory University

(S097) RESULTS OF GAMMA KNIFE RADIOSURGERY FOR TUMOR RELATED TRIGEMINAL NEURALGIA
Prabu Raj Andiperumal Raj; Nishanth Sadhashiva; NIMHANS

 

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(S098) RATHKE CLEFT CYSTS: THE IMPACT OF AGE ON PATIENT CHARACTERISTICS, MANAGEMENT, AND SURGICAL OUTCOMES
Zain Peeran¹; Poojan Shukla¹; Robert Osorio²; Aarav Badani²; Aymen Kabir¹; Abraham Dada¹; Harmon Khela²; Mulki Mehari¹; Tej Tummala²; Mikias Negussie¹; Austin Lui²; Rithvik Ramesh¹; Hunter Yamada¹; Christian Jimenez¹; Akhil Rajidi¹; Manish K Aghi²; ¹School of Medicine, University of California San Francisco, San Francisco, CA, USA; ²Department of Neurological Surgery, University of California San Francisco, San Francisco, CA, USA

(S099) ENDOSCOPIC ENDONASAL AND TRANSCRANIAL APPROACHES TO SELLAR/SUPRASELLAR ARCHNOID CYSTS: INDICATIONS AND OUTCOMES
Hussam Abou-Al-Shaar, MD; Ibrahem Albalkhi; Joseph Garcia, MD; Ivo Peto, MD; Garret W Choby, MD; Eric W Wang, MD; Carl H Snyderman, MD; Paul A Gardner, MD; Georgios A Zenonos, MD; University of Pittsburgh Medical Center

(S100) SYMPTOM RESOLUTION AND RECURRENCE IN RESECTION VERSUS FENESTRATION FOR RATHKE'S CLEFT CYSTS: A PROPENSITY SCORE MATCHED ANALYSIS
Poojan D Shukla¹; Zain Peeran¹; Robert C Osorio, MD²; Aarav Badani²; Aymen Kabir¹; Abraham Dada¹; Rithvik Ramesh¹; Austin Lui²; Harmon Khela²; Mulki Mehari¹; Mikias Negussie¹; Hunter Yamada¹; Christian Jimenez¹; Tej Tummala²; Akhil Rajidi²; Manish K Aghi, MD, PhD²; ¹School of Medicine, University of California, San Francisco; ²Department of Neurological Surgery, University of California, San Francisco

(S101) IMPACT OF SOCIOECONOMIC STATUS ON TREATMENT DECISIONS AND HEALTH OUTCOMES IN RATHKE'S CLEFT CYST PATIENTS
Aarav Badani¹; Zain Peeran²; Poojan Shukla²; Robert Osorio¹; Tej Tummala¹; Akhil Rajidi¹; Mulki Mehari²; Aymen Kabir²; Abraham Dada²; Harmon Khela¹; Christian Jimenez²; Rithvik Ramesh²; Austin Lui¹; Mikias Negussie²; Hunter Yamada²; Manish K Aghi¹; ¹Department of Neurological Surgery, University of California, San Francisco, San Francisco, California, USA; ²School of Medicine, University of California San Francisco, San Francisco, CA, USA

(S102) FACTORS PREDICTIVE OF RADIOLOGIC RECURRENCE IN A LARGE COHORT OF 133 RATHKE'S CLEFT CYSTS RECEIVING TRANSSPHENOIDAL SURGERY
Kaasinath P Balagurunath, BA¹; Christopher S Hong, MD¹; Jakob V Gerstl, MBBS¹; Ryan Chreneck, MD¹; Sean Lyne, MD¹; Noah L Nawabi, BS¹; Rania A Mekary, PhD²; Timothy R Smith, MD, PhD¹; ¹Brigham and Women's Hospital; ²School of Pharmacy, Massachusetts College of Pharmacy and Health Sciences (MCPHS) University

(S105) THE CHANGING PARADIGM IN CRANIOPHARYNGIOMA MANAGEMENT: A COMPREHENSIVE INSTITUTIONAL ANALYSIS
Ishan Kanungo, MD¹; Wesley Shoap, MD²; Daniel Quintana, BS¹; Christian Jimenez, BS¹; Rithvik Ramesh, BA¹; Sandeep Kunwar, MD³; Lewis Blevins, MD¹; Manish Aghi, MD³; Phil Theodosopulos, MD³; Michael McDermott, MD³; Ezequiel Goldschmidt, MD, PhD³; ¹University of California San Francisco School of Medicine; ²LSU New Orleans Department of Neurosurgery; ³University of California San Francisco School of Medicine Department of Neurosurgery

(S106) INTRAOPERATIVE ULTRA-RAPID PCR FOR BRAF MUTATION DETECTION IN CRANIOPHARYNGIOMA
Akshay V Save, MD; Andrew Smith; Emilia Bianchini; Gilad Evrony; David Zagzag, MD, PhD; Daniel Orringer, MD; Seth Lieberman, MD; Donato Pacione, MD; NYU Langone Health

 

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(S109) THE ROLE OF EN-BLOC TEMPORO-PAROTID RESECTIONS FOR LOCALLY ADVANCED PAROTID GLAND MALIGNANCIES: PRELIMINARY ANALYSIS
Diego Cazzador; Tiziana Mondello; Giulia Tealdo; Marco Ferrari; Antonio Mazzoni; Piero Nicolai; Elisabetta Zanoletti; Otorhinolaryngology Unit - University of Padova

(S110) CONTRALATERAL MONONOSTRIL ENDOSCOPIC APPROACH USING THE CHOPSTICK TECHNIQUE: A MINIMALLY INVASIVE CONCEPT TO ACCESS THE FAR LATERAL SKULL BASE
Arianna Fava, MD; Caspar Chu, MD; Nobuyuki Watanabe, MD; Norio Ichimasu, MD; Jerold Justo, MD; Jonathan Chaney, MD; Rosaria Abbritti, MD; Thibault Passeri, MD; Anne Laure Bernat, MD; Sébastien Froelich, MD, PhD; Hôpital Lariboisière, Paris

(S114) ENDOSCOPIC TRANSORAL PARAMAXILLARY APPROACH TO THE FORAMEN OVALE; REJUVENATION OF THE HARTEL'S METHOD
Jae-Sung Park¹; Wonil Joo²; Doo-Sik Kong³; ¹Seoul St. Mary's Hospital; ²Eunpyeong St. Mary's Hospital; ³Samsung Medical Center

(S115) EXOCRANIAL OSEOUS MAPPING AS KEYLANDMARKS TO ESTIMATE THE PROXIMITY OF THE STYLOMASTOID FORAMEN: A MORPHOMETRIC ANATOMICAL DESCRIPTION IN MEXICAN POPULATION
Erik Burgos-Sosa, MD¹; Jose J. Julian-Mendoza, MD¹; J. Stephan Sanchez-Torrijos, AF²; Lorena Valencia-Caballero, MD²; Mario A. Taylor-Martínez, MD¹; Agustín Dorantes-Argandar, MD, FAANS¹; ¹Skull Base & Minimally Invasive Neurosurgery, Hospital Angeles Pedregal, Mexico City; ²Department of Anatomy, National Autonomous University of Mexico, Mexico City

(S116) EXPLORING PROFESSIONAL QUALITY OF LIFE, SELF-COMPASSION AND WELLNESS IN SKULL BASE SURGEONS
Janissardhar Skulsampaopol, MD¹; Sylvia Shitsama, MD²; Michael D Cusimano, MD, MHPE, FRCSC, DABNS, PhD, FACS, FAANS¹; ¹St Michael's Hospital, University of Toronto; ²Jomo Kenyatta University of Agriculture and Technology

 

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(V001) FLOATING ISLAND METHOD FOR THE PREVENTION OF THE LATERAL SINUS THROMBOSIS IN THE COMBINED TRANSPETROSAL APPROACH FOR PETROCLIVAL MENINGIOMA
Soichi Oya, MD¹; Shunya Hanakita, MD²; ¹Gunma University Graduate School of Medicine; ²Saitama Medical Center/University

(V002) BILATERAL OPTIC CANAL DECOMPRESSION AND SKULLBASE RESECTION DURING TRANSBASAL APPROACH FOR TOTAL EXCISION OF TUBERCULUM MENINGIOMA: 2D MICROSURGICAL VIDEO
Jeremy Kam, MBBS, BMedSc, MMed, FRACS; Celine Hounjet; Peter Gooderham, MD, FRCSC; Serge Makarenko, MD, FRCSC; Ryojo Akagami, MD, BSc, MHSc, FRCSC; Department of Neurosurgery, Vancouver General Hospital, Vancouver, BC, Canada

(V003) ENDOSCOPIC ENDONASAL APPROACH FOR TUBERCULUM MENINGIOMA
Nasya Mendoza-Elias¹; Sean Polster, Assistant Professor of Neurological Surg¹; Vijay Patel, Dir of Ped Complex Sinus Skull Base Surg²; Bastien Valencia, Research Fellow²; Roberto Alcazar Felix, Research Fellow²; Chris Lo, Assistant Professor of Otolaryngology²; ¹University of Chicago Medical Center; ²University of California San Diego

(V004) ENDOSCOPIC ENDONASAL TRANSTUBERCULAR APPROACH FOR RESECTION OF DIAPHRAGMA SELLAE MENINGIOMA: 2-DIMENSIONAL OPERATIVE VIDEO
Carter Suryadevara; Emma Bacus; Seth Lieberman, MD; Donato Pacione, MD; NYU Langone Health

(V005) EXPANDED ENDONASAL APPROACH TO TUBERCULUM SELLA MENINGIOMAS
Hussain Shallwani, MD¹; Muhammad Waqas, MD¹; Jaims Lim, MD¹; Jason M Davies, MD, PhD¹; Ryan McSpadden, MD²; Ayham Al Afif, MD, MSc²; Hanna N Algattas, MD¹; ¹University at Buffalo Jacobs School of Medicine; ²Roswell Park Cancer Institute

(V006) ENDOSCOPIC ASSISTED RETROSIGMOID CRANIOTOMY FOR PETROTENTORIAL MENINGIOMA - KEYHOLE APPROACH AND CRANIAL NERVE PRESERVATION
M. Salman Ali, MD; Fernando Vale, MD; Medical College of Georgia at Augusta University

(V007) INTERHEMISPHERIC OCCIPITAL APPROACH FOR A GIANT FALCOTENTORIAL MENINGIOMA
Erion J de Andrade, MD; Gustavo Pradilla, MD; Emory University

(V008) PATTERNS OF SUPERIOR HYPOPHYSEAL ARTERY INVOLVEMENT IN DIAPHRAGMA SELLA MENINGIOMA VERSUS TUBERUCLUM SELLA MENINGIOMA
Ali H Palejwala, MD; Matei Banu, MD; Juan Fernandez-Miranda, MD; Stanford University

 

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(V009) ORBITAL APEX AND CAVERNOUS SINUS EXENTERATION IN A PATIENT WITH RHINOCEREBRAL MUCORMYSOSIS
Sung-Woo Cho, MD; Tae-Bin Won, MD; Chae-Seo Rhee, MD; Kihwan Hwang, MD; Seoul National University Bundang Hospital

(V010) CAVERNOUS SINUS EXENTERATION FOR EXTENDED MUCORMYCOSIS
Vera Vigo, MD, PhD; Reza Arifianto Muhammad, MD; Yuanzhi Xu, MD; Christine K Lee, MD, PhD; Jayakar V Nayak, MD; Juan Carlos Fernandez-Miranda, MD; Stanford University

(V011) ALLERGIC FUNGAL SINUSITIS ERODING THE ANTERIOR SKULL BASE AND CLIVUS
Catherine P Policina, MD; Corinna G Levine, MD, MPH; Zachary Helmen, MD; Shivanand Avin Maharaj, MD; University of Miami

(V012) SURGICAL VIDEO: ENDOSCOPIC NASOPHARYNGECTOMY AND CAROTID ARTERY RESECTION FOR RECURRENT UNDIFFERENTIATED NASOPHARYNGEAL CARCINOMA
Aline Bruno Figuereido Nicolau, MD¹; Paula Angelica Lorenzon Silveira, MD, MSc²; Marcus Vinicius Furlan, MD³; Francisco Ferreira Ramos Junior, MD, PhD⁴; Ronaldo Nunes Toledo, MD, PhD²; ¹Universidade Federal de São Paulo; ²Universidade Federal de São Paulo, AC Camargo Cancer Center; ³Hospital Beneficência Portuguesa de São Paulo; ⁴Hospital Israelita Albert Einstein

(V013) A CASE OF A MASSIVE FRONTOETHMOID OSTEOMA RESECTED VIA DRAF III AND FRONTAL TREPHINATION
Jakob L Fischer, MD; Jessa E Miller, MD; Katherine M Lucarelli, MD; Won Kim, MD; Daniel B Rootman, MD; Jivianne T Lee, MD; University of California, Los Angeles (UCLA)

(V014) A CASE OF SYMPTOMATIC PNEUMOCEPHALUS CAUSED BY AN ETHMOID OSTEOMA
Ethan Cline¹; Shravan Atluri, MHA¹; Anthony Guidotti¹; Ondrej Choutka, MD²; Erin Reilly, MD²; ¹ICOM; ²Saint Alphonsus Medical Center

(V015) EXPANDING HORIZONS IN SKULL BASE SURGERY FOR THE LATERAL RECESS OF THE SPHENOID SINUS: CONTRALATERAL NASOFRONTAL TREPHINATION OPERATIVE VIDEO
Guilherme Mansur, MD¹; Moataz D Abouammo, MD, MSc¹; Mohammad B Alsavaf, MD¹; Chandrima Biswas, MD¹; Rodrigo Gehrke, MD¹; Claudio Callejas, MD¹; Maithrea S Narayanan, MBBS, MMED²; Guilherme Finger, MD, MSc¹; Kyle Wu, MD¹; Kathleen Kelly, MD¹; Ricardo L Carrau, MD¹; Daniel M Prevedello, MD¹; ¹The Ohio State University; ²Hospital Kuala Lumpur

(V016) VIDIAN NERVE-SPARING PTERYGOMAXILLECTOMY AND COMPOSITE CHONDROMUCOSAL NASOSEPTAL FLAP RECONSTRUCTION FOR EN BLOC RESECTION OF MAXILLARY SINUS AMELOBLASTOMA
Christopher Jabbour, MD; Daniel Schmidtman, MD; Kathryn Van Abel, MD; Carlos Pinheiro-Neto; Mayo Clinic

 

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(S117) STEREOTACTIC RADIOSURGERY IN THE MANAGEMENT OF PITUITARY METASTASES: AN INTERNATIONAL MULTICENTER STUDY
Hussam Abou-Al-Shaar, MD¹; Ibrahem Albalkhi²; Rimsha K Shariff, MD¹; Arka N Mallela, MD, MS¹; Pouneh K Fazeli, MD¹; Salem M Tos, MD³; Georgios Mantziaris, MD³; Ying Meng, MD⁴; Kenneth Bernstein, MD, MS⁴; Tehila Kaisman-Elbaz, MD, PhD⁵; Hanan Abofani, MD⁵; Yen-Yu Lin, MD⁶; Cheng-chia Lee, MD⁶; Manjul Tripathi, MCh⁷; Rituraj Upadhyay, MD⁸; Joshua D Palmer, MD⁸; Ahmed M Nabeel, MD, PhD⁹; Wael A Reda, MD, PhD⁹; Sameh R Tawadros, MD, PhD⁹; Khaled Abdelkarim, MD, PhD⁹; Amr M El-Shehaby, MD, PhD⁹; Reem M Emad, MD, PhD⁹; Selcuk Peker, MD¹⁰; Yavuz Samanci, MD¹⁰; Rodney E Wegner, MD¹¹; Matthew J Shepard, MD¹¹; Roman Liscak, MD¹²; Gabriela Simonova, MD¹²; Timoteo Almeida¹³; Carolina Benjamin, MD¹³; Douglas Kondziolka, MD, MSc⁴; Jason P Sheehan, MD, PhD³; Ajay Niranjan, MD, MBA¹; L. Dade Lunsford, MD¹; ¹University of Pittsburgh Medical Center; ²Alfaisal University; ³University of Virginia; ⁴NYU Langone; ⁵Sheba Medical Center; ⁶Taipei Veterans General Hospital; ⁷PGIMER; ⁸Ohio State University; ⁹Nasser Institute Hospital; ¹⁰Koc University School of Medicine; ¹¹Allegheny Health Network; ¹²Na Homolce Hospital; ¹³University of Miami

(S118) CRANIOPHARYNGIOMAS TREATED WITH THE INSIDE-OUT SUBPIAL TECHNIQUE DURING THE ENDOSCOPIC ENDONASAL APPROACH. SURGICAL TECHNIQUE BREAKDOWN AND CLINICAL OUTCOMES OVER THE LAST 5-YEARS.
Maria Karampouga, MD¹; Arseniy Pichugin, MD, PhD²; Albert Trondin, MD³; Garret W Choby, MD⁴; Eric Wang, MD⁴; Carl H Snyderman, MD, MBA⁴; Michael M Mcdowell, MD¹; Paul A Gardner, MD¹; Georgios A Zenonos, MD¹; ¹Department of Neurological Surgery, Center for Cranial Base Surgery, University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania, USA; ²Department of Neurological Surgery, Kazan State Medical University, Kazan, Russia; ³Department of Neurological Surgery, Hospital Clinico San Carlos, Madrid, Spain; ⁴Department of Otolaryngology, University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania, USA

(S119) REVISION ENDOSCOPIC TRANSNASAL TRANSSPHENOIDAL SURGERY FOR RECURRENT PITUITARY ADENOMAS: RISK FACTORS AND CLINICAL OUTCOMES
Jessa E Miller, MD¹; Kevin T Grafmiller, MD²; Nikitha Kosaraju, MD¹; Myungjun Ko, MD¹; Benjamin R Uy, MD, PhD¹; Hye Rhyn Chung, MD¹; Ryan M Shih, BS¹; Shannon R Esswein, MD, PhD¹; Won Kim, MD¹; Jivianne T Lee, MD¹; Marvin Bergsneider, MD¹; Marilene B Wang, MD¹; ¹University of California, Los Angeles; ²North Shore Ear Nose and Throat

(S120) ADJUVANT CHEMORADIATION CONFERS A SURVIVAL BENEFIT IN SELLAR/SUPRASELLAR ADULT ATYPICAL TERATOID RHABDOID TUMOR
Miguel A Hernandez-Rovira, BS¹; Michelle Connor, MD²; Rob Osario, MD³; Emilie Russler-Germain, MD, PhD⁴; Robert E Schmidt, MD, PhD⁴; Gabrielle W Johnson, MD, MSCI²; Julie Silverstein, MD⁵; Sonika Dahiya, MD⁴; Nyssa F Farrell, MD⁶; Mia C Weiss, MD⁷; Gregory J Zipfel, MD²; Jiayi Huang, MD⁸; Dimitrios Mathios, MD²; ¹School of Medicine, Washington University in St. Louis, St. Louis, MO 63110; ²Department of Neurosurgery, Washington University School of Medicine, St. Louis, MO 63110; ³Department of Neurosurgery, University of California San Francisco, San Francisco, CA 94143; ⁴Department of Pathology & Immunology, Washington University in St. Louis, St. Louis, MO 63110; ⁵Division of Endocrinology, Metabolism and Lipid Research, Department of Medicine, Washington University in St. Louis, St. Louis, MO 63110; ⁶Department of Otolaryngology, Washington University in St. Louis, St. Louis, MO 63110; ⁷Division of Oncology, Department of Medicine, Washington University in St. Louis, St. Louis, MO 63110; ⁸Department of Radiation Oncology, Washington University in St. Louis, St. Louis, MO 63110

(S122) IMMUNOHISTOCHEMISTRY FOR LINEAGE SPECIFIC TRANSCRIPTION FACTORS MARKEDLY IMPROVES THE ACCURACY OF DIAGNOSIS IN PITUITARY ADENOMA
Thomas Hanks, BS; Spencer Raub, BA; Kyly Hiatt, BS; Jessica Eaton, MD; Kaity Hartl, MS, PAC; Dominic Nistal, MD; Fatima El-Ghazali, MD; Aria Jamshidi, MD; Samuel Emerson, MD, PhD; Manuel Ferreira, MD, PhD; Jacob Ruzevick, MD; University of Washington

(S123) ENDOSCOPIC ENDONASAL PITUITARY TRANSPOSITION FOLLOWED BY POSTERIOR CLINOIDECTOMY TO ACCESS THE RETROSELLAR AND RETROINFUNDIBLAR SPACE: A COMPARISON OF ENDOCRINOLOGICAL OUTCOMES BETWEEN EXTRADURAL, INTERDURAL AND INTRADURAL TECHNIQUES
Maria José Pachón-Londoño, MD; Vita A Olson, BA; Maged T Ghoche, MD; Estefana Bcharah; Abhijith Bathini, MD; Charbel Moussalem, MD; Devi P Patra, MD; Bernard R Bendok, MD, MSCI; Mayo Clinic

(S124) ELECTROENCEPHALOGRAPHIC CHANGES IN OXYTOCIN DEFICIENCY AFTER SELLAR SURGERY-A PRELIMINARY STUDY
Bulent Omay, MD; Olufisayo Adeyina; Josephine Levy; Mc Noriel Baldonado; Sertac Ozcan, MD; Ryan Rimmer, MD; Silvio Inzucchi, MD; Helena Rutherford, PhD; Yale School of Medicine

(S125) POSTOPERATIVE CEREBROSPINAL FLUID LEAK NEGATIVELY IMPACTS LONG-TERM VISUAL RECOVERY AFTER ENDOSCOPIC PITUITARY ADENOMA RESECTION
Alex Devarajan; Emily Chapman; Jack Zhang; Ansley Unterberger; Rui Feng; Emery Monnig; Mehek Dedhia; Akhil Rao; Tirone Young; Joshua Bederson; Raj Shrivastava; Icahn School of Medicine

(S008) SELECTIVE RESECTION OF THE MEDIAL WALL OF THE CAVERNOUS SINUS: A PROSPECTIVE STUDY
Dan Zimelewicz Oberman, MD, MSc¹; Emiliano Sanchez-Garavito, MD¹; Carlos Perez-Vega, MD¹; Angela Donaldson²; Osarenoma Olomu, MD²; Stephen Graepel, MD³; Mark Edgar, MD⁴; Alfredo Quinones Hinojosa, MD¹; Kaisorn Chaichana, MD¹; Susan L. Samson, MD, PhD⁵; João Paulo Almeida, MD, PhD¹; ¹Department of Neurosurgery, Mayo Clinic, Jacksonville, Florida, USA; ²Department of Otolaryngology, Mayo Clinic, Jacksonville, Florida, USA.; ³Department of Neurosurgery, Mayo Clinic, Minnesota, Rochester, MN, USA; ⁴Department of Pathology, Mayo Clinic, Minnesota, Rochester, MN, USA; ⁵Division of Endocrinology, Diabetes and Metabolism, Department of Medicine, Department of Neurological Surgery, Mayo Clinic, Jacksonville, FL, USA.

 

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(S126) A SURGICAL APPROACH AND INSTITUTIONAL EXPERIENCE WITH PARTIAL LABYRINTHECTOMY PETROUS APICECTOMY SURGERY: A TECHNICAL DESCRIPTION AND SUMMARY OF INSTITUTIONAL EXPERIENCE OF 66 CASES
Celine D Hounjet, MD, BSc¹; Jeremy Kam, MBBS, FRACS, PFET²; Serge Makarenko, MD, FRCSC¹; Benjamin Brakel¹; Brian Westerberg, MD, MHSc, FRCSC¹; Ryojo Akagami, MD, BSc, MHSc, FRCSC¹; ¹University of British Columbia; ²Monash University

(S127) PREDICTOR OF NEW POSTOPERATIVE VISUAL DETERIORATION AND DEFICIT POST ENDOSCOPIC ENDONASAL PITUITARY ADENOMA RESECTION
Sami Khairy, MD; Mouaz Saymeh, MD; Jessica Rabski, MD; Shaun Kilty, MD; Fahad AlKherayf, MD; Division of Neurosurgery, Department of Surgery, The Ottawa Hospital, Ottawa, Ontario, Canada.

(S128) FREE TISSUE FLAPS FOR RECONSTRUCTIONS OF ADVANCED ONCOLOGICAL DEFECTS OF THE FACE AND ANTERIOR SKULL BASE: PROSPECTIVE AND RANDOMIZED STUDY
Bruno Albuquerque, MD, MSc¹; Eduardo C de Moraes, MD¹; Marcus A Acioly, PhD, MD²; Pedro N Araujo, MD¹; Iasmin C de Sá, MD¹; Fernando L Dias, PhD, MD¹; ¹Brazilian National Cancer Institute; ²Federal University of Rio de Janeiro

(S129) MULTIDISCIPLINARY APPROACH TO VESTIBULAR SCHWANNOMAS
Evangelos Drosos, Mr¹; Francesca Colombo, Ms¹; Helen Maye, Ms¹; Charlotte Hammerbeck-Ward, Ms²; Andrew T King, Prof¹; Pathmanaban N Omar, Prof¹; Simon K Lloyd, Prof³; Simon Freeman, Mr³; Rohit Nambiar, Dr¹; Andrea Wadeson, Ms¹; Helen Entwistle, Ms¹; Scott Rutherford, Mr¹; ¹Department of Neurosurgery, Manchester Centre for Clinical Neurosciences, Salford Royal Hospital NHS Foundation Trust, Salford, UK; ²Department of Neurosurgery, University Hospitals NHS FT, Royal Sussex County Hospital, Brighton, UK; ³Department of Ears, Nose and Throat, Manchester Centre for Clinical Neurosciences, Salford Royal Hospital NHS Foundation Trust, Salford, UK

(S130) HEMODYNAMIC CLASSIFICATION OF CEREBRAL ARTERIOVENOUS MALFORMATIONS: A STATISTICAL MODEL TO BETTER PREDICT THE RISK OF HEMORRHAGE
Marta Rico Pereira, M, D; Hospital de la Santa Creu i Sant Pau

(S131) SPONTANEOUS REGRESSION OF VESTIBULAR SCHWANNOMAS: A CLINICAL AND RADIOGRAPHIC ASSESSMENT
Celine D Hounjet, MD, BSc¹; Jeremy Kam, MBBS, FRACS, PFET²; Hannah Schoenroth¹; Brian Westerberg, MD, MHSc, FRCSC¹; Ryojo Akagami, MD, BSc, MHSc, FRCSC¹; ¹University of British Columbia; ²Monash University

(S132) COMBINED TRANSCAVERNOUS AND ANTERIOR TRANSPETROUS APPROACH: TECHNICAL ASPECTS AND LESSONS LEARNED FROM 14 CASES WITH EMPHASIS ON A "TAG TEAM" APPROACH AND A NOVEL CSF RELEASE TECHNIQUE
Nitish Ranjan, Dr; Kuntal Kanti Das, Dr; Arun Kumar Srivastava, Dr; Awadhesh Kumar Jaiswal, Dr; Sanjay Gandhi Post Graduate Institute of Medical Sciences

(S133) SURGICAL MANAGEMENT OF TEMPORAL BONE MALIGNANCY: A DECISION WITHOUT REGRET
Mohamed Badr-El-Dine, Professor, MD, PhD; Sultan Qaboos University Hospital Muscat Oman

(S134) GRADUATED REPAIR OF SKULL BASE DEFECTS IN ENDOSCOPIC PITUITARY ADENOMA SURGERY
Macarena Viñuela¹; Claudia González¹; Francisco Guarda²; Flavia Nilo²; Pablo Villanueva³; Claudio Callejas¹; ¹Otolaryngology Department, School of Medicine, Pontificia Universidad Católica de Chile, Santiago, Chile; ²Endocrinology Department, School of Medicine, Pontificia Universidad Católica de Chile, Santiago, Chile; ³Neurosurgery Department, School of Medicine, Pontificia Universidad Católica de Chile, Santiago, Chile

 

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(V017) OLFACTION-SPARING CUSTOMIZED CORRIDORS IN ENDOSCOPIC APPROACH TO ORBITAL ROOF MENINGIOMA
Alexander J Straughan, MD¹; Shiwei Huang, MD, MS²; Autefeh Sajjadi, MD¹; Kolin Rubel, MD¹; Andrew Venteicher, MD, PhD²; Neal Godse¹; ¹University of Minnesota Department of Otolaryngology; ²University of Minnesota Department of Neurosurgery

(V018) ENDOSCOPIC TRANSORBITAL SPHENO-ORBITAL MENINGIOMA REMOVAL AND ANTERIOR CLINOIDECTOMY -
Guilherme Gago, MD; Antonio Strangio, MD; Annie Moreau, MD; Pierre-Olivier Champagne, MD, PhD; Université Laval

(V019) EXTREME LATERAL PARTIAL TRANSCONDYLAR APPROACH FOR EXCISION OF A GIANT FORAMEN MAGNUM MENINGIOMA IN A PATIENT WITH DOMINANT OCCIPITAL AND CIRCULAR SINUS
Varadaraya S. Shenoy, MD; Basavaraj V. Ghodke, MD; Laligam N. Sekhar, MD; Harborview Medical Center, University of Washington, Seattle

(V020) TECHNICAL CONSIDERATIONS FOR THE RESECTION OF LARGE SPHENOID WING MENINGIOMA: STRATEGIES AND VESSEL HANDLING
Mehdi Khaleghi, MD; Adnan Hussain Shahid, MBBS, MS, MCh; Danner Buttler, BS; Sudhir Suggala, MBBS, MS, MCh; Garrett Dyess, BA; Ursula Hummel, MHS, PAC; Jai D Thakur, MD, FAANS; University of South Alabama

(V021) THE PRETEMPORAL TRASCAVERNOUS APPROACH FOR RESECTION OF SPHENOTENORAL MENINGIOMA
Mateus R Neto, Neurosurgeon¹; Pedro Victor V De Freitas²; Igor Napoleao P De Araujo²; Jose M Rotta²; Matheus F Lourenço³; ¹Beneficiencia Paulista, Iamspe E Instituto De Ciencias Neurologicas; ²IAMSPE; ³A.C.Camargo Cancer Center

(V022) POSTERIOR INTERHEMISPHERIC APPROACH FOR RESECTION OF FALCOTENTORIAL MENINGIOMA
Sean B Lyne, MD; Wenya L Bi, MD; Brigham and Women's Hospital

(V023) SPHENO-TUBERCULO-PLANUM MENINGIOMAS - TECHNICAL NUANCES
M. Salman Ali, MD; Kenneth Byrd, MD; Fernando Vale, MD; Medical College of Georgia at Augusta University

(V024) RETROSIGMOID SUPRAMEATAL TRANSTENTORIAL APPROACH FOR PETROCLIVAL MENINGIOMA: MAXIMIZING RETROSIGMOID CORRIDOR
Adnan H Shahid, MBBS, MS, MCh; Sudhir Suggala, MBBS, MS, MCh; Danner Butler, BS; Garrett Dyess; Ursula Hummel; Danielle Chason; Jai D Thakur, MD; University of South Alabama Mobile

 

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(S135) CAREER TRAJECTORY FOR NEUROSURGICAL SKULL BASE FELLOWS: 2019 - 2023
Fatima Gauhar, Dr; Rida Bonday; Harika S Koduru; Robert J Dambrino IV, Dr; Lola B Chambless, Dr; Patrick D Kelly, Dr; Vanderbilt University Medical Center

(S136) THE HISTORY OF THE NORTH AMERICAN SKULL BASE SOCIETY FROM THE RECOLLECTIONS OF EARLY PRESIDENTS
Karenna J Groff¹; Aneek Patel¹; Carter M Suryadevara¹; David B Kurland¹; Akshay Save¹; Donato Pacione¹; John G Golfinos¹; Carl H Snyderman²; Chandranath Sen¹; ¹NYU Langone Health; ²University of Pittsburgh

(S137) HOW TO ESTABLISH MICROSURGERY LABORATORY TRAINING IN LMICS: AN EXPERIENCE IN 35 CENTERS ACROSS 20 LMICS
Abdullah Keles, MD; Huseyin E Ak, MD; Mustafa K Baskaya, MD; Department of Neurological Surgery University of Wisconsin School of Medicine and Public Health

(S138) ADVANCING NEUROSURGICAL TRAINING ENVIRONMENT FOR SKULL BASE APPROACHES: EFFICACY OF INNOVATIVE 3D COMPUTER GRAPHICS
Tatsuya Uchida¹; Taichi Kin²; Juan Fernandez-Miranda¹; Aaron Cohen-Gadol³; Nobuhito Saito²; ¹Stanford University; ²The University of Tokyo; ³Keck School of Medicine of USC

(S139) VALIDATION OF A 3D PRINTED MODEL FOR PITUITARY NEUROENDOCRINE TUMOUR RESECTION, VASCULAR INJURY MANAGEMENT, CEREBROSPINAL LEAK REPAIR AND SKULL BASE RECONSTRUCTION
Nicholas G Candy¹; Alexander S Zhang²; George Bouras³; Alistair K Jukes¹; Stephen Santoreneos¹; Nick Vrodos⁴; Peter-John Womald²; Alkis J Psaltis²; ¹Royal Adelaide Hospital; ²Queen Elizabeth Hospital; ³Basil Hetzel Institute for Translational Research; ⁴Flinders Medical Centre

(S140) BREAKTHROUGHS IN SKULL BASE LABORATORY TRAINING AND PREOPERATIVE PLANNING: LATERAL THINKING AND REPURPOSING OLD/OBSOLETE IMAGING CDS
Diego S Morales Roccuzzo; Mohammadmahdi Sabahi; David Monterosso-Cohen, MD; Serdar Rahmanov, MD; Shadi Bsat; Steven Lichtenberg; Ryan Gordon; Hamid Borghei-Razavi; Badih Adada; Cleveland Clinic Florida

(S142) DEVELOPMENT OF A COMPREHENSIVE PHOTOGRAMMETRIC ATLAS OF ENDOSCOPIC ENDONASAL APPROACHES
Amedeo Piazza, MD, PhDs¹; Yohan Alexander, BA¹; Fabio Torregrossa, MD¹; Luciano L Leonel, PhD¹; Carlos D Pinheiro-Neto, MD, PhD¹; Antonio Santoro²; Matteo De Notaris, MD, PhD³; Maria Peris Celda, MD, PhD¹; ¹Mayo Clinic; ²Sapienza University of Rome; ³University of Salerno, Italy

(S141) IMMERSIVE 3D PHOTOGRAMMETRY OF THE ANTERIOR CIRCULATION WITH OVERLAPPED ANGIOGRAM
Amedeo Piazza, MD, PhDs; Yohan A Alexande, BA; Fabio Torregrossa; Luciano P Leonel, PhD; Michael Link, MD; Maria Peris Celda, MD, PhD; Giuseppe Lanzino, MD; Mayo Clinic

(S143) A COMPARATIVE EVALUATION OF CUSTOM CHATGPT-4O (CHET-GPT) VERSUS EPIC DAX FOR NEUROSURGICAL SOAP NOTES IN SKULL BASE SURGERY
Anthony Guidotti¹; Ethan Cline¹; Shravan Atluri, MHA¹; Ondrej Choutka, MD²; ¹Idaho College of Osteopathic Medicine; ²Saint Alphonsus Regional Medical Center

 

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(V025) ANEURYSM TRAPPING AND SIDE-TO-SIDE ANASTOMOSIS FOR TREATMENT OF RUPTURED MCA DISSECTING ANEURYSM
Spyridon Karadimas, MD, PhD¹; Nimer Adeeb, MD¹; Eva Wu, MD²; David Altshuler, MD³; Jacques Morcos, MD¹; ¹UTHealth Houston; ²University of Miami; ³University of Michigan

(V026) MICROSURGICAL CLIPPING OF A TYPE B OPHTHALMIC ARTERY ANEURYSM VIA A CRANIO-ORBITAL APPROACH WITH EXTRADURAL CLINOIDECTOMY
John E Dugan, BA¹; Sean M Himel, MD¹; Kara A Parikh, MD¹; Nickalus R Khan, MD²; ¹University of Tennessee Health Science Center; ²Semmes Murphey Neurologic & Spine Clinic

(V027) RUPTURE OF A BLISTER ANEURYSM DURING ENDOSCOPIC ENDONASAL TUBERCULUM SELLAE MENINGIOMA REMOVAL.
Antonio Strangio, MD; Sylvie Nadeau, MD; Pierre-Olivier Champagne, PhD, MD; Laval University Hospital Centre

(V028) VERTEBRAL ARTERY DECOMPRESSION FOR THE MANAGEMENT OF BOW HUNTER'S SYNDROME
Hussam Abou-Al-Shaar, MD; Arka N Mallela, MD, MS; Paul A Gardner, MD; University of Pittsburgh Medical Center

(V029) TANDEM CLIPPING OF MULTIPLE MIDDLE CEREBRAL ARTERY ANEURYSMS WITH DIFFERENT PROJECTION ANGLES
Mehdi Khaleghi, MD; Sudhir Suggala, MBBS, MS, MCh; Adnan Hussain Shahid, MBBS, MS, MCh; Danner Buttler, BS; Garrett Dyess, BA; Rebecca Sugg, MD; Ursula Hummel, MHS, PAC; Jai D Thakur, MD; University of South Alabama

(V030) TRANS-SYLVIAN SUBTEMPORAL APPROACH FOR MICROSURGICAL CLIP LIGATION OF SEPARATE BASILAR APEX AND POSTERIOR CEREBRAL ARTERY ANEURYSMS
Kara A Parikh, MD; Mustafa Motiwala, MD; Emal Lesha, MD; John Dugan, BA; Nickalus R Khan, MD; University of Tennessee/Semmes Murphey

(V031) MICROSURGICAL OBLITERATION OF A SUPERIOR PETROSAL DURAL ARTERIOVENOUS FISTULA
Ryan M Naylor, MD, PhD; Giuseppe Lanzino, MD; Michael J Link, MD; Mayo Clinic

(V032) FLOW REVERSAL TREATMENT OF GIANT ICA ANEURYSM BY IMAX- MCA BYPASS
Alexander Kuffer, MD; Amir R Dehdashti, MD; Northwell

 

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(S145) ESTABLISHING AN ASYNCHRONOUS CURRICULUM FOR MICROSURGICAL EDUCATION: A PILOT STUDY
Alankrita Raghavan¹; Joshua Woo²; Alexander Suarez¹; Katherine McDaniel¹; Brandon Smith¹; ¹Duke University Hospital; ²Duke University School of Medicine

(S146) CLOSING THE GAP: EVALUATING SKULL BASE AND VENTRICULAR ENDOSCOPY ACROSS LATIN AMERICAN AND AFRICAN COUNTRIES
Guilherme Mansur, MD¹; Leopoldo M Furtado, MD²; José Aloysio C Val, MD, PhD²; Rodrigo M Faleiro, MD¹; José Maurício Siqueira, MD¹; Roberto A Dezena, MD, PhD³; Jair L Raso, MD, PhD⁴; Samuel T Zymberg, MD, PhD⁵; Diego A Duarte, MD⁶; Ellianne J Rubio, MD⁷; Adilson de Oliveira, MD⁸; Artur Cunha, MD, PhD⁹; Alvaro Córdoba, MD¹⁰; Luis A Borba, MD, PhD¹¹; Adrian C Chacon, MD¹²; Mikail Sallé, MD¹³; Daniel M Prevedello, MD¹⁴; Lucas R Lima, MD, PhD¹; ¹Hospital Felicio Rocho; ²Hospital Vila da Serra; ³Universidade Federal do Triângulo Mineiro; ⁴Biocor Instituto; ⁵Escola Paulista de Medicina; ⁶Hospital Nacional de Itaugua; ⁷Curaçao Medical Center; ⁸Universidade Agostinho Neto; ⁹Hospital da Restauração; ¹⁰ASESP - CASMU; ¹¹Universidade Federal do Paraná; ¹²Hospital Nacional de Niños "Dr. Carlos Saenz Herrera; ¹³Hospital Central de Maputo; ¹⁴The Ohio State University

(S147) VALUE OF ADVANCED PRACTICE PROVIDERS IN FOSTERING THE DEVELOPMENT OF ELECTIVE EARLY ACADEMIC SKULL BASE PRACTICE WITHOUT RESIDENTS/FELLOWS IN A TERTIARY ACADEMIC CENTER: A UNIFIED SKULL BASE
Ursula N Hummel, MHS, PAC; Adnan H Shahid, MBBS, MS, MCh; Mehdi Khaleghi, MD; Danielle N Chason, BCAGACNP, RNFA; Danner W Butler, MS; Garrett Dyess, BA; Maxon Bassett, MS; Jai D Thakur, MD, FAANS; University of South Alabama

(S149) GENDER DISPARITY IN ACADEMIC CAREER ADVANCEMENT OF SKULL BASE SURGEONS: A CROSS SECTIONAL ANALYSIS
Rachel A Akers; Sushanth Neerumalla; Anya J Forma; Rush University Medical Center

(S151) ERGONOMIC TRENDS IN ENDOSCOPIC SKULL-BASE SURGEONS: A SURVEY TO THE NORTH AMERICAN SKULL BASE SOCIETY
Shreya Mandloi, BS¹; Alexander Duffy, MD²; Praneet Kaki, BS¹; Elina M Toskala, MD, PhD, MBA¹; Marc Rosen, MD¹; Christopher Farrell, MD¹; James J Evans, MD¹; Gurston G Nyquist, MD¹; Mindy Rabinowitz, MD¹; ¹Thomas Jefferson University; ²Medical University of South Carolina

(S152) REVEALING THE INTRINSIC ANATOMY OF THE BRAINSTEM: ADVANCING VISUALIZATION THROUGH FIBER DISSECTION AND PHOTOREALISTIC PHOTOGRAMMETRY-BASED THREE-DIMENSIONAL MODELING
Rahmanov Serdar¹; Hüseyin Ikbal Akdemir²; Baris Kaval³; Abuzer Güngör⁴; Muhammet Enes Gurses⁵; Yücel Dogruel⁶; Ugur Türe⁷; ¹Cleveland Clinic Florida; ²Marmara University; ³Bakirköy Prof. Dr. Mazhar Osman Training and Research Hospital; ⁴Istinye University; ⁵University of Southern California; ⁶Tepecik Training and Research Hospital; ⁷Yeditepe University

 

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(V033) SUPERFICIAL TEMPORAL ARTERY - DOUBLE BARREL LATERAL CIRCUMFLEX FEMORAL ARTERY - M2 BYPASS AND TRAPPING OF MCA PSEUDOANEURYSM, OBLITERATION OF CRIBIFORM PLATE DURAL ARTERIOVENOUS FISTULA
Vincent N Nguyen, MD; Robert G Briggs, MD; Nadia A Atai, MD, PhD; Joseph N Carey, MD; Jonathan J Russin, MD; University of Southern California

(V034) MICROSURGICAL CLIPPING OF A LARGE OPHTHALMIC ARTERY ANEURYSM WITH USE OF ENDOVASCULAR BALLOON GUIDE FOR PROXIMAL CONTROL AND ASPIRATION DECOMPRESSION WITH PROPHYLACTIC STA-MCA BYPASS
Ehsan Dowlati, MD¹; Justin Turpin, MD¹; Hayley Donaldson, MS²; Timothy White, MD¹; Shyle Mehta, MD¹; Danielle Golub, MD¹; Amir R Dehdashti, MD¹; ¹North Shore University Hospital; ²Rutgers-Robert Wood Johnson Medical School

(V035) INTERNAL CAROTID ARTERY TO M2 BYPASS AND CLIP TRAPPING FOR GIANT M1 ANEURYSM
Caroline Hadley; Laligam Sekhar, MD; University of Washington Department of Neurosurgery

(V036) STA-MCA BYPASS AND EXCISION OF A GIANT PARTIALLY THROMBOSED RUPTURED M2 ANEURYSM
Spyridon Karadimas¹; Yosef Ellenbogen²; Rabab Alshahrani³; Ivan Radovanovic²; ¹Thomas Jefferson University; ²University of Toronto; ³Trillium Health Partners

(V037) PICA TO VERTEBRAL ARTERY RE-IMPLANTATION BYPASS FOR THE MANAGEMENT OF PROXIMAL PICA ANEURYSM
Hussam Abou-Al-Shaar, MD; Arka N Mallela, MD, MS; Georgios A Zenonos, MD; University of Pittsburgh Medical Center

(V038) TREATMENT OF A RECURRENT CAVERNOUS SINUS MENINGIOMA CAUSING SEVERE ICA STENOSIS: IMAX-RAG-M2 BYPASS, ICA COILING, AND TUMOR RESECTION
Sonia Ajmera, MD¹; Stephen P Miranda, MD¹; Phillip J Storm, MD²; Jan-Karl Burkhardt, MD¹; ¹University of Pennsylvania Health System, Department of Neurosurgery; ²Children's Hospital of Philadelphia, Department of Neurosurgery

(V039) ECA TO V3 BYPASS FOR VERTEBROBASILAR INSUFFICIENCY
Jessica Eaton; Varadaraya Shenoy, MD; Emma Celano; Laligam Sekhar; University of Washington

(V040) ENDOSCOPIC TRANS-PTERIONAL PORT APPROACH FOR MICROSURGICAL CLIPPING OF MCA ANEURYSM
Spyridon Karadimas¹; Ivan Radovanovic²; ¹Thomas Jefferson University; ²University of Toronto

 

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(S153) PREDICTING OLFACTORY BULB INFILTRATION AND MORPHOLOGICAL CHANGES IN OLFACTORY NEUROBLASTOMA USING MRI
Teppei Takeda¹; Yasine Mirmozaffari²; Kazuhiro Omura¹; Adam J Kimple²; Brent A Senior²; Charles S Ebert²; Cristine Klatt-Cromwell²; Brian D Thorp²; ¹The Jikei University School of Medichine; ²University of North Carolina - Chapel Hill.

(S154) GENETIC ALTERATIONS IN OLFACTORY NEUROBLASTOMA: INSIGHTS FROM THE AACR GENIE DATABASE
Beau Hsia, BS¹; Gabriel Bitar, BS¹; Saif Alshaka, BS¹; Bastien A Valencia, MD²; Michael L Levy, MD, PhD³; Danielle Levy, MD³; John Crawford, MD⁴; Mariko Sato, MD, PhD⁴; Farhoud Faraji, MD, PhD⁵; Jeeho D Kim, MD⁶; Sean Polster, MD⁷; Vijay A Patel, MD⁵; ¹Creighton University School of Medicine; ²Department of Otolaryngology - Head and Neck Surgery, Mayo Clinic, Jacksonville; ³Department of Neurosurgery, University of California San Diego, Rady Children's Hospital - San Diego; ⁴Pediatrics, University of California Irvine; ⁵Division of Pediatric Otolaryngology, Rady Children's Hospital - San Diego; ⁶Naval Medical Center San Diego; ⁷Department of Neurosurgery, University of Chicago

(S155) PROTON BEAM RADIOTHERAPY VERSUS INTENSITY-MODULATED RADIOTHERAPY IN OLFACTORY NEUROBLASTOMA: A MULTI-INSTITUTIONAL PROPENSITY MATCHED STUDY
Anthony Tang¹; Jack K Donohue¹; Samuel Adida¹; Joao Paulo Almeida²; Pierre-Olivier Champagne³; Juan Fernandez-Miranda⁴; Paul Gardner⁵; Peter Hwang⁶; Jayakar Nayak⁶; Chirag Patel⁷; Zara Patel⁶; Maria Peris-Celda⁸; Carlos Pinheiro-Neto⁹; Olabisi Sanusi¹⁰; Carl Snyderman¹¹; Brian D Thorp¹²; Jamie J Van Gompel⁸; Georgios A Zenonos⁵; Nathan T Zwagerman¹³; Eric W Wang¹¹; Mathew Geltzeiler¹⁴; Garret W Choby¹¹; ¹University of Pittsburgh, School of Medicine; ²Department of Neurosurgery, Mayo Clinic, Jacksonville, Florida, USA; ³Department of Neurosurgery, CHU de Québec-Université Laval, Quebec City, Quebec, Canada; ⁴Department of Neurosurgery, Stanford Hospital, Stanford, California.; ⁵Department of Neurological Surgery, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA; ⁶Department of Otolaryngology-Head and Neck Surgery, Stanford University School of Medicine, Palo Alto, California, USA; ⁷Department of Otolaryngology-Head and Neck Surgery, Loyola University Medical Center, Maywood, Illinois, United States; ⁸Department of Neurologic Surgery, Mayo Clinic,Rochester, MN; ⁹Department of Otorhinolaryngology-Head and Neck Surgery, Mayo Clinic, Rochester, Minnesota, US; ¹⁰Department of Neurosurgery, Oregon Health & Science University, Portland, Oregon, USA; ¹¹Department of Otolaryngology, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA; ¹²Department of Otolaryngology/Head and Neck Surgery at the University of North Carolina, Chapel Hill, North Carolina, USA; ¹³Department of Neurosurgery, Froedtert and the Medical College of Wisconsin, Milwaukee, Wisconsin, USA; ¹⁴Department of Otolaryngology-Head and Neck Surgery, Oregon Health & Science University, Portland, Oregon, USA

(S156) THE USE OF INDUCTION CHEMOTHERAPY IN OLFACTORY NEUROBLASTOMA: A MULTI-INSTITUTIONAL SERIES
Anthony Tang¹; Samuel Adida¹; Joao Paulo Almeida²; Pierre-Olivier Champagne³; Juan Fernandez-Miranda⁴; Paul Gardner⁵; Peter Hwang⁶; Jayaker Nayak⁶; Chirag Patel⁷; Zara Patel⁶; Maria Peris-Celda⁸; Carlos Pinheiro-Neto⁹; Olabisi Sanusi¹⁰; Carl Snyderman¹¹; Brian D Thorp¹²; Jamie J Van Gompel⁸; Georgios A Zenonos⁵; Nathan T Zwagerman¹³; Eric W Wang¹¹; Mathew Geltzeiler¹⁴; Garret W Choby¹¹; ¹University of Pittsburgh, School of Medicine; ²Department of Neurosurgery, Mayo Clinic, Jacksonville, Florida, USA; ³Department of Neurosurgery, CHU de Québec-Université Laval, Quebec City, Quebec, Canada.; ⁴Department of Neurosurgery, Stanford Hospital, Stanford, California.; ⁵Department of Neurological Surgery, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA.; ⁶Department of Otolaryngology-Head and Neck Surgery, Stanford University School of Medicine, Palo Alto, California, USA; ⁷Department of Otolaryngology-Head and Neck Surgery, Loyola University Medical Center, Maywood, Illinois, United States; ⁸Department of Neurologic Surgery, Mayo Clinic,Rochester, MN; ⁹Department of Otorhinolaryngology-Head and Neck Surgery, Mayo Clinic, Rochester, Minnesota, US; ¹⁰Department of Neurosurgery, Oregon Health & Science University, Portland, Oregon, USA; ¹¹Department of Otolaryngology, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA; ¹²Department of Otolaryngology/Head and Neck Surgery at the University of North Carolina, Chapel Hill, North Carolina, USA; ¹³Department of Neurosurgery, Froedtert and the Medical College of Wisconsin, Milwaukee, Wisconsin, USA; ¹⁴Department of Otolaryngology-Head and Neck Surgery, Oregon Health & Science University, Portland, Oregon, USA

(S157) ASSESSING RADIOGRAPHIC PREDICTORS OF ORBITAL RECURRENCE IN OLFACTORY NEUROBLASTOMA: A NOVEL GRADING SYSTEM FOR ORBITAL INVOLVEMENT
Jeffrey P Graves, MS¹; Megan M Bauman, MS¹; Ehiremen M Iyoha, MD²; Travis J Haller, MD²; Brennan G Olson, MD, PhD²; Maria Peris Celda, MD, PhD³; Carlos D Pinheiro Neto, MD, PhD²; Michael J Link, MD³; Eric J Moore, MD²; David M Routman, MD⁴; Darya P Shlapak, MD⁵; David R DeLone, MD⁵; Lilly H Wagner, MD⁶; Jamie J Van Gompel, MD³; Janalee K Stokken, MD²; ¹Mayo Clinic Alix School of Medicine; ²Department of Otolaryngology-Head and Neck Surgery, Mayo Clinic; ³Department of Neurologic Surgery, Mayo Clinic; ⁴Department of Radiation Oncology, Mayo Clinic; ⁵Division of Neuroradiology, Department of Radiology, Mayo Clinic; ⁶Department of Ophthalmology, Mayo Clinic

(S158) TREATMENT STRATEGIES FOR RECURRENT OLFACTORY NEUROBLASTOMA
Jason R Crossley, MD; Garret W Choby, MD; Eric W Wang, MD; Georgios A Zenonos, MD; Paul A Gardner, MD; Carl H Snyderman, MD; University of Pittsburgh Medical Center

(S159) LUTATHERA THERAPY IN OLFACTORY NEUROBLASTOMA
Carl H Snyderman, MD, MBA¹; Ashok Muthukrishnan, MD¹; Matthew Lechner, MD²; Dominiek Monserez, MD³; Matheus Sewastjanow-Silva, MD⁴; Ehab Y Hanna, MD⁴; Shirley Y Su, MD⁴; ¹University of Pittsburgh Medical Center; ²University College London; ³Erasmus University Rotterdam; ⁴MD Anderson Cancer Center

 

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(V041) ENDOSCOPIC ENDONASAL TRANSCLIVAL AND BILATERAL TRANSCONDYLAR APPROACHES FOR CLIVAL CHORDOMA
Panayiotis E Pelargos, MD¹; Rupen Desai, MD²; Abdurrahman F Kharbat, MD¹; Xiaochun Zhao, MD¹; Avigeet Gupta, MD¹; Edward El Rassi, MD¹; Ian Dunn, MD¹; ¹University of Oklahoma; ²Madison College of Wisconsin

(V042) TRANSLACERUM-TRANSCAVERNOUS ENDOSCOPIC ENDONASAL APPROACH FOR RESECTION OF MULTICOMPARTIMENTAL SKULL BASE CHONDROSARCOMA
Rafael Martinez-Perez; Geisinger Medical Center

(V043) ULTRASOUND-ASSISTED TRANSCLIVAL RESECTION OF CLIVAL CHORDOMA WITH INTRADURAL EXTENSION: A 2-DIMENSIONAL OPERATIVE VIDEO
Guilherme Mansur, MD; Moataz D Abouammo, MD, Msc; Rodrigo Gehrke, MD; Chandrima Biswas, MD; Ricardo L Carrau, MD; Daniel M Prevedello, MD; The Ohio State University

(V044) ENDOSCOPIC ENDONASAL TRANSPTERYGOID TRANSPETROSAL TRANSCAVERNOUS APPROACH TO LARGE PETROCLIVAL CHONDROSARCOMA
Mehdi Khaleghi; Lucas P Carlstrom; Claudio Callejas; Jonathan Thanksrivimol; Ricardo Carrau; Daniel M Prevedello; Ohio State University, Wexner Medical Center

(V045) ENDOSCOPIC ENDONASAL TRANSPTERYGOID TRANSCAVERNOUS RESECTION OF AN UPPER CLIVAL CHONDROSARCOMA
Prakash Nair, MchNeurosurgery; Gowtham M; Akhilesh Gowda; Niroop BS; Sree Chitra Tirunal Institute for Medical science and Technology, Trivandrum, Kerala,India

(V046) EXTENDED MIDDLE FOSSA APPROACH FOR A RECURRENT CLIVAL CHORDOMA
Yuhei Sangatsuda, MD; Vera Vigo, MD, PhD; Enrico Gambatesa, MD; Christine K Lee, MD, PhD; Yuanzhi Xu, MD; Alix Bex, MD; Juan Carlos Fernandez-Miranda; Stanford University

(V047) EXTREME POSTEROLATERAL APPROACH FOR RESECTION OF A LARGE CRANIOVERTEBRAL JUNCTION CHORDOMA
Thibault Passeri, Dr; Sébastien Froelich, Pr; Department of Neurosurgery, Lariboisière Hospital, APHP

(V048) MINI INVASIVE ENDOSCOPIC ENDONASAL TRANSCLIVAL APPROACH FOR CLIVAL CHORDOMA WITH MUCOSA SUTURING
Thibault Passeri, MD; Trung Hai Vu, MD; Sébastien Froelich, MD; Department of Neurosurgery, Lariboisière Hospital, APHP

 

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(S161) SURGICAL RESECTION FOR MICROPROLACTINOMAS AFTER FAILED MEDICAL MANAGEMENT: AN INTERNATIONAL MULTI-INSTITUTIONAL SERIES
Danielle Golub, MD, MSCI¹; Timothy G White, MD¹; Harshal A Shah, BS¹; Mehdi Khaleghi, MD¹; Kristin M Huntoon, DO²; Ingrid M Zandbergen, MD³; Leontine E Bakker, MD³; Luma M Ghalib, MD²; Iris C Pelsma, MS³; Ehsan Dowlati, MD, MS¹; Mark B Chaskes, MD¹; Judd H Fastenberg, MD¹; Marco J Verstegen, MD³; Nienke R Biermasz, MD, PhD³; Daniel M Prevedello, MD²; Amir R Dehdashti, MD¹; ¹Northwell Health; ²Wexner Medical Center, The Ohio State University; ³Leiden University Medical Center

(S162) A CONVOLUTIONAL NEURAL NETWORK MODEL FOR THE PREDICTION OF PROLACTINOMA RESPONSE TO DOPAMINE AGONISTS
Youssef M Zohdy; Leonardo Tariciotti; Justin Maldonado; Alejandra Rodas; Silvia Vergara; J. Manuel Revuelta Barbero; Samir Lohana; Biren K Patel; Megan Cosgrove; Erion De Andrade; Gustavo Pradilla; Tomas Garzon-Muvdi; Emory University

(S164) EXAMINING THE VIABILITY OF ENDOSCOPIC ENDONASAL SURGERY AS AN EARLY TREATMENT STRATEGY FOR MACROPROLACTINOMAS: THE SIGNIFICANCE OF THE HIGHEST PREOPERATIVE PROLACTIN LEVEL IN PREDICTING LONG-TERM SURGICAL OUTCOMES
Mehdi Khaleghi, MD¹; Kristin Huntoon¹; Ingrid Zandbergen²; Timothy White³; Leontine Bakker⁴; Marco Verstegen⁴; Luma Ghalib⁵; Iris Pelsma⁴; Danielle Golub³; Alexander Kuffer³; Amir Dehdashti³; Nienke Biermasz²; Daniel M Prevedello⁵; ¹Department of Neurosurgery, Wexner Medical Center, The Ohio State University Columbus, Ohio, USA; ²Department of Neurosurgery, Center for Endocrine Tumours Leiden, Leiden University Medical Center, Leiden, the Netherlands; ³Department of Neurosurgery, Hofstra University Northwell Health, Long Island, NY, USA; ⁴Department of Medicine, Division of Endocrinology, Center for Endocrine Tumours Leiden, Leiden University Medical Center, Leiden, the Netherlands; ⁵Department of Endocrinology, Wexner Medical Center, The Ohio State University Columbus, Ohio, USA

(S165) EFFECT OF PREOPERATIVE MEDICAL TREATMENT ON TUMOR FIBROSIS AND SURGICAL OUTCOMES IN PROLACTINOMAS
Vladimir A Ljubimov, MD; Taishi Nakase, MS; Julia J Chang, MD; Hannes Vogel, MD; Vera Vigo, MD; Juan C Fernandez-Miranda, MD; Stanford University

(S167) INCIDENCE OF RADIOLOGIC EVIDENCE OF SINUSITIS FOLLOWING ENDOSCOPIC PITUITARY SURGERY; A MULTI-CENTER STUDY
Dan Yaniv¹; Stephanie Flukes²; Nir Livneh³; Igor Vainer¹; Ethan Soudry¹; Nimrod Amitai¹; Daniel Spielman²; Marc Cohen²; Aviram Mizrachi¹; ¹Department of Otolaryngology - Head and Neck Surgery, Rabin Medical Center, Petah Tikva and Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel; ²Head and Neck Service, Department of Surgery, Memorial Sloan-Kettering Cancer Center, New York, NY, USA; ³Department of Otolaryngology - Head and Neck Surgery, Sheba Medical Center, Tel Hashomer, Israel

(S168) MEDICATION VERSUS EARLY SURGERY IN PROLACTINOMAS WITH VISUAL INVOLVEMENT: TIME FOR RANDOMIZED CONTROLLED TRIALS
Adam Z Levitan, BSc¹; Megan Laing²; Hannah Liu¹; Zummana Ahsan¹; Janissardhar Skulsampaopol, MD³; Jeannette Goguen, MD, MEd¹; John Lee, MD, FRCSC, MSc¹; Jennifer Anderson, MD, FRCSC, MSc¹; Irene Vanek, MD, FRCPC⁴; Michael D Cusimano, MD, MHPE, PhD, FRCS, DABNS, FACS¹; ¹University of Toronto; ²McMaster University; ³Mahidol University; ⁴St. Michael's Hospital

(S169) CLINICAL AND IMAGING FINDINGS SUGGEST CLONAL RESISTANCE TO DOPAMINE AGONIST THERAPY IN A SUBSET OF MEDICALLY REFRACTORY PROLACTINOMAS
David Peters, MD; Yuki Shinya; Jamie Van Gompel; Mayo Clinic

 

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(V049) COMBINED PETROSAL APPROACH WITH TRANSCOCHLEAR EXTENSION FOR FISCH D JUGULAR PARAGANGLIOMA: A TECHNICAL CASE REPORT
Erion J de Andrade; Biren Patel; Manuel Revuelta; Gustavo Pradilla; Emory University

(V050) COMBINED PETROSECTOMY, TRANS ZYGOMATIC APPROACH, AND FACIAL NERVE DECOMPRESSION FOR RESECTION OF A GIANT ANEURYSMAL BONE CYST IN A 5-YEAR-OLD PATIENT
Wesley Shoap, MD¹; Ayment Kabir, BS²; Maximiliano Nunez, MD³; Jeffrey Sharon, MD⁴; Ivan El-Sayed, MD⁴; Ezequiel Goldschmidt, MD, PhD⁵; ¹LSU New Orleans School of Medicine Department of Neurosurgery; ²University of California San Francisco School of Medicine; ³Stanford University School of Medicine Department of Neurosurgery; ⁴University of California San Francisco School of Medicine Department of Otorhinolaryngology; ⁵University of California San Francisco School of Medicine Department of Neurosurgery

(V051) MINIMALLY INVASIVE APPROACH TO INTRACRANIAL NASAL DERMOIDS WITH INTRACRANIAL EXTENSION VIA ENDOSCOPIC AND MODIFIED RHINOPLASTY APPROACH
Travis J Clarke, MD¹; Jeffery May, MD¹; Nina Gallo, MD¹; Sanjeet Rangarajan, MD²; Anas Eid, MD¹; ¹University of Tennessee Health Science Center - Memphis; ²University Hospitals Otolaryngology

(V052) PERFORMING AN ENDOSCOPIC UNILATERAL ANTERIOR CRANIOFACIAL RESECTION AND ORBITAL DECOMPRESSION IN PATIENT WITH A FRONTOETHMOID JUVENILE PSAMMOMATOID OSSIFYING FIBROMA AND ANEURYSMAL BONE CYST
Zechariah G Franks¹; Juan Fernandez-Miranda, MD²; Peter Hwang, MD²; ¹Mayo Clinic Florida; ²Stanford University

(V053) COMBINED MICROSCOPIC-ENDOSCOPIC RETROSIGMOID APPROACH TO INFRA- & SUPRATENTORIAL POSTERIOR FOSSA EPIDERMOID TUMOR
Mehdi Khaleghi, MD; Adnan Hussain Shahid, MBBS, MS, MCh; Ursula Hummel, MHS, PAC; Jai D Thakur, MD, FAANS; University of South Alabama

(V054) TRIGEMINAL V2 SCHWANNOMA - STAGED ENDONASAL ENDONASAL AND ENDOSCOPIC TRANS-ORBITAL TUMOR RESECTION
M. Salman Ali, MD; Camilo Reyes, MD; Kenneth Byrd, MD; Fernando Vale, MD; Medical College of Georgia at Augusta University

(V055) EXPANDED ENDOSCOPIC ENDONASAL APPROACH FOR SKULL BASE CHORDOMA RESECTION - PERSPECTIVE FROM NEW SKULL BASE FACULTY
M. Salman Ali, MD; Kenneth Byrd, MD; Fernando Vale, MD; Medical College of Georgia at Augusta University

(V056) COMBINED EXTENDED MIDDLE CRANIAL FOSSA AND RETROSIGMOID APPROACHES FOR A LARGE POSTERIOR FOSSA EPIDERMOID
Robert J Macielak, MD; Lucas P Carlstrom, MD, PhD; Daniel M Prevedello, MD, MBA; Oliver F Adunka, MD, MBA; The Ohio State University Wexner Medical Center

 

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(S170) TECHNICAL ADVANCEMENTS IN HEARING PRESERVATION IN VESTIBULAR SCHWANNOMA SURGERY
Cordula Matthies, PhD¹; Robert Nickl, MD¹; Andreas Schmidt¹; Matthias Scheich, PhD²; Maria Breun, PhD¹; ¹Department of Neurosurgery; ²Department of ORL

(S171) A MULTIDISCIPLINARY EXPERIENCE OF VESTIBULAR SCHWANNOMA SURGERY OVER 12 YEARS: ANALYSIS OF FACIAL NERVE AND HEARING OUTCOMES AND THE SIGNIFICANCE OF PREOPERATIVE RADIOLOGIC FEATURES
Mehdi Khaleghi; Kyle C Wu; Bilal Mohammad Alsavaf; Vivian Kaul; Lucas P Carlstrom; Robert Maceilak; Luciano Prevedello; Oliver F Adunka; Daniel M Prevedello; Ohio State University, Wexner Medical Center

(S172) PREDICTING RISK FACTORS FOR FACIAL NERVE SACRIFICE DURING TEMPORAL BONE RESECTION FOR LATERAL SKULL BASE MALIGNANCIES
Roberto M Soriano, MD; Alejandra Rodas, MD; Michael Baddour, MD; David Chou, MD; C. Arturo Solares, MD; Emory University

(S173) FACIAL REANIMATION AFTER TEMPORAL BONE RESECTION WITH FACIAL NERVE SACRIFICE FOR SKULL BASE TUMORS: RESTORING FUNCTION AND SYMMETRY
Roberto M Soriano, MD; Alejandra Rodas, MD; David Chou, MD; Gustavo Pradilla, MD; C. Arturo Solares, MD, FACS; Michael Baddour, MD; Emory University

(S174) IDENTIFYING SURGICAL PHENOTYPES OF A MASTOIDECTOMY USING UNSUPERVISED CLUSTERING
Oren Wei, BS¹; Andy S Ding, MD, MSE²; Nimesh Nagururu, MSE¹; Adnan Munawar, PhD³; Manish Sahu, PhD³; Russell H Taylor, PhD³; Francis X Creighton, MD²; ¹Johns Hopkins School of Medicine; ²Department of Otolaryngology - Head and Neck Surgery, Johns Hopkins; ³Department of Computer Science, Johns Hopkins University

(S175) CHARACTERIZING RATES OF POSTOPERATIVE HYDROCEPHALUS AFTER VESTIBULAR SCHWANNOMA RESECTION
Emily Chapman, MD; Alex Devarajan; Jack Y Zhang; Emery Monnig; Akhil Rao; Mehek Dedhia; Raj K Shrivastava, MD; ISMMS

(S176) HOW BEST TO TREAT MEDIUM SIZED VESTIBULAR SCHWANNOMAS: RADIOSURGERY VERSUS SURGICAL RESECTION FOR 2 TO 2.5CM TUMORS
Emery Monnig; Alex Devarajan; Yehia Elkersh; Megan Tang; Jack Zhang; Rui Feng; Joshua Bederson; Raj Shrivastava; Icahn School of Medicine

(S177) EVALUATION OF THE SAFETY OF TUMOR REMOVAL WITH CAPSULAR SPARING IN SCHWANNOMAS
Kentaro Watanabe, PhD; The Jikei UNiversity School of Medicine

(S179) VESTIBULAR SCHWANNOMA MANAGEMENT IN THE 21ST CENTUTRY - EMOTIONAL AND OTHER INVESTMENTS IN DECISION MAKING?
Shakeel Saeed, Professor; University College London Ear Institute

 

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(V057) ENDOSCOPIC ENDONASAL C1-C2 SPINAL CORD DECOMPRESSION
Peter Kwak, MD¹; Srihari Daggumati, MD²; Lawrance Lee, MD¹; Harsh Shah, MD³; Anil Roy, MD³; ¹Department of Otolaryngology - Head and Neck Surgery, Virginia Commonwealth University; ²Department of Otolaryngology - Head and Neck Surgery, Thomas Jefferson University; ³Department of Neurosurgery, Virginia Commonwealth University

(V058) EXTREME LATERAL APPROACH FOR FORAMEN MAGNUM NEUROENTERIC CYST
Dilan Ozaydin, MD; Vera Vigo, MD, PhD; Christine K Lee, MD, PhD; Yuanzhi Xu, MD; Juan Carlos Fernandez-Miranda; Stanford University

(V059) ENDOSCOPIC ENDONASAL TRANSCLIVAL APPROACH FOR PONTINE TUMOR RESECTION
M. Salman Ali; Kenneth Byrd, MD; Fernando Vale, MD; Medical College of Georgia at Augusta University

(V060) ENDONASAL ANTERIOR C1 ARCH REMOVAL, ODONTOIDECTOMY, AND INFERIOR CLIVUSECTOMY FOR CERVICOMEDULLARY STENOSIS
Juan Pablo Navarro Garcia de Llano¹; Maria Guevera, MD²; J. Emiliano Sanchez-Garavito, MD¹; Krishnan Ravindran, MD¹; Angela M Donaldson, MD¹; Ian A Buchanan¹; Kaisorn L Chaichana, MD¹; Joao Paulo Cavalcante de Almeida, MD¹; ¹Mayo Clinic Florida; ²Hospital El Cruce - Nestor Kirchner

(V061) IS NASO-AXIAL LINE A BETTER PREDICTOR IN ENDOSCOPIC ENDONASAL RESECTION OF THE ODONTOID AND PANNUS REMOVAL? TECHNICAL NUANCES OF MAXIMIZING CORRIDOR AND MAINTAINING OCCIPITAL CERVICAL JOINT STABILITY
Adnan H Shahid, MBBS, MS, MCh; Sudhir Suggala, MBBS, MS, MCh; Danner Butler, BS; Ursula Hummel, MHS, PAC; Mark Gacek, MD; Richard Menger, MD, MPA; Jai D Thakur, MD, FAANS; University of South Alabama Mobile

(V062) EXTENDED ENDOSCOPIC ENDONASAL APPROACH WITH ODONTOIDECTOMY IN A PATIENT PRESENTING WITH UNSTABLE PATHOLOGICAL TYPE 2 FRACTURE, RETROPHARYNGEAL ABSCESS, AND CERVICAL-MEDULLARY COMPRESSION
Adnan H Shahid, MBBS, MS, MCh; Mehdi Khaleghi, MD; Sudhir Suggala, MBBS, MS, MCh; Danner Butler; Garrett Dyess; Urusla Hummel; Manvinder Suden; Mark Gacek, MD; Richard Menger, MD, MPA; Jai D Thakur, MD; University of South Alabama Mobile

(V064) SUBTEMPORAL PREAURICULAR INFRATEMPORAL APPROACH WITH CONDYLAR FOSSA OSTEOTOMY FOR RESECTION OF SKULL BASE CHONDROSARCOMA
David CH Tan, MBBS, FRACS; Celine Hounjet, MD; Michael Rizzuto, MD; Serge Makarenko, MD, FRCSC; Ryojo Akagami, MD, BSc, MHSc, FRCSC; University of British Columbia & Vancouver General Hospital

 

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(S180) POSTOPERATIVE RADIOTHERAPY PROVIDES ADDITIVE PROGRESSION-FREE SURVIVAL BENEFIT IN ATYPICAL MENINGIOMAS EVEN AFTER GROSS TOTAL RESECTION
Umberto Tosi; Marialaura Simonetto, MD; Alexandra Giantini-Larsen, MD; Rohan Ramakrishna; Philip Stieg, MD, PhD; Theodore H Schwartz; Weill Cornell Medicine

(S181) SURGICAL MANAGEMENT OF SPONTANEOUS LATERAL CEREBROSPINAL FLUID LEAKS AND ENCEPHALOCELES: A SYSTEMATIC REVIEW AND META-ANALYSIS
Akash M Bhat¹; Alejandro R Marrero-Gonzalez²; Shaun A Nguyen, MD, FAPCR³; Robert F Labadie, MD, PhD³; Ted A Meyer, MD, PhD³; ¹Drexel University College of Medicine; ²University of Puerto Rico School of Medicine; ³Medical University of South Carolina

(S182) ESTABLISHMENT OF A CRANIAL DISSECTION CURRICULUM FOR JUNIOR NEUROSURGICAL RESIDENTS: A PILOT STUDY
Alankrita Raghavan, MD; Kennedy Carpenter, MD; Jordan Hatfield; Caroline Folz; Michael Haglund; Steven Cook, MD; Katherine McDaniel; Duke University Hospital

(S183) A NOVEL AUGMENTED REALITY NAVIGATION SYSTEM FOR TRIGEMINAL RHIZOTOMY
Travis Hamilton, MD; Tarek Mansour, MD; Edvin Telemi, MD; Heegook Yeo, MD; Lisa Scarpace, PhD; Ghaus Malik, MD; Jack Rock, MD; Henry Ford Health

(S184) LARGER TUMOR VOLUME ASSOCIATED WITH LOWER TUMOR SHRINKAGE FOLLOWING GAMMA KNIFE RADIOSURGERY FOR INCIDENTAL MENINGIOMAS
Tianqi Xiao, BS¹; Anish Kosanam, BS¹; Roger Murayi, MD²; Wei Wei, MS²; Varun R Kshettry, MD²; Pablo F Recinos, MD²; ¹Case Western Reserve University School of Medicine; ²Cleveland Clinic Rose Ella Burkhardt Brain Tumor & Neuro-Oncology Center

(S185) EFFECT OF PRIOR BOTULINUM TOXIN A TREATMENT ON PERSISTENCE AND RECURRENCE OF HEMIFACIAL SPASM FOLLOWING MICROVASCULAR DECOMPRESSION SURGERY
Guilherme Finger, MD, MS; Alyson L Kishi, BA; Sruti S Akella, MD; Daniel M Prevedello, MD; The Ohio State University

(S186) PROSPECTIVE EVALUATION OF SKULL BASE RECONSTRUCTION ENHANCEMENT PATTERNS, SURGICAL REPAIR TECHNIQUES, AND ASSOCIATION WITH CEREBROSPINAL FLUID LEAK
Jakob Fischer; Sara K Yang, MD; Melodyanne Y Cheng, MS; Noriko Salamon, MD, PhD; Marvin Bergsneider, MD; Won Kim, MD; Jeffrey D Suh, MD; Daniel M Beswick, MD; Jivianne T Lee, MD; Marilene B Wang, MD; University of California, Los Angeles (UCLA)

(S187) PIONEERING INSIGHTS INTO MICROSURGICAL CLIPPING OF POSTERIOR COMMUNICATING ARTERY ANEURYSMS THROUGH ANTERIOR CLINOIDECTOMY: 3D VOLUMETRY AND GALLIUM CASTING TECHNIQUE, A NEW PERSPECTIVE
Diego S Morales Roccuzzo¹; Lena Marie Houlihan, MD, PHD²; Shadi Bsat¹; Mohammadmahdi Sabahi¹; David Naughton²; Ryan Gordon¹; Hamid Borghei-Razavi¹; Badih Adada¹; ¹Cleveland Clinic Florida; ²Beaumont Hospital, Dublin, Ireland

 

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(V065) MICROVASCULAR DECOMPRESSION FOR HEMIFACIAL SPASM CAUSED BY DOLICHOECTATIC VERTEBRAL ARTERY
Adel Azghadi, MD; Marte Close-van Keulen, MD; Sepideh Amin-Hanjani, MD; University Hospitals Cleveland Medical Center/ Case Western Reserve University

(V066) MICROSURGICAL TREATMENT OF A RECURRENT TENTORIAL DURAL ARTERIOVENOUS FISTULA FOLLOWING ENDOVASCULAR EMBOLIZATION WITH SKELETONIZATION OF THE DURAL VENOUS SINUSES
Sean M Himel, MD; Taylor Orr, MD; John Dugan, BS; Mustafa Motiwala, MD; Nick Khan, MD, FAANS; University of Tennessee Health Science Center

(V067) REAL-TIME, QUANTITATIVE, AND FUNCTIONAL MONITORING OF ABDUCENS NERVE BY INTRAOPERATIVE REPETITIVE DIRECT STIMULATION IN CEREBELLOPONTINE ANGLE EPIDERMOID CYST SURGERY
Ken Matsushima, MD, PhD; Michihiro Kohno, MD, PhD; Tokyo Medical University

(V068) MICROSURGICAL RESECTION OF A VERMIAN HEMANGIOBLASTOMA UTILIZING THE PARIETOOCCIPITAL INTERHEMISPHERIC PRECUNEAL TRANSTENTORIAL APPROACH
Ryan M Naylor, MD, PhD; Giuseppe Lanzino, MD; Mayo Clinic

(V069) OCCIPITAL TRANSTENTORIAL APPROACH FOR RESECTION OF PAPILLARY TUMOR OF PINEAL REGION: 2-DIMENSIONAL OPERATIVE VIDEO
Carter M Suryadevara, MD; Albert Liu, MD; Karenna J Groff; Donato Pacione, MD; NYU Langone Health

(V070) MICROSURGICAL RESECTION OF TYPE 1 CLINOIDAL MENINGIOMA THROUGH AN EXTRADURAL MINIPTERIONAL APPROACH
Rafael Martinez-Perez; Geisinger

(V071) MICROVASCULAR DECOMPRESSION IN HYPOGLOSSAL NERVE PALSY: ILLUSTRATIVE SURGICAL VIDEO
Xiaochun Zhao; Abigail York, MD; Christopher Graffeo, MD; University of Oklahoma

(V072) TRANSLABYRINTHINE RESECTION OF COLLISION TUMOURS AND FACIAL NERVE RECONSTRUCTION
Evangelos Drosos, Mr¹; Omar N Pathmanaban, Mr¹; Charlotte Hammerbeck-Ward, Ms¹; Andrew T King, Prof¹; Simon K Lloyd, Prof²; Simon Freeman, Mr²; Fiona McClenaghan, Ms²; Gareth D Evans, Prof³; Scott Rutherford¹; ¹Department of Neurosurgery, Manchester Centre for Clinical Neurosciences, Salford Royal Hospital NHS Foundation Trust, Salford, UK; ²Department of Ears, Nose and Throat, Manchester Centre for Clinical Neurosciences, Salford Royal Hospital NHS Foundation Trust, Salford, UK; ³Manchester Centre for Genomic Medicine, Manchester Academic Health Science Centre, St Mary's Hospital, Manchester University NHS Foundation Trust, Manchester, UK

 

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(S189) COMPARISON OF PRIMARY AND ADJUVANT STEREOTACTIC RADIOSURGERY FOR TREATMENT OF CAVERNOUS SINUS MENINGIOMAS: A META-ANALYSIS
Joshua Caskey, MD¹; Sami Dakhel²; Ayman Khatib²; Jeffrey Turnbull, DO¹; Gabrianna Andrews²; Piotr Domaszewski²; Sara Ragab²; Prashant Kelkar, DO¹; ¹Department of Neurosurgery, Ascension Providence Hospital, Southfield, MI, USA; ²Rowan-Virtua University School of Osteopathic Medicine, Stratford, NJ, USA

(S190) MULTISESSION RADIOSURGERY ALONE FOR TREATMENT OF PRESUMED CRANIAL MENINGIOMAS: 10-YEAR OUTCOMES FROM A SINGLE INSTITUTION PROTOCOL
Akrita Bhatnagar, MD, PhD¹; Michael Carrasquilla, MD¹; Monica P Marin, MD²; Simeng Suy¹; Siviero Agazzi, MD³; Amjad Anaizi, MD⁴; Kevin McGrail, MD⁴; Sean P Collins, MD, PhD⁵; Brian T Collins, MD⁵; Walter C Jean, MD⁶; ¹Department of Radiation Medicine, Georgetown University, Washington, DC.; ²Department of Neurology, Columbia University, New York; ³Department of Neurosurgery and Brain Repair, University of South Florida, Tampa, Florida; ⁴Department of Neurosurgery, Georgetown University, Washington, DC.; ⁵Department of Radiation Oncology, Tampa General Hospital, Florida; ⁶Division of Neurosurgery, Lehigh Valley Fleming Neuroscience Institute, Allentown, Pennsylvania.

(S191) CHARACTERIZATION OF WHITE-MATTER CIRCUIT MECHANISMS OF MULTIMODAL SYMPTOMS OF MENINGIOMA FOR SURGICAL GUIDANCE
Min Jae Kim; Sonia Ajmera, MD; Millie Huang; Ritesh Karsalia; Kristen Park; Om Ghandi; Antonio C Tarbay; Sneha S Mannam; Sawaan Sawaan; John Y Lee, MD; Christina Jackson, MD; Department of Neurosurgery, Perelman School of Medicine, University of Pennsylvania, PA, USA

(S192) MENINGIOMAS CLASSIFIED AS GRADE 2 DUE TO BRAIN INVASION ALONE HAVE BETTER PROGRESSION-FREE SURVIVAL THAN OTHER GRADE 2 MENINGIOMAS
Georgios A Maragkos, MD; Georgios Mantziaris, MD; Carson Brantley, MS; Salem Tos, MBBS; Maria-Beatriz Lopes, MD; Ashok R Asthagiri, MD; University of Virginia

(S194) RADIOGRAPHIC SIGNATURE OF TRAF7 MUTANT MENINGIOMAS
Aymen S Kabir, BA¹; Abraham Dada, BA¹; Rithvik Ramesh, BA¹; Daniel Quintana, BA¹; Christian Jimenez, BS¹; Wesley Shoap, MD²; Robert C Osario, MD³; Ezequiel Goldschmidt, MD, PhD³; ¹School of Medicine, University of California, San Francisco; ²Department of Neurosurgery, Louisiana State University; ³Department of Neurological Surgery, University of California, San Francisco

(S195) EFFECTIVENESS OF THE EXTENDED TRANSSPHENOIDAL APPROACH FOR ANTERIOR SKULL BASE MENINGIOMAS: A SYSTEMATIC REVIEW AND META-ANALYSIS
Lucca B Palavani¹; Lucas Mitre²; Bernardo Nogueira³; Fabiana Honorato⁴; Márcio Yuri Ferreira Ferreira⁵; Carlos Alexandre⁶; Paulo Victor Ribeiro⁷; Isabela Banderali¹; Leonardo de Barros Oliveira⁸; Fernando Gomes⁹; Gisele Lúcia Canto Gomes¹⁰; Raphael Bertani¹¹; José Alberto Landeiro, MD, PhD¹²; ¹Max Planck University Center; ²Faculty of Medicine, Santa Casa de São Paulo School of Medical Sciences, São Paulo, Brazil; ³Serra dos Órgãos University Center, Teresópolis - Rio de Janeiro, Brazil; ⁴Faculty of Medicine, Universidade Nove de Julho, Bauru - São Paulo, Brazil; ⁵Lenox Hill, New York, United States; ⁶Faculty of Medicine, University Ninth of July, São Paulo, Brazil; ⁷Department of Medical Genetics, University of São Paulo, São Paulo, Ribeirão Preto, Brazil; ⁸Department of Neurosurgery, State University of Ponta Grossa, Ponta Grossa, Paraná, Brazil; ⁹Faculty of Medicine, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil; ¹⁰Faculty of Medicine, Federal University of Amazonas, Manaus, Amazonas; ¹¹University of São Paulo, Department of Neurosurgery, São Paulo, SP, Brazil; ¹²Department of Neurosurgery, Federal Fluminense University, Rio de Janeiro, RJ, Brazil

(S196) LONG-TERM OUTCOMES AND COMPLICATION PREDICTION AFTER STEREOTACTIC RADIOSURGERY FOR PREVIOUSLY UNTREATED MENINGIOMAS
Rahul Kumar, MD, PhD¹; Lucas P Carlstrom, MD, PhD²; Ramin A Morshed, MD³; Paul D Brown, MD¹; Christopher S Graffeo, MD⁴; Michael J Link, MD¹; Bruce E Pollock, MD¹; ¹Mayo Clinic, Rochester, MN, USA; ²Southern California Kaiser Permanente Medical Group, San Diego, California, USA; ³University of San Francisco, San Francisco, CA, USA; ⁴University of Oklahoma, Oklahoma City, OK, USA

(S197) MOLECULAR LANDSCAPE AND CLINICAL CORRELATES OF OLFACTORY GROOVE MENINGIOMAS: A MULTI-INSTITUTIONAL STUDY
M Alkhatib¹; L Hua²; F Beyer¹; D Podlesek¹; I Prilop¹; S Jeyaretna³; S Fujio⁴; M Teo⁵; A Zolal¹; L Günther¹; O Behl¹; B Cicek¹; S Herold⁶; J.H Juratli¹; D.P Cahill⁷; H Wakimoto⁷; Y Gong²; T Pinzer¹; G Schackert¹; I.Y Eyüpoglu¹; P.K Brastianos⁸; T Juratli¹; ¹Department of Neurosurgery, Carl Gustav Carus University Hospital, TU Dresden, Dresden, Deutschland; ²Department of Neurosurgery, Huashan University Hospital, Fudan University, Shanghai, China; ³Department of Neurosurgery, Oxford University Hospitals, Oxford, UK; ⁴Department of Neurosurgery, Kagoshima University Hopsital, Kagoshima, Japan; ⁵Department of Neurosurgery, Bristol Institute of Clinical Neuroscience, Southmead Hospital, Bristol, UK; ⁶Institute of Pathology, Carl Gustav Carus University Hospital, TU Dresden, Dresden, Deutschland; ⁷Department of Neurosurgery, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts.; ⁸Department of Medicine, Massachusetts General Hospital Cancer Center, Harvard Medical School, Boston, Massachusetts

(S198) SURGICAL TECHNIQUE FOR VTH AND VI NERVE PRESERVATION IN RESECTION OF MENINGIOMAS ARISING AT THE CLIVUS AND PETROUS APEX
Soichi Oya, MD¹; Shunya Hanakita, MD²; Masanori Aihara, MD¹; Rei Yamaguchi¹; Masahiko Tosaka, MD¹; ¹Gunma University Graduate School of Medicine; ²Saitama Medical Center/University

 

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(S200) OPERATIVE APPROACHES TO C2 SCHWANNOMAS
Petr Vachata, PhD; Jan Lodin; Martin Sames, PhD; Dpt of Neurosurgery Masaryk Hospital UJEP

(S201) COMPARATIVE CADAVERIC STUDY AND ANATOMICAL LIMITATIONS OF THE NASOFRONTAL TREPHINATION- A NOVEL ENDOSCOPIC CORRIDOR FOR ENHANCED EXPOSURE OF THE ODONTOID AND OCCIPITAL CONDYLE REGIONS
Mohammad Bilal Alsavaf, MD¹; Moataz D. Abouammo, MD, MSc²; Jaskaran Singh Gosal, MCh³; Maithrea S. Narayanan, MD⁴; Govind S. Bhuskute, MS⁵; Chandrima Biswas, MD⁶; Guilherme Mansur, MD⁶; Kyle K. VanKoevering, MD⁷; Kyle C. Wu, MD⁶; Daniel M. Prevedello, MD, MBA¹; Ricardo Carrau, MD, MBA¹; ¹Departments of Neurological Surgery and Otolaryngology-Head & Neck Surgery, The James Cancer Hospital at the Wexner Medical Center of The Ohio State University College of Medicine, Columbus, Ohio; ²Department of Otorhinolaryngology-Head and Neck Surgery, Tanta University, Tanta, Egypt; ³Department of Neurosurgery, All India Institute of Medical Sciences (AIIMS), Jodhpur, Rajasthan, India 342005; ⁴Department of Otolaryngology, Hospital Raja Permaisuri Bainun, Ipoh, Perak, Malaysia; ⁵Department of ENT, All India Institute of Medical Sciences, Patna, Bihar, India; ⁶Department of Neurological Surgery, Wexner Medical Center at The Ohio State University, Columbus, Ohio, USA; ⁷Department of Otolaryngology-Head and Neck Surgery, Wexner Medical Center at The Ohio State University, Columbus, Ohio, USA

(S202) NATURAL HISTORY OF BRAINSTEM CAVERNOUS MALFORMATIONS: A SYSTEMATIC REVIEW AND META-ANALYSIS
Brandon M Edelbach, BS¹; Ahmad K AlMekkawi, MD²; Adnan Shaik, BS³; Rekha P Swamy, BS³; Emily He, BS³; Karl R Abia-ad, MD⁴; Ryan A Hess, MD⁵; James P Caruso, MD⁶; Carlos A Bagley, MD, MBA²; Tarek Y El Ahmadieh, MD¹; Yifei Duan, MD²; Jonathan D Breshears, MD²; ¹Loma Linda University Department of Neurosurgery; ²Saint Luke's Marion Bloch Neuroscience Institute Department of Neurosurgery; ³Univeristy of Missouri-Kansas City School of Medicine; ⁴SUNY Upstate Medical Center, Department of General Surgery; ⁵The University of Texas Southwestern Department of Plastic Surgery; ⁶The University of Texas Southwestern Department of Neurosurgery

(S203) SURGICAL ANATOMY OF THE FAR LATERAL APPROACH WITH SUPRACONDYLAR AND TRANSCONDYLAR VARIATIONS: ANALYSIS OF ACCESS TO THE CRANIOCERVICAL JUNCTION
Alessandro De Bonis, MD; Megan M.J. Bauman, MS; Luciano César P.C. Leonel, PhD; Michael Link, MD; Maria Peris-Celda, MD, PhD; Mayo Clinic

(S204) THE ROLE OF DTI IN SURGICAL MANAGEMENT OF BRAINSTEM CAVERNOUS MALFORMATIONS: A META-ANALYSIS OF 4,159 CASES
Brandon M Edelbach, BS¹; Ahmad K AlMekkawi, MD²; Ananya Sharma, BS³; Nikitha Sheth, BS³; Paras Shah, BS³; Eshanika Manchanda, BS³; Carlos A Bagley, MD, MBA²; Jonathan D Breshears, MD²; Yifei Duan, MD²; ¹Loma Linda Univeristy School of Medicine; ²Saint Luke's Marion Bloch Neuroscience Institute Department of Neurosurgery; ³Univeristy of Missouri-Kansas City School of Medicine

(S205) ENDOSCOPIC TOTAL ODONTOIDECTOMY WITH PRESERVATION OF C1 ANTERIOR ARCH THROUGH THE CONTRALATERAL NASOFRONTAL TREPHINATION TECHNIQUE: A CADAVERIC STUDY WITH QUANTITATIVE ANALYSIS.
Moataz D Abouammo, MD, MSc¹; Maithrea S Narayanan, MBBS, MMED²; Mohammad Bilal Alsavaf, MD¹; Simona Serioli, MD³; Jimmy Qiu, MASc⁴; Chandrima Biswas, MD⁵; Guilherme Mansur, MD⁵; Noha E Shalaby, MD, MSc⁶; Mohamed Ammo, PharmB⁷; Kyle C Wu, MD⁵; Kyle K VanKoevering, MD¹; Francesco Doglietto, MD, PhD⁸; Daniel M Prevedello, MD, MBA⁵; Ricardo L Carrau, MD, MBA¹; ¹Department of Otolaryngology-Head and Neck Surgery, The Ohio State University Wexner Medical Center, Columbus, Ohio, USA; ²Department of Otolaryngology and Head-Neck Surgery, Hospital Kuala Lumpur, Jalan Pahang 50586 Kuala Lumpur, Wilayah Persekutuan Kuala Lumpur, Malaysia; ³Division of Neurosurgery, Department of Medical and Surgical Specialties, Radiological Sciences, and Public Health, Spedali Civili of Brescia, University of Brescia, Brescia, Italy; ⁴TECHNA Institute, University Health Network, Toronto, Ontario, Canada; ⁵Department of Neurological Surgery, The Ohio State University Wexner Medical Center, Columbus, Ohio, USA; ⁶Faculty of Medicine, Tanta University, Tanta, Egypt; ⁷The University of Western Ontario; ⁸Department of Neurosurgery, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, 00168 Rome, Italy

(S206) QUANTITATIVE COMPARISON OF ENDOSCOPIC APPROACHES TO THE PARAMEDIAN SKULL BASE: A PRECLINICAL STUDY.
Simona Serioli, MD¹; Riccardo Brancaleone, MD²; Jimmy Qiu³; Mario Rigante, MD²; Vincenzo Arena, MD²; Liverana Lauretti, MD²; Pierpaolo Mattogno, MD, PhD²; Alessandro Olivi, MD²; Francesco Doglietto, MD, PhD²; ¹University of Brescia, Italy; ²Università del Sacro Cuore, Fondazione Policlinico Gemelli, Rome, Italy; ³Techna Institute, University Health Network, Toronto, ON, Canada

(S207) STEP-BY-STEP ANATOMICAL DISSECTION OF THE PTERIONAL TRANSSYLVIAN APPROACH FOR ACCESSING VENTRAL SUPERIOR PONTINE LESIONS
Serdar Rahmanov, MD; Mohammadmahdi Sabahi, MD; Abdulrahman Albakr; Badih Adada; Hamid Borghei-Razavi; Cleveland Clinic Florida

 

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(V073) EXPANDED ENDONASAL ENDOSCOPIC APPROACH TO COMPLEX PAEDIATRIC CSF LEAK REPAIR
Warren Bennett, MD, MA, FRCS¹; William Singleton, MD, MA, PhD, FRCS²; Mustafa Motiwala, MD³; Mahmoud Y. Asad, MD, FRCS⁴; Kumar Abhinav, MD, FRCS⁴; ¹Department of ENT, University Hospitals Bristol and Weston NHS Foundation Trust; ²Department of Paediatric Neurosurgery, Bristol Royal Children's Hospital; ³Department of Neurosurgery, University of Tennessee Health Science Center; ⁴Department of Neurosurgery, North Bristol Trust

(V074) LATERAL NASAL WALL FLAP FOR ANTERIOR CRANIAL BASE RECONSTRUCTION
Jason R Crossley; Paul A Gardner; Carl H Snyderman; University of Pittsburgh Medical Center

(V075) ANTERIOR TRANSPETROSAL APPROACH FOR RECURRENT PEDIATRIC EPENDYMOMA IN CEREBELLOPONTINE ANGLE
Jillian Plonsker, MD¹; Michael Brandel, MD²; Usman Khan, MD, PhD²; Marc Schwartz, MD²; Rick Friedman, MD, PhD²; Michael Levy, MD, PhD³; ¹Lurie Children's Hospital; ²UC San Diego; ³Rady Children's Hospital

(V076) SPHENOID SINUSITIS WITH INTRACRANIAL EXTENSION MANAGED VIA ENDOSCOPIC ENDONASAL TRANSSPHENOIDAL AND TRANSPTERYGOID APPROACH IN AN 11 YEAR OLD
Nicholas G Candy¹; Alex S Zhang²; Alkis J Psaltis²; Alistair K Jukes¹; Peter-John Wormald²; ¹Royal Adelaide Hospital; ²Queen Elizabeth Hospital

(V077) ENDOSCOPIC CRANIOFACIAL RESECTION OF OLFACTORY NEUROBLASTOMA WITH MINI-OPEN PERICRANIAL FLAP RECONSTRUCTION
Rijul Kshirsagar, MD; Giyarpuram Prashant, MD; Kaiser Permanente Redwood City Medical Center

(V078) ENDOSCOPIC ENDONASAL APPROACH FOR REMOVAL OF AN OLFACTORY GROOVE MENINGIOMA.
Laura-Élisabeth Gosselin, MD; Antonio Strangio, MD; Sylvie Nadeau, MD; Pierre-Olivier Champagne, PhD, MD; Laval University Hospital Centre

(V079) ENDOSCOPIC RESECTION OF EXTENSIVELY CALCIFIED ESTHESIONEUROBLASTOMA
Jason R Crossley, MD¹; Amjad Anaizi, MD²; Timothy R Deklotz, MD²; ¹University of Pittsburgh Medical Center; ²MedStar Georgetown University Hospital

 

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(S208) FLUOROSCENT-GUIDED SURGERY WITH 5-AMINOLEVILINIC ACID FOR MENINGIOMA: A SYSTEMATIC REVIEW AND META-ANALYSIS
Lucca Biolcati Palavani¹; Bernardo Vieira Nogueira, MD²; Gean Carlos Müller³; Hsien-Chung Chen, MD⁴; Vinícius Gonçalves Gomes Pereira, MD⁵; Mariano Belfort Santos⁶; Carlos Alexandre Gomes Farias⁷; Anna Luiza Pereira⁵; Dan Zimelewicz Oberman, MD⁸; Carolina Benjamin, MD, FAANS⁹; ¹Max Planck University Center; ²Serra dos órgãos University Center; ³University of Caxias do Sul; ⁴Taipei Medical University Shuang Ho Hospital; ⁵Rio de Janeiro State University; ⁶Zarns Faculty; ⁷Ninth of July University; ⁸Galeão Air Force Hospital; ⁹University of Miami

(S209) TRENDS AND DISPARITIES IN MENINGIOMA MORTALITY ACROSS METROPOLITAN AREAS IN THE UNITED STATES
Jaskeerat Gujral; Om H Gandhi; Swarith Reddy; Mert Marcel Dagli, MD; Wiliam C Welch, MD; University of Pennsylvania, Philadelphia, Pennsylvania, United States

(S210) PREDICTING WHO GRADE IN MENINGIOMA SURGERY: DEVELOPMENT OF AN UNBIASED VARIABLE SELECTION AND VALIDATION APPROACH USING PREOPERATIVE CLINICAL AND RADIOGRAPHIC DATA
Philip Ostrov, MD¹; Raja N Jani, DO, MHA¹; Maunil Mullick¹; Niraj Rama¹; Amrit Avula²; Arshi Chopra¹; Arinan Dourado, PhD¹; Isaac Abecassis¹; Akshitkumar Mistry¹; Brian J Williams, MD¹; ¹University of Louisville; ²Washington University St. Louis

(S211) INTEGRATED CLINICAL GENETIC ANALYSIS REVEALS NEUROTRANSMITTER RECEPTOR DYSREGULATION IN MENINGIOMAS CAUSING SEIZURE
A. Basit Khan, MD¹; Malcolm F McDonald¹; Akdes Harmanci, PhD¹; Collin English¹; Arif Harmanci, PhD²; Tiemo Klisch, PhD¹; Akash J Patel, MD¹; ¹Baylor College of Medicine; ²UT Health Science Center Houston

(S212) COMPARISON OF TWO SURGICAL APPROACHES AND OUTCOMES FOR PETROCLIVAL MENINGIOMAS: A SINGLE-SURGEON SERIES OF CONSECUTIVE CASES
Salomon Cohen Cohen, MD; Rahul Kumar, MD, PhD; Michael J Link, MD; Mayo Clinic, Rochester MN

(S213) UTILITY AND SAFETY OF PREOPERATIVE FEEDING ARTERIES EMBOLIZATION AND TUMOR EMBOLIZATION FOR SKULL BASE MENINGIOMAS
Hideki Kashiwagi, PhD; Ryo Hiramatsu, PhD; Akihiro Kambara, PhD; Kohei Yoshimura, PhD; Masao Fukumura, PhD; Yuichiro Tsuji, PhD; Gen Futamura, PhD; Ryokichi Yagi, PhD; Masahiro Kameda, PdD; Naosuke Nonoguchi, PhD; Motomasa Furuse, PhD; Shinji Kawabata, PhD; Toshihiro Takami, PhD; Masahiko Wanibuchi, PhD; Osaka Medical and Pharmaceutical University

(S214) NATURAL HISTORY AND SURGICAL OUTCOMES OF SINGLE-CENTRE EXPERIENCE IN MANAGEMENT OF SPHENO-ORBITAL MENINGIOMAS
Catherine Wang, BSc¹; Peter Gooderham, MD²; Ryojo Akagami, MD²; Serge Makarenko, MD²; ¹Faculty of Medicine, University of British Columbia; ²Neurosurgery, University of British Columbia

(S215) MENINGIOMAS CAUSING BONY HYPEROSTOSIS HAVE A MORE SEVERE CLINICAL COURSE
Malcolm F McDonald¹; A. Basit Khan, MD¹; Andrew Chang, MD¹; Collin English¹; Eric A Goethe, MD¹; Sricharan Gopakumar, MD¹; Ali Jalali, MD, PhD¹; Ganesh Rao, MD¹; Arif Harmanci, PhD²; Akdes Harmanci, PhD¹; Tiemo J Klisch, PhD¹; Akash J Patel, MD¹; ¹Baylor College of Medicine; ²UT Health Science Center Houston

(S216) SURGERY OF PERITORCULAR MENINGIOMAS WITH CONSERVATION OF THE SINUS ENDOTHELIAL LAYER: A CASE SERIES AND TECHNICAL NOTE
Anil Can, MD; Anna Brettler; Alice Giotta Lucifero; Ossama Al-Mefty; Brigham and Women's Hospital

 

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(S217) EXTENDED UNILATERAL FRONTAL APPROACH FOR LARGE ANTERIOR SKULL BASE MENINGIOMAS : BETTER CHANCE OF OLFACTION PRESERVATION WITHOUT COMPROMISING THE RESECTION
Pravin Salunke, Prof; PGIMER, Chandigarh, INDIA

(S218) PARASYMPATHETIC INNERVATION OF THE LACRIMAL GLAND: A MICROSURGICAL CADAVER STUDY
Hassan A Fadel, MD; Jacob Pawloski, MD; Karam P Asmaro, MD; Jack Rock, MD; John Craig, MD; Henry Ford Hospital

(S219) DEFINING LANDMARKS IN SKULL BASE SURGERY: A MORPHOMETRIC CADAVERIC STUDY OF THE INTERFALCIFORM LIGAMENT
Guilherme Mansur, MD¹; Guilherme Finger, MD, MSc¹; Dan Z Oberman²; Moataz D Abouammo, MD, MSc¹; Chandrima Biswas, MD¹; Mohammad B Alsavaf, MD¹; Rodrigo Gehrke, MD¹; Kyle C Wu, MD¹; João Paulo Almeida, MD, PhD²; Daniel M Prevedello, MD¹; ¹The Ohio State University; ²Mayo Clinic Florida

(S220) MICROANATOMY OF THE TEMPORAL DIVISION OF THE FACIAL NERVE IN THE PERIORBITAL REGION APPLIED TO MINIMALLY INVASIVE KEYHOLE APPROACHES
Ali Tayebi Meybodi, MD; Ahmet Ozak, MD; Andrea L Castillo, MD; Michael T Lawton, MD; Mark C Preul, MD; Barrow Neurological Institute

(S222) ISOLATED SPHENOID SINUSITIS: FREQUENCY OF SKULL BASE EROSION AND ASSOCIATED COMPLICATIONS
Maria Catalina Espinosa, MD¹; Sanjena Venkatesh, BA²; Alison Yu, MD¹; Jennifer Douglas, MD¹; Nithin Adappa, MD¹; Michael Kohanski, MD, PhD¹; ¹Department of Otorhinolaryngology- Head and Neck Surgery, University of Pennsylvania; ²Perelman School of Medicine at the University of Pennsylvania

(S223) SPHENO-ORBITAL MENINGIOMAS: CASE SERIES AND SURGICAL OUTCOMES FOLLOWING FRONTOTEMPORAL-ORBITOZYGOMATIC CRANIOTOMY
Abdullah H Ishaque, MD, PhD; Michael D Cusimano, MD, PhD; University of Toronto

(S225) SURGICAL TREATMENT OF THIRD VENTRICLE CRANIOPHARYNGIOMAS IN ADULTS
Diego Mazzatenta¹; Matteo Zoli¹; Alessandro Carretta¹; Marcello Magnani¹; Federica Guaraldi²; Giacomo Sollini³; Sofia Asioli¹; Ernesto Pasquini³; ¹University of Bologna; ²IRCCS Istituto delle Scienze Neurologiche di Bologna; ³Azienda USL di Bologna

(S226) COMPLICATIONS IN THE ENDOSCOPIC TRANSORBITAL APPROACH FOR THE MANAGEMENT OF SPHENO-ORBITAL MENINGIOMAS: A SYSTEMATIC REVIEW AND META-ANALYSIS.
Filipe V Ribeiro¹; Lucca Palavani²; Marcelo P Porto Sousa³; Filipi F Andreão³; Márcio Ferreira⁴; Guilherme Garcia⁵; Ary Neto⁶; Laura Montecino⁷; Christian Fukunaga⁸; Helvécio Filho⁹; Allan Polverini¹⁰; Herika Brito¹¹; ¹Barão de Mauá, Faculty of Medicine; ²Max Planck University Center, Indaiatuba, São Paulo, Brazil; ³Federal University of Rio de Janeiro, Rio de Janeiro, Brazil; ⁴Department of Neurosurgery, Lenox Hill Hospital/Northwell Health, New York, NY, USA; ⁵Faculty of Medical Sciences, University of Pernambuco, Pernambuco, Brazil; ⁶College of Medicine Multivix, Cachoeiro de Itapemirim - ES, Brazil; ⁷Faculty of Medical Sciences, Metropolitan University of Barranquilla , Barranquilla, Colombia; ⁸Faculty of Medicine, FMABC University Center, São Paulo, Brazil; ⁹Federal University of Fortaleza, Ceara, Brazil; ¹⁰Neurosurgical Oncology division, Department of Neurosurgery, Barretos Cancer Hospital, Barretos, São Paulo; ¹¹Department of Neurosurgery, Mayo Clinic Hospital, Arizona, United States

 

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(V081) DIRECT ELECTROMYOGRAPHIC MONITORING OF THE LATERAL RECTUS MUSCLE DURING FRONTOTEMPORAL-ORBITOZYGOMATIC APPROACH FOR RESECTION OF A SUPERIOR ORBITAL FISSURE SCHWANNOMA
Rithvik Ramesh, BA¹; Maximiliano Nuñez, MD²; Wesley Shoap, MD³; Ezequiel Goldschmidt, MD, PhD¹; ¹University of California, San Francisco; ²Stanford University; ³Louisiana State University

(V082) RESECTION OF JUGULAR FORAMEN SCHWANNOMA THROUGH EXTREME MEDIAL APPROACH
Ivo Petoe; Hussam Abou-Al-Shaar; Carl H Snyderman; Paul A Gardner; University of Pittsburgh Medical Center

(V083) ONE-PIECE ORBITOZYGOMATIC CRANIOTOMY FOR GIANT TRIGEMINAL SCHWANNOMA OF INFRATEMPORAL AND MIDDLE FOSSA
Muhammad Waqas, MD; Hussain Shallwani, MD; Jaims Lim, MD; Hanna N Algattas, MD; University at Buffalo Jacobs School of Medicine

(V084) RETROSIGMOID APPROACH FOR RESECTION OF A LEFT PONTINE CAVERNOMA VIA PARATRIGEMINAL SAFE ENTRY ZONE
Ehsan Dowlati; Justin Turpin, MD; Amir R Dehdashti, MD; North Shore University Hospital

(V085) MICROSURGICAL RESECTION OF TRIGEMINAL SCHWANNOMA VIA TRANSORBITAL APPROACH
Mustafa Motiwala¹; Parvesh Konda²; Jahangir Sajjad²; Muhammad W Baqai²; Rebecca Ford²; Cristina Cernei²; Kumar Abhinav²; ¹University of Tennessee Health Science Center; ²Southmead Hospital

(V086) A CASE OF HEARING LOSS AND TRIGEMINAL NEURALGIA SECONDARY TO TANDEM COCHLEAR NERVE SCHWANNOMA AND NEUROVASCULAR CONFLICT OF THE LEFT TRIGEMINAL NERVE
Ellina Hattar, MD¹; Gregory P Lekovic, MD, PhD²; William H Slattery, MD³; ¹Thomas Jefferson University Hospital; ²University of California, Los Angeles; ³PIH Health House Clinic

(V087) EXTRADURAL MIDDLE FOSSA APPROACH TO GSPN SCHWANNOMA
Kuntal Das; Vipin Sahu; Ravishankar M; Kamlesh Bhaisora; Arun Srivastava; Awadhesh Jaiswal; SGPGIMS, Lucknow, India

(V088) PRINCIPLES OF SUBPERINEURIAL DISSECTION TECHNIQUE: A POTENTIAL BALANCE BETWEEN CRANIAL NERVE PRESERVATION AND EXTENT OF RESECTION IN KOOS GRADE IV VESTIBULAR SCHWANNOMAS
Mehdi Khaleghi; Lucas Carlstrom; Robert Macielak; Oliver Adunka; Daniel M Prevedello; Ohio State University, Wexner Medical Center

 

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(S228) OUTCOMES OF SKULL BASE CHONDROSARCOMA SURGERY: A RETROSPECTIVE ANALYSIS OF MULTICENTER REGISTRY
Ivo Petoe¹; Hanna Algattas¹; Franco Rubino²; Carl H Snyderman¹; Paul A Gardner¹; Eric Wang¹; Garret Choby¹; Vigo Vera³; Franco DeMonte²; Shaan Raza²; Juan Carlos Fernandez-Miranda³; Georgios A Zenonos¹; ¹University of Pittsburgh; ²MD Anderson Cancer Center; ³Stanford University

(S229) PARTIAL LABYRINTHECTOMY PETROUS APICECTOMY FOR LARGE PETROCLIVAL MENINGIOMAS: HEARING PRESERVATION RATE AND QUALITY OF LIFE OUTCOMES
David CH Tan, MBBS, FRACS¹; Jeremy Kam, MBBS, FRACS¹; Benjamin Brakel²; Serge Makarenko, MD, FRCSC¹; Brian Westerberg, MD, FRCSC, MHSc¹; Ryojo Akagami, MD, BSc, MHSc, FRCSC¹; ¹Vancouver General Hospital; ²University of British Columbia

(S230) PURELY ENDOSCOPIC SUBTEMPORAL KEYHOLE ANTERIOR TRANSPETROSAL APPROACH TO ACCESS THE PETROUS APEX REGION: SURGICAL TECHNIQUES AND EARLY RESULTS
Takeo Goto; Hiroki Morisako; Department of Neurosurgery, Osaka Metropolitan University

(S232) APPLIED MICROANATOMY OF THE PETROUS INTERNAL CAROTID ARTERY, GREATER SUPERFICIAL PETROSAL NERVE AND TENSOR TYMPANI MUSCLE TO IMPROVE SAFETY DURING MIDDLE FOSSA SURGERY—LABORATORY CADAVERIC INVESTIGATION
Ali Tayebi Meybodi, MD; Andrea L Castillo, MD; Michael T Lawton, Md; Mark C Preul, MD; Barrow Neurological Institute

(S233) MIMIMAL ANTERIOR AND POSTERIOR COMBINED PETROSAL APPROACH TO LARGE PETROCLIVAL MENINGIOMAS
Takeo Goto; Kenji Ohata; Department of Neurosurgery, Osaka Metropolitan University

(S234) QUANTITATIVE CADAVERIC COMPARISON OF EXPOSURE IN STANDARD RETROSIGMOID SUB-OCCIPITAL CRANIOTOMY (RSSO) APPROACH VERSUS EXTENDED RSSO APPROACH FOR ACCESS TO PETROCLIVAL REGION
Biren K Patel, MBBS, MS, MCh; Leonardo Tariciotti; Alejandra Rodas; Youssef Zohdy; J. Manuel Revuelta Barbero; Erion Jr De Andrade; Justin Maldonado; Samir Lohana; Rodrigo Uribe-Pacheco; Hanyao Sun; Roberto Soriano; Tomas Garzon-Muvdi; C.Arturo Solares; Gustavo Pradilla; Emory University

(S235) COMBINED ENDOSCOPIC ENDONASAL TRANSPTERYGOID SUPRA- AND INFRAPETROSAL APPROACH: TECHNICAL FEASIBILITY, ANATOMIC LIMITATIONS, AND SURGICAL IMPLICATIONS OF THE SUPRACONDYLAR GROOVE FOR SPHENOPETROCLIVAL CHONDROSARCOMAS
Mehdi Khaleghi, MD; Kyle C Wu; Matthieu D Weber; Kyle K VanKoevering; Ricardo Carrau; Daniel M Prevedello, MD; Ohio State University, Wexner Medical Center

(S236) EXPANDING THE LIMITS OF THE ENDOSCOPIC ENDONASAL APPROACH TO THE PETROUS APEX THROUGH THE ADDITION OF THE CONTRALATERAL TRANSMAXILLARY CORRIDOR AND STEPWISE MOBILIZATION OF THE PARACLIVAL INTERNAL CAROTID ARTERY
Liang Xia; Maria Karampouga; Jiabin Zhan; I-sorn Phoominaonin; Rakhmon Egamberdiev; Kyle Affolter; Carl H Snyderman; Eric W Wang; Garret W Choby; Georgios Zenonos; Paul A Gardner; Department of Neurological Surgery, University of Pittsburgh, School of Medicine, Pittsburgh, Pennsylvania, United States

 

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(S237) IMMUNOLOGIC HALLMARKS DISTINGUISH THE TRANSCRIPTOMES OF GRADE I AND GRADE II MENINGIOMAS
Joshua A Reynolds, MS¹; Isabella L Pecorari, BS¹; Abigail Funari, MD²; Kith Pradhan, PhD³; Amit Verma, MD⁴; Emad N Eskandar, MD¹; Vijay Agarwal, MD¹; ¹Department of Neurological Surgery, Montefiore Medical Center-Albert Einstein College of Medicine; ²Department of Neurosurgery, SUNY Upstate Medical University; ³Department of Epidemiology and Population Health, Albert Einstein College of Medicine; ⁴Department of Hematology-Oncology, Albert Einstein College of Medicine

(S238) PREDICTING PITUITARY ADENOMA CONSISTENCY USING RADIOMIC DATA MINING AND MACHINE LEARNING ON T2-WEIGHTED MRI: A MULTICENTER RETROSPECTIVE STUDY
Edoardo Agosti¹; Lorenzo Ugga²; Marcello Mangili¹; Renato Cuocolo²; Vittorio Rampinelli¹; Pierlorenzo Veiceschi³; Marina Cappelletti⁴; Pier Paolo Panciani¹; Luigi Maria Cavallo²; Davide Locatelli⁵; Alessandro Fiorindi¹; Marco Maria Fontanella¹; ¹University of Brescia; ²Federico II University; ³Ospedale Civico of Palermo; ⁴Ospedale Ca' Forcello of Treviso; ⁵Insubria University

(S239) EXPANDING THE INFERIOR ACCESS TO THE CRANIOVERTEBRAL JUNCTION THROUGH CONTRALATERAL NASOFRONTAL TREPHINATION AND POSTERIOR PALATECTOMY: A CADAVERIC COMPARATIVE STUDY WITH QUANTITATIVE ANALYSIS
Moataz D Abouammo, MD, MSc¹; Maithrea S Narayanan, MBBS, MMED²; Mohammad Bilal Alsavaf, MD¹; Mohammed Alwabili, MD³; Simona Serioli, MD⁴; Jimmy Qiu, MASc⁵; Guilherme Mansur, MD⁶; Chandrima Biswas, MD⁶; Jaskaran S Gosal, MCh⁷; Noha E Shalaby, MD, MSc⁸; Mohamed Ammo, PharmB⁹; Kyle K VanKoevering, MD¹; Kyle C Wu, MD⁶; Francesco Doglietto, MD, PhD¹⁰; Daniel M Prevedello, MD, MBA⁶; Ricardo L Carrau, MD, MBA¹; ¹Department of Otolaryngology-Head and Neck Surgery, The Ohio State University Wexner Medical Center, Columbus, Ohio, USA; ²Department of Otolaryngology and Head-Neck Surgery, Hospital Kuala Lumpur, Jalan Pahang 50586 Kuala Lumpur, Wilayah Persekutuan Kuala Lumpur, Malaysia; ³Department of Otorhinolaryngology-Head and Neck Surgery, Prince Sultan Military Medical City, Riyadh, Saudi Arabia; ⁴Division of Neurosurgery, Department of Medical and Surgical Specialties, Radiological Sciences, and Public Health, Spedali Civili of Brescia, University of Brescia, Brescia, Italy; ⁵TECHNA Institute, University Health Network, Toronto, Ontario, Canada; ⁶Department of Neurological Surgery, The Ohio State University Wexner Medical Center, Columbus, Ohio, USA; ⁷Department of Neurosurgery, All India Institute of Medical Sciences (AIIMS), Jodhpur, Rajasthan, India; ⁸Faculty of Medicine, Tanta University, Tanta, Egypt; ⁹The University of Western Ontario; ¹⁰Department of Neurosurgery, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, 00168 Rome, Italy

(S240) THE IMPACT OF MRI-DEFINED EXTENT OF RESECTION ACROSS MENINGIOMA DNA METHYLATION GROUPS: RE-EVALUATING SURGERY IN THE ERA OF MENINGIOMA MOLECULAR CLASSIFICATION
Ramin Morshed, MD¹; Minh P Nguyen¹; Abrar Choudhury¹; Stephen Magill, MD, PhD²; Nadeem Al-Adli¹; Alexander F Haddad¹; Kanish Mirchia¹; Calixto-Hope G Lucas³; Michael McDermott⁴; William Chen¹; David Raleigh¹; ¹UCSF; ²Northwestern University; ³Johns Hopkins University; ⁴Miami Neuroscience Institute

(S241) METABOLIC PROFILING OF MENINGIOMA REVEALS NOVEL SUBGROUP-SPECIFIC BIOLOGIC INSIGHTS AND OUTCOME DEPENDENCIES
Alexander Landry, MD; Justin Wang, MD, PhD; Jeff Liu, PhD; Vikas Patil; Wen-Jiang Zhang, PhD; Julio Sosa; Yosef Ellenbogen; Chloe Gui; Andrew Ajisebutu; Thomas Kislinger; Eric Chen; Farshad Nassiri; Gelareh Zadeh; University of Toronto

(S242) GENETIC ANALYSIS POINTS TO A DISTINCT TRANSCRIPTOMIC IDENTITY FOR GRADE II MENINGIOMAS
Joshua A Reynolds, MS¹; Isabella L Pecorari, BS¹; Abigail Funari, MD²; Kith Pradhan, PhD³; Amit Verma, MD⁴; Emad N Eskandar, MD¹; Vijay Agarwal, MD¹; ¹Department of Neurological Surgery, Montefiore Medical Center-Albert Einstein College of Medicine; ²Department of Neurosurgery, SUNY Upstate Medical University; ³Department of Epidemiology and Population Health, Albert Einstein College of Medicine; ⁴Department of Hematology-Oncology, Albert Einstein College of Medicine

(S243) DESIGN, FABRICATION AND TESTING OF A THIN-FILM SOFT ROBOT WITH MULTIPLE DEGREES OF FREEDOM TO EXPAND THE REACH OF OPEN AND ENDONASAL SKULL BASE APPROACHES
Yifan You, BS¹; Chen Dai, BS¹; Wesley Shoap, MD²; Daniel Quintana, BA³; Shunheng Xin, PhD¹; Ronald S Fearing, PhD¹; Ezequiel Goldschmidt, MD, PhD³; ¹Department of Electrical Engineering and Computer Science, University of California, Berkeley, Berkeley, CA, USA; ²Departments of Neurosurgery, Louisiana State University Health New Orleans, New Orleans, LA, USA; ³Department of Neurological Surgery, University of California, San Francisco, San Francisco, California, USA.

(S244) CAROTID PLEXUS SYMPATHETIC NERVES AS A LANDMARK FOR THE ABDUCENS NERVE WITHIN THE CAVERNOUS SINUS DURING ENDOSCOPIC ENDONASAL SURGERY: CADAVERIC ANATOMICAL STUDY AND SURGICAL CONSIDERATION
I-sorn Phoominaonin, MD¹; Andres Felipe Vargas Rosales, MD²; Garret W Choby³; Eric W Wang, MD³; Georgios A Zenonos, MD²; Carl H Snyderman, MD, MBA³; Paul A Gardner, MD²; ¹Department of Health Technology, Navamindradhiraj University, Bangkok, Thailand; ²Department of Neurological Surgery, University of Pittsburgh, Pittsburgh, Pennsylvania, USA; ³Department of Otolaryngology, University of Pittsburgh, Pittsburgh, Pennsylvania, USA

 

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(V096) EXTENDED ENDOSCOPIC TRANSPTERYGOID APPROACH FOR RESECTION OF A TRIGEMINAL SCHWANNOMA
Maryam N Shahin, MD; Ali I Rae, MD, MPH; Mathew N Geltzeiler, MD; Olabisi R Sanusi, MD; Oregon Health & Science University

(V090) THE TRANSPTERYGOID- TRANSMANDIBULAR STRUT- TRANSMEDIAL JUGULAR TUBERCLE INFERIOR TRANSPETROSAL ENDOSCOPIC ENDONASAL APPROACH AS A ROADMAP TO THE PARAPHARYNGEAL INTERNAL CAROTID ARTERY. CLINICAL CASE PRESENTATION AND OPERATIVE VIDEO.
Maria Karampouga, MD¹; Liang Xa, MD, PhD¹; Gregory J Varga, MS¹; Eric Wang, MD²; Carl H Snyderman, MD, MBA²; Paul A Gardner, MD¹; Garret W Choby, MD²; Georgios A Zenonos, MD¹; ¹Department of Neurological Surgery, Center for Cranial Base Surgery, University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania, USA; ²Department of Otolaryngology, University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania, USA

(V089) JUVENILE NASOPHARYNGEAL ANGIOFIBROMA: A HYBRID ENDOSCOPIC ENDONASAL AND TRANSMAXILLARY APPROACH
Bastien A Valencia-Sanchez, MD¹; Jeeho D Kim, MD²; Michael L Levy, MD, PhD³; Jeffrey S Pannell, MD⁴; Javan Nation, MD⁵; Sean P Polster⁶; Vijay A Patel³; ¹Tecnologico de Monterrey; ²Naval Medical Center San Diego; ³University of California San Diego, Rady Children's Hospital - San Diego; ⁴University of California San Diego; ⁵Rady Children's Hospital - San Diego; ⁶University of Chicago

(V091) TRANSPTERYGOID RESECTION OF A TRIGEMINAL SCHWANNOMA VIA DENKER'S MAXILLECTOMY
C K Koenigsberg; A Shah; S Huang; A Sajjadi; K Rubel; A Venteicher; N Godse; University of Minnesota

(V092) MEDIAL TRANSSPHENOIDAL ENDOSCOPIC ENDONASAL APPROACH TO PETROUS APEX CHOLESTEROL GRANULOMA
Catherine P Policina, MD; Zoukaa B Sargi, MD, MPH; Carolina Benjamin, MD, FAANS; Turki Elarjani, MD; University of Miami

(V093) INDOCYANINE GREEN ANGIOGRAPHY ASSISTED ENDONASAL MARSUPIALIZATION OF A PETROUS APEX CHOLESTEROL GRANULOMA
Wesley Shoap, MD¹; Maximiliano Nunez, MD²; Ivan El-Sayed, MD³; Ezequiel Goldschmidt, MD, PhD⁴; ¹LSU New Orleans Department of Neurosurgery; ²Stanford University School of Medicine Department of Neurosurgery; ³University of California San Francisco School of Medicine Department of Otorhinolaryngology; ⁴University of California San Francisco School of Medicine Department of Neurosurgery

(V094) ENDOSCOPIC DECOMPRESSION OF A LARGE LEFT PETROUS APEX CHOLESTEROL GRANULOMA VIA A TRANSNASAL TRANSSPHENOIDAL APPROACH
Felix E Fernández-Penny, BS; Hector Perez, MD; Samuel Emerson, MD, PhD; Aria Jafari, MD; University of Washington

(V095) ENDOSCOPIC ENDONASAL MANAGEMENT OF A PETROCLIVAL CHOLESTEROL GRANULOMA
Ashleigh A Halderman, MD¹; Samuel L Barnett, MD²; Walter Kutz, MD²; ¹Westchester Medical Center; ²University of Texas Southwestern Medical Center

 

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(S246) FUNCTIONAL AND COSMETIC RESULTS IN PATIENTS WITH HYPEROSTOTIC SPHENOORBITAL MENINGIOMAS ACCORDING TO THE TECHNIQUE OF SURGICAL DEFECT RECONSTRUCTION.
Nikolay Lasunin; Abdulla Abdullaev; Anna Kadasheva; Kirill Efremov; Burdenko Neurosurgical Center

(S247) EVALUATING THE ZERO-SHOT SEGMENTATION PERFORMANCE OF META'S "SEGMENT ANYTHING MODEL" ON MENINGIOMA MRI IMAGING
Rushmin Khazanchi; Sachin Govind; Harrshavasan Congivaram; Nishanth Sadagopan; Stephen T Magill; Northwestern University

(S248) LONG-TERM CRANIAL NERVE OUTCOMES FOLLOWING CEREBELLOPONTINE ANGLE MENINGIOMA RESECTION: A TWO-YEAR RETROSPECTIVE ANALYSIS
Ishav Shukla, BS; Nicholas Bever, BS; Ali Ebada, BS; Jeffrey Traylor, MD; Samuel Barnett, MD; Matthew Sun, MD; University of Texas Southwestern Medical Center

(S249) MODELLING OF GROWTH PATTERNS OF POSTOPERATIVE MENINGIOMA REMNANTS
Marc-Olivier Comeau; François Gascon; Xavier Roberge, MD; Martin Côté, MD; Guilherme Gago, Dr; Pierre-Olivier Champagne, MD, PHD; Université Laval

(S250) DISCREPANCIES IN THE NATURAL HISTORY OF INTRACRANIAL MENINGIOMA BETWEEN MEN AND WOMEN
Juliette Fournier-Loiselle; Arianne Boudreault; Xavier Roberge; Nicholas Morin; Sophie Sabourin; Marc-Olivier Comeau; Laurie Santerre; Martin Côté; Pierre-Olivier Champagne; Neurosurgery Department, CHU de Québec - Université Laval, Québec, Québec, Canada

(S251) EVALUATING ADJUVANT RADIATION THERAPY FOR GRADE 2 MENINGIOMA: A MULTI-INSTITUTIONAL ANALYSIS
Saksham Gupta; Harshit Arora; Velina Chavarro; Noah Nawabi; Rahya Karanth; Samantha Sadler; Lila Medeiros; Neel Mehta; Rohan Jha; Marcelle Altshuler; Joshua Bernstock; Timothy Smith; Timothy Smith; Omar Arnaout; Brigham and Women's Hospital

(S252) TERTP MUTANT MENINGIOMAS IN THE ABSENCE OF CONCURRENT AGGRESSIVE FEATURES EXHIBIT BETTER OUTCOMES THAN TERTP WILDTYPE WHO GRADE 3 MENINGIOMAS
Karenna J Groff¹; Ruchit V Patel²; William C Chen³; Mark W Youngblood⁴; Hia S Ghosh²; Catena Kresbach⁵; Christopher Mount⁶; Vijay Nitturi⁷; Marc Rosenblum⁸; Akshay Save¹; Abigail K Suwala⁹; Tejus A Bale⁸; Chunyu Cai¹⁰; Akash J Patel⁷; Timothy E Richardson¹¹; Sandro Santagata²; Felix Sahm⁹; Ulrich Schüller⁵; Chandra Sen¹; Stephen T Magill⁴; David R Raleigh³; Donato R Pacione¹; Matija Snuderl¹; Wenya Linda Bi²; ¹NYU Langone Health; ²Brigham and Women's Hospital; ³UCSF; ⁴Northwestern University; ⁵University Medical Center Hamburg; ⁶Massachusetts General Hospital; ⁷Baylor College of Medicine; ⁸Memorial Sloan Kettering Cancer Center; ⁹University Hospital Heidelberg; ¹⁰UT Southwestern Medical Center; ¹¹Mount Sinai Hospital

(S254) APPLICATION OF A NEW PROTOCOL FOR EXTENT OF RESECTION OF MENINGIOMAS
Tiit Mathiesen; University Hospital of Copenhagen

 

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(S255) FACIAL NEUROMAS, AN UNDERDIAGNOSED PATHOLOGY IN FACIAL PALSY: A SYSTEMATIC REVIEW
Kaitlynne Y Pak, MD¹; Alberto Nunez¹; Andre Boyke, MD²; Mia Miller, MD¹; ¹Cedars Sinai Medical Center, Division of Otolaryngology, Head and Neck Surgery; ²Department of Neurosurgery, Cedars-Sinai Medical Center

(S256) INITIAL EXPERIENCE WITH MODIFICATION OF PLONTKE TECHNIQUE IN COCHLEAR SCHWANNOMA RESECTION AND SIMULTANEOUS PLACEMENT OF COCHLEAR IMPLANT: USE OF A NOVEL MICRO-ENDOSCOPE AND DEPTH GAUGE STYLET TECHNIQUE.
Amed Natour, MD¹; Adam Vesole²; Ravi N Samy¹; ¹Lehigh Valley Health Network; ²University Of Cincinnati Medical Center

(S257) A COMBINED INTRA-EXTRADURAL APPROACH TO THE JUGULAR FORAMEN FOR COMPLEX LESIONS WITH TRANSFORAMINAL EXTRACRANIAL EXTENSION: A TECHNICAL CLINICAL SERIES
Travis Atchley¹; Marinelle Castro²; Carlos Nicolas-Cruz³; Michel Mondragon-Soto³; Philip Stieg⁴; Alexander Evins⁴; Antonio Bernardo⁴; ¹University of Alabama at Birmingham Health System; ²Dept. of Neurosurgery in The Medical City, Philippines; ³Instituto Nacional de Neurología y Neurocirugía, Mexico City; ⁴Weill Cornell Medicine

(S258) VESTIBULAR SCHWANNOMA MANAGEMENT PARADIGM SHIFT: HAS LESS THAN TOTAL RESECTION HAD AN IMPACT ON THE NEED FOR FURTHER TREATMENT AND FACIAL NERVE OUTCOMES?
Hala Kanona, Dr^1,2; Jigi Moudgil-Joshi, Dr²; Ankit Patel, Dr¹; Simon Williams, MBChB MRCS³; Mariella Fortune-Ely, Dr¹; James Arwyn-Jones, Dr^6,7; Nish Mehta, Dr^1,8; S Jawad, Dr¹; Patrick Grover, Dr^3,4; Robert Bradford, Dr³; Sherif Khalil, Dr^1,2; Shakeel R. Saeed, Professor^1,2; ¹The Royal National ENT Hospital, University College London Hospitals, London, United Kingdom; ²The Royal National ENT Hospital and National Hospital for Neurology and Neurosurgery, University College London Hospitals, London, United Kingdom; ³Victor Horsley Department of Neurosurgery, National Hospital for Neurology and Neurosurgery, London, UK; ⁴Wellcome/EPSRC Centre for Interventional and Surgical Sciences, University College London, London, UK; ⁵The Francis Crick Institute, London, UK; ⁶University College London Great Ormond Street Institute of Child Health, London, United Kingdom; ⁷Great Ormond Street Hospital, London, United Kingdom; ⁸UK NIHR UCLH BRC Deafness and Hearing Problems Theme, Ear Institute, University College London, London, UK

(S259) ANALYSIS OF ENDOSCOPE-ASSISTED RETROSIGMOID APPROACH VERSUS MODIFIED TRANSJUGULAR APPROACH FOR MICROVASCULAR DECOMPRESSION OF THE FACIAL NERVE, A COMPARATIVE CADAVERIC STUDY
Felipe Sfeir, MD¹; Mehrdad Pahlevani, MD¹; Fan Zhao, MD¹; Kayla Lanker¹; Alex Corlin, BA¹; Regin Jay Mallari, BS¹; Gregory Lekovic, MD²; Garni Bakhoudarian, MD¹; ¹Pacific Neuroscience Institute; ²UCLA

(S260) DIFFUSION 7T- MRI OF THE FACIAL-VESTIBULOCOCHLEAR NERVE COMPLEX FOR LATERAL SKULL BASE SURGERY
Jigi Moudgil-Joshi, Dr, MBChB^1,2,3; Musa China, Dr^1,2,3; Ozlem Ipek, Dr, PhD⁴; Anand Pandit, Dr, PhD^1,5; Jonathan Shapey, Dr, PhD, FRCS^4,6; Patrick Grover, Dr, FRCS^1,2; Hani J Marcus, Dr, PhD, FRCS^1,2; William Muirhead, Dr, MD, FRCS^1,2,3; David L Thomas, Dr, PhD⁷; ¹Victor Horsley Department of Neurosurgery, National Hospital for Neurology and Neurosurgery, London, UK; ²Wellcome/EPSRC Centre for Interventional and Surgical Sciences, University College London, London, UK; ³The Francis Crick Institute, London, UK; ⁴School of Biomedical Engineering and Imaging Sciences, Kings College London, London, UK; ⁵High-Dimensional Neurology, UCL Queen Square Institute of Neurology, UK; ⁶Department of Neurosurgery, Kings College London Hospital, London, United Kingdom; ⁷Department of Brain Repair and Rehabilitation, UCL Queen Square Institute of Neurology, University College London (UCL), London, UK

(S261) LIMITS OF ENDOSCOPIC CONTRALATERAL TRANSMAXILLARY APPROACH TO JUGULAR FORAMEN: AN ANATOMICAL STUDY
Ivo Petoe; Hussam Abou-Al-Shaar; Ling Xia; Garret Choby; Georgios A Zenonos; Carl H Snyderman; Eric Wang; Paul A Gardner; University of Pittsburgh Medical Center

(S262) SURGICAL MANAGEMENT OF 65 FACIAL NERVE SCHWANNOMAS AIMING FOR IMPROVEMENT OF FACIAL FUNCTION
Ken Matsushima, MD, PhD; Michihiro Kohno, MD, PhD; Nobuyuki Nakajima, MD, PhD; Norio Ichimasu, MD, PhD; Kiyoaki Tsukahara, MD, PhD; Taro Inagaki, MD, PhD; Tokyo Medical University

(S263) GAMMA KNIFE SURGERY FOR PATIENTS WITH JUGULAR FORAMEN SCHWANNOMAS: SYSTEMATIC REVIEW AND META-ANALYSIS
Filipe Ribeiro¹; Lucca Palavani²; Marcelo Porto Sousa³; José Victor Santos⁴; Christian Fukunaga⁵; Helvécio Filho⁶; Davi Coelho⁷; Yasmin Silva⁸; Márcio Ferreira⁹; Filipi F Andreão³; Mariana Dagios¹; Herika Negri¹⁰; ¹Barão de Mauá, Faculty of Medicine; ²Max Planck University Center, Indaiatuba, São Paulo, Brazil; ³Federal University of Rio de Janeiro, Rio de Janeiro, Brazil; ⁴University Center Estácio of Ceará, Faculty of Medicine, Iguatu, CE, Brazil; ⁵Faculty of Medicine, FMABC University Center, São Paulo, Brazil; ⁶Faculty of Medicine, University of Fortaleza, Fortaleza, Brazil; ⁷CEUMA University, Imperatriz, Brazil; ⁸University of Debrecen, Debrecen, Hungary; ⁹Department of Neurosurgery, Lenox Hill Hospital/Northwell Health, New York, NY, USA; ¹⁰Department of Neurosurgery, Mayo Clinic Hospital, Arizona, United States

(S264) THE PERSISTENT JUGULAR ARTERY. A PRIMITIVE CAROTID-BASILAR ANASTOMOSIS TRAVERSING THE JUGULAR FORAMEN.
Silvia M Vergara, MD¹; Jorge Cespedes, MD²; Fernando Ahumada, MD³; Jorge E Alvernia, MD⁴; R S Tubbs, PhD, MS, PAC¹; Orlando Diaz, MD⁵; ¹Tulane University; ²Universidad Autonoma de Centro America; ³Universidad del Norte; ⁴Brain and Spine Associates; ⁵Houston Methodist

 

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(V097) TREATMENT OF A GIANT FUSIFORM VERTEBROBASILAR ANEURYSM IN A HYBRID OR: M2-RAG-P2 BYPASS AND ENDOVASCULAR COILING
Sonia Ajmera, MD; Rachel Blue, MD; Rashad Jabarkheel, MD; Visish Srinivasan, MD; Jan-Karl Burkhardt, MD; University of Pennsylvania Health System, Department of Neurosurgery

(V098) TAKEDOWN OF FRONTAL SINUS CRANIALIZATION DURING ENDOSCOPIC REVISION RESECTION OF FRONTOETHMOIDAL OSTEOMA
Alexander J Straughan, MD¹; Aanish Puri, BA¹; Ebone Bady, MD²; Kolin Rubel, MD²; Ramchandra Tummala, MD³; Neal Godse, MD¹; ¹University of Minnesota Department of Otolaryngology; ²University of Arkansas Department of Otolaryngology; ³University of Minnesota Department of Neurosurgery

(V099) EC-IC/IC-IC BYPASS WITH RADIAL & DESCENDING LATERAL CIRCUMFLEX FEMORAL ARTERY INTERPOSITION GRAFTS FOR GIANT MCA ANEURYSM
Vincent N Nguyen, MD; Nadia Atai; Lacin Koro, MD; Joseph N Carey, MD; Jonathan J Russin, MD; University of Southern California

(V100) A LARGE VENTRAL CERVICO-MEDULLARY MENINGIOMA RESECTION: JUXTACONDYLAR FAR LATERAL APPROACH WITH TECHNICAL NUANCES ON DISSECTION AND SPINAL CORD ROTATION
Adnan H Shahid, MBBS, MS, MCh; Danner Butler, BS; Sudhir Suggala, MBBS, MS, MCh; Ursula Hummel, MHS, PAC; Danielle Chason, MSNBCAGACNP, RNFA; Jai D Thakur, MD, FAANS; University of South Alabama

(V101) EXTENDED FAR LATERAL CRANIOTOMY FOR OCCIPITAL ARTERY-POSTERIOR INFERIOR CEREBELLAR ARTERY BYPASS AND CLIPPING OF RUPTURED DISSECTING PICA ANEURYSM
Ehsan Dowlati; Justin Turpin, MD; Danielle Golub, MD; Amir R Dehdashti, MD; North Shore University Hospital

(V102) RETROSIGMOID TRANSTENTORIAL APPROACH WITH SUPRAMEATAL DRILLING (KAWASE FROM BELOW) FOR GROSS TOTAL RESECTION OF A LARGE PETROCLIVAL MENINGIOMA
Spyridon Karadimas¹; Ankush Chandra²; Jacques J Morcos²; ¹Thomas Jefferson University; ²UTHealth Houston

(V103) MINI-COMBINED TRANSPETROSAL APPROACH FOR A PETROCLIVAL MENINGIOMA
Arianna Fava, MD; Jonathan Chaney, MD; Jerold Justo, MD; Thibault Passeri, MD; Sébastien Froelich, MD, PhD; Hôpital Lariboisière, Paris

(V104) ENDOSCOPIC TRANSORBITAL AMYGDALO-HIPPOCAMPECTOMY FOR A LOW-GRADE GLIOMA
Tristan Martin, MSc¹; Benjamin S Kahozi, MD¹; Sami Obaïd, MD, PhD, FRCSC¹; Béatrice Voizard, MD, MSc, FRCSC²; Pascal Lavergne, MD, FRCSC³; ¹Division of Neurosurgery, University of Montreal Hospital Center; ²Division of Oto-Rhino-Laryngology and Cervico-Facial Surgery, Sacred-Heart Hospital, University of Montreal; ³Division of Neurosurgery, Sacred-Heart Hospital, University of Montreal

 

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(S265) ASSESSMENT OF THE SUBARCUATE CANALICULUS AS A LANDMARK IN MIDDLE FOSSA SURGERY
Ali Tayebi Meybodi, MD; Andrea L Castillo, MD; Michael T Lawton, MD; Mark C Preul, MD; Barrow Neurological Institute

(S266) VESTIBULAR SCHWANNOMA KOOS GRADE I INTERNATIONAL STUDY OF ACTIVE SURVEILLANCE VERSUS STEREOTACTIC RADIOSURGERY: THE VISAS-K1 STUDY
Hussam Abou-Al-Shaar, MD¹; Othman Bin-Alamer, MBBS¹; Selcuk Peker, MD²; Yavuz Samanci, MD²; Isabelle Pelcher, BA³; Sabrina Begley, BA³; Anuj Goenka, MD³; Michael Schulder, MD³; Jean-Nicolas Tourigny, MD, MS⁴; David Mathieu, MD⁴; Andréanne Hamel, BSc⁴; Robert G Briggs, MD⁵; Cheng Yu, PhD⁵; Gabriel Zada, MD⁵; Steven L Giannotta, MD⁵; Herwin Speckter, MD, MSc⁶; Sarai Palque, MD⁶; Manjul Tripathi, MCh⁷; Saurabh Kumar, MS⁷; Rupinder Kaur, BSc⁷; Narendra Kumar, MD⁷; Brandon Rogowski, MD⁸; Matthew J Shepard, MD⁹; Bryan A Johnson, MD, MBA¹⁰; Daniel M Trifiletti, MD¹⁰; Ronald E Warnick, MD¹¹; Samantha Dayawansa, MD, PhD¹²; Elad Mashiach, MS¹³; Fernando De Nigris Vasconcellos, MD¹³; Kenneth Bernstein, MD¹³; Zane Schnurman, MD¹³; Juan Alzate, MD¹³; Douglas Kondziolka, MD, MSc¹³; Jason P Sheehan, MD, PhD¹²; ¹University of Pittsburgh Medical Center; ²Koc University School of Medicine; ³Donald & Barbara Zucker School of Medicine at Hofstra/Northwell; ⁴Université de Sherbrooke; ⁵University of Southern California; ⁶Dominican Gamma Knife Center; ⁷Post Graduate Institute of Medical Education and Research; ⁸Drexel University School of Medicine; ⁹Allegheny Health Network; ¹⁰Mayo Clinic; ¹¹Mayfield Clinic; ¹²University of Virginia; ¹³NYU Langone

(S267) BLINK REFLEX NEUROMONITORING TO PREDICT A CHANGE IN HOUSE BRACKMANN SCORE: AN INITIAL MACHINE LEARNING APPROACH
Jihad Abdelgadir, MD; Tanner J Zachem, BSE; Syed M Adil, MD; Jordan K Hatfield, MD; Holly Johnson, MS; Ralph A Hachem, MD; Patrick J Codd, MD; Ali Zomorodi, MD; Rory Goodwin, MD, PhD; Duke University

(S268) ASSESSING DISPARITIES IN SURGICAL RECOMMENDATIONS FOR VESTIBULAR SCHWANNOMA PATIENTS: A STUDY USING THE SURVEILLANCE, EPIDEMIOLOGY, AND END RESULTS DATABASE FROM 2000-2019
Adrian Li; Melanie Horowitz; Saket Myneni; Julian Gendreau; Debraj Mukherjee; Department of Neurosurgery, Johns Hopkins School of Medicine

(S269) FACIAL NERVE OUTCOMES FOLLOWING SUBTOTAL, NEAR-TOTAL AND TOTAL VESTIBULAR SCHWANNOMA RESECTION. A RETROSPECTIVE ANALYSIS OF THE BRITISH SKULL BASE SOCIETY NATIONAL VESTIBULAR SCHWANNOMA DATABASE.
Nathan Creber, FRACS, PhD¹; Samuel Mackeith, FRCS²; Rajeev Mathew, FRCS, PhD²; Charlotte Hammerbeck-Ward, FRCS, PhD³; Simon Lloyd, FRCS⁴; James Tysome, FRCS, PhD⁵; ¹Royal Prince Alfred Hospital Sydney, Australia; ²Oxford University Hospitals NHS Foundation Trust, UK.; ³University Hospitals Sussex NHS Foundation Trust, UK.; ⁴Manchester University Hospital NHS foundation Trust, UK.; ⁵Cambridge University Hospitals NHS Foundation Trust, UK.

(S270) BRITISH SKULL BASE SOCIETY EVIDENCE-BASED CONSENSUS ON VESTIBULAR SCHWANNOMA SURVEILLANCE BASED ON CONDITIONAL PROBABILITY OF TUMOUR GROWTH
James Tysome; Cambridge University Hospitals

(S272) PSYCHOSOCIAL OUTCOMES IN PATIENTS WITH NEUROFIBROMATOSIS TYPE 2: A RETROSPECTIVE DATABASE ANALYSIS
Samira Takkoush, MD¹; Heather J Smith, BM¹; Jason L Steele, BS²; Mana Espahbodi, MD¹; Neil S Patel, MD¹; Richard K Gurgel, MD, MSCI¹; ¹University of Utah; ²Rocky Vista University

 

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(S274) ENDOSCOPIC ENDONASAL APPROACH FOR SKULL BASE LESIONS IN THE PEDIATRIC POPULATION
Casey A Jarvis, MD; Carolina Lopes, BS; Marcella Ruppert-Gomez, BS; Kelsey Largen, BS; Jessica Bryk, NP; Edward R Smith, MD; Katie P Fehnel, MD; Eelam Adil, MD; Lissa C Baird, MD; Boston Children's Hospital

(S275) AGE-RELATED VARIATION IN ACCESS TO THE POROUS ACOUSTICUS IN PEDIATRIC PATIENTS
Sam Tenhoeve, BS¹; Michael T Bounajem, MD¹; Diwas Gautam, BS¹; Allison Liang, MD¹; Michael Levy, MD²; Douglas Brockmeyer, MD¹; William T Couldwell, MD, PhD¹; Robert C Rennert, MD¹; ¹University of Utah; ²University of California San Diego

(S276) JUVENILE NASOPHARYNGEAL ANGIOFIBROMA: A CASE SERIES ANALYSIS
Nina M Westcott, BS; Logan J Nall; Michael A Ly, BA; Taylor Stack, MD; Ezer H Benaim, MD; Tom Raz Yarkoni, MD; Adam J Kimple, MD, PhD; Brent Senior, MD; Charles Ebert Jr., MD, MPH; Jackson R Vuncannon, MD; Brian D Thorp, MD; Cristine N Klatt-Cromwell, MD; Department of Otolaryngology- Head and Neck Surgery, University of North Carolina

(S277) AGE-RELATED VARIATION IN ANTERIOR SKULL BASE PARAMETERS INFLUENCING ACCESS TO THE HYPOTHALAMIC AND THIRD VENTRICULAR REGION IN PEDIATRIC PATIENTS
Michael T Bounajem, MD¹; Diwas Gautam, BS¹; Sam Tenhoeve, BS¹; Allison Liang, MD¹; Michael Levy, MD²; Douglas Brockmeyer, MD¹; William T Couldwell, MD, PhD¹; Robert C Rennert, MD¹; ¹University of Utah; ²University of California San Diego

(S278) DUPLICATION OF THE PITUITARY GLAND WITH A PERSISTENT CRANIOPHARYNGEAL CANAL
Kevin Fujita-Howie, MD; David Gudis, MD; Neil Feldstein; Columbia University Medical Center

(S279) EXPERIENCE IN ENDOSCOPIC SKULL BASE SURGERY OF PEDIATRIC PATIENTS TREATED IN A TERTIARY CARE NEUROSURGICAL CENTER
Mariela Villalobos, MD; Francisco Ringler, MD; Homero Sariego, MD; Katherine Walker, MD; Matias Gomez; Dr. Asenjo Institute of Neurosurgery

(S280) INTERDISCIPLINARY MANAGEMENT OF A TRANSETHMOIDAL MENINGOCELE IN A NEWBORN
Rose Fluss, MD; Anne R Lally, BA; Jinu Kim, MD; Andrew J Kobets, MD; Albert Einstein College of Medicine

(S281) ENDOSCOPIC ENDONASAL SURGERY FOR PEDIATRIC MENINGOENCEPHALOCELE: A CASE SERIES FROM A SINGLE CENTER
Ali A Alattar, MD, MAS; Madison Remick, MD; Joseph Garcia, MD; Anna Slingerland, BS; David Fernandes-Cabral, MD; Georgios Zenonos, MD; Garret Choby, MD; Amanda Stapleton, MD; Eric W Wang, MD; Carl Snyderman, MD, MBA; Paul Gardner, MD; Michael M McDowell, MD; University of Pittsburgh Medical Center

 

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(V105) EXTREME LATERAL SUPRACEREBELLAR INFRATENTORIAL APPROACH FOR RESECTION OF A MIDBRAIN CAVERNOMA
Ehsan Dowlati, MD; Justin Turpin, MD; Danielle Golub, MD; Amir R Dehdashti, MD; North Shore University Hospital

(V106) EN-BLOC RESECTION OF A LARGE SOLID HEMANGIOBLASTOMA IN THE RIGHT CEREBELLOPONTINE ANGLE
Ana Sofia Alvarez, MD¹; Vera Vigo, MD, PhD¹; Enrico Gambatesa, MD¹; Christine K Lee, MD, PhD²; Yuanzhi Xu, MD¹; Michael Lim, MD¹; Konstantina M Stankovic, MD¹; Juan Carlos Fernandez-Miranda, MD¹; ¹Stanford University; ²Brown University

(V107) EMERGENCY EXPANDED RETROSIGMOID APPROACH FOR RESECTION OF MULTIPLY AND ACUTELY REBLEEDING PONTINE CAVERNOMA WITH A LARGE DVA
Spyridon Karadimas¹; Ankush Chandra²; Jacques J Morcos²; ¹Thomas Jefferson University; ²UTHealth Houston

(V108) MINIPRETEMPORAL APPROACH FOR CAVERNOUS SINUS HEMANGIOMA
Rafael Martinez-Perez; Geisinger Medical Center

(V110) LATERAL SUPRAORBITAL TRANSLAMINA TERMINALIS APPROACH FOR RESECTION OF A CHIASMATIC CAVERNOMA
Spyridon Karadimas¹; Ivan Radovanovic²; ¹Thomas Jefferson University; ²University of Toronto

(V111) VENTRAL C1-C2 KISSING NEUROFIBROMA: TECHNICAL NUANCES ON SKULL BASE APPROACH AND BILATERAL CORD ROTATION WITH MAXIMIZING SAFE RESECTION CORRIDORS
Adnan H Shahid, MBBS, MS, MCh; Mehdi Khaleghi, MD; Sudhir Suggala, MBBS, MS, MCh; Danner Butler; Garrett Dyess; Ursula Hummel; Danielle Chason; Jai D Thakur, MD; University of South Alabama Mobile

(V112) CEREBELLAR HEMANGIOBLASTOMA
Ari D Kappel, MD; Omar Arnaout, MD; Brigham and Women's Hospital

 

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(S283) AGE-BASED VARIATION IN TREATMENT MODALITY AND TRENDS FROM 2004-2021 FOR VESTIBULAR SCHWANNOMA
Victoria Dreyer, BS; Peter Harris, MD; Lekhaj Daggubati, MD; The George Washington University School of Medicine

(S284) RETROSIGMOID VERSUS TRANSLABYRINTHINE APPROACH FOR VESTIBULAR SCHWANNOMA RESECTION: A RETROSPECTIVE REVIEW OF 270 CASES
Quang Nguyen, MD¹; Varun Shah, MD¹; Joseph Swetz²; Evangeline Bambakidis¹; Marte Van Keulen¹; Dana Defta, MD¹; Nicholas Bambakidis, MD¹; ¹University Hospitals Cleveland Medical Center; ²Case Western Reserve University School of Medicine

(S285) TRANSLABYRINTHINE VS. RETROSIGMOID APPROACH FOR VESTIBULAR SCHWANNOMA: A COMPARATIVE OUTCOMES STUDY WITH THE REAL-WORLD POPULATION-BASED DATA
Jinpyo Hong, BS¹; David Hallan, MD²; Elias Rizk, MD, PhD²; ¹Penn State College of Medicine, Penn State Health Milton S. Hershey Medical Center; ²Department of Neurosurgery, Penn State Health Milton S. Hershey Medical Center

(S287) DIFFERENCES IN DISEASE PRESENTATION AND RATES OF POSITIVE GENETIC TESTING BETWEEN PATIENTS DIAGNOSED WITH NF2-RELATED SCHWANNOMATOSIS BEFORE AND AFTER 30 YEARS OF AGE
Brennan Olson, MD, PhD; Matthew Carlson, MD; Brian Neff, MD; Colin Driscoll, MD; Dusica Babovic-Vuksanovic, MD; Lisa A Schimmenti, MD; James Dornhoffer, MD; Mayo Clinic

(S288) HIGHER RISK OF FACIAL NERVE FUNCTION DECREMENT AFTER RADIOSURGERY IN VESTIBULAR SCHWANNOMAS WITH PRIOR SURGICAL RESECTION
Jun Ma; Pranav Kumar; Alan Gordillo; Anish Kosanam; Juan D Alzate; Pranay Soni; Pablo F Recinos; Varun R Kshettry; Cleveland Clinic Foundation

(S289) THE COCHLEAR DIMPLE: A NOVEL LANDMARK FOR COCHLEAR PROTECTION DURING MIDDLE FOSSA SURGERY—A CADAVERIC LABORATORY INVESTIGATION
Ali Tayebi Meybodi, MD; Andrea L Castillo, MD; Ahmet Ozak, MD; Michael T Lawton, MD; Mark C Preul, MD; Barrow Neurological Institute

(S290) ONCO-FUNCTIONAL BALANCE IN LARGE VESTIBULAR SCHWANNOMAS SURGERY: IS THERE A SWEET SPOT BETWEEN EXTENT OF RESECTION AND QUALITY OF LIFE?
Marco Schiariti, MD, Neurosurgeon¹; Jacopo Falco, MD, Neurosurgeon¹; Luca Mattioli, MD²; Leonardo Maresca, MD²; Edoardo Barbieri, MD²; Riccardo Ciocca, MD²; Emanuele La Corte, MD, PhD, Neurosurgeon³; Francesco Restelli, MD, Neurosurgeon¹; Morgan Broggi, MD, Neurosurgeon¹; Michela Moretti, Psychologist¹; Paolo Ferroli, MD, Neurosurgeon¹; ¹Fondazione IRCCS Istituto Neurologico Carlo Besta; ²Università Statale of Milan; ³Ospedale Policlinico San Martino

(S291) DEEP LEARNING CONSENSUS-BASED FRAMEWORK FOR THE ANNOTATION OF A ROUTINE CLINICAL VESTIBULAR SCHWANNOMA MRI DATASET
Navodini Wijethilake¹; Marina Ivory¹; Oscar MacCormac¹; Siddhant Kumar²; Steve Connor³; Soumya Singdha Kundu¹; Theodore Barfoot¹; Aaron Kujawa¹; Tom Vercauteren¹; Jonathan Shapey¹; ¹King's College London; ²The Walton Centre NHS Foundation Trust, Liverpool, United Kingdom; ³King's College Hospital, London, United Kingdom

(S273) HEARING PRESERVATION SURGERY FOR VESTIBULAR SCHWANNOMA: ANALYSIS OF MID- AND LONG-TERM HEARING OUTCOMES
Diego Cazzador; Antonio Daloiso; Giulia Tealdo; Valerio M Di Pasquale Fiasca; Davide Brotto; Stefano Concheri; Antonio Mazzoni; Elisabetta Zanoletti; Otorhinolaryngology Unit - University of Padova

 

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(S292) DISCOVERY OF A NOVEL CEREBROSPINAL FLUID-SPECIFIC DNA APTAMER
Arash Abiri; Xinlei Chen; Brandon Latifi; Frank Hsu; Andrej Luptak; Michelle Khine; Edward Kuan; UC Irvine

(S293) COMPLICATION RATES OF FREE FLAP RECONSTRUCTION FOLLOWING SKULL BASE SURGERY
Eric M Wong, BS¹; Alexander Karabachev, MD¹; Grace Zhang, BA¹; Siddhant Triphathi, MD¹; Jack Garcia, BS¹; Adam Beucler, BS¹; Christine Lee, BA¹; Norberto Andaluz, MD¹; Ravi Samy, MD²; Lee A Zimmer, MD, PhD³; Yash Patil, MD¹; ¹University of Cincinnati College of Medicine; ²Lehigh Valley Health Network; ³Bon Secours Mercy Health

(S294) REDUCTION OF CEREBROSPINAL FLUID LEAKS IN IDIOPATHIC INTRACRANIAL HYPERTENSION WITH GLUCAGON-LIKE PEPTIDE-1 RECEPTOR AGONIST USE
Adam S Vesole, MD¹; Steven A Gordon, MD¹; Jonathan Forbes, MD²; Norberto Andaluz, MD²; Daniel Q Sun, MD¹; ¹Department of Otolaryngology-Head & Neck Surgery, University of Cincinnati College of Medicine; ²Department of Neurosurgery, University of Cincinnati College of Medicine

(S295) MACHINE LEARNING-BASED PREDICTION MODEL OF CSF LEAK IN SKULL BASE RECONSTRUCTION: A NOVEL APPROACH.
Rayan AlFallaj, MBBS; Abdulaziz Alrasheed, MBBS; King Saud University medical city

(S048) INTRAOPERATIVE CEREBROSPINAL FLUID LEAK DURING THE MIDDLE FOSSA REPAIR OF SUPERIOR CANAL DEHISCENCE
Hong-Ho Yang, BS; Cheikh Mballo, BS; Isaac Yang, MD; Quinton Gopen, MD; David Geffen School of Medicine at UCLA

(S296) EFFICACY OF SURGICAL MANAGEMENT FOR SPONTANEOUS MIDDLE CRANIAL FOSSA CSF LEAKS: A SYSTEMATIC REVIEW WITH META-ANALYSES
Jordan M Rasmussen; Daniel L Surdell; Geoffrey C Casazza; Anne K Maxwell; Cynthia M Schmidt; Harlan R Sayles; Mithun G Sattur; University of Nebraska Medical Center

(S297) TEMPORAL BONE ENCEPHALOCELES AND RELATED SIMULTANEOUS PROCEDURES
Neal Jackson; Tulane University

(S298) TRANSVERSE SINUS STENOSIS IN IDIOPATHIC INTRACRANIAL HYPERTENSION WITH SPONTANEOUS CEREBROSPINAL FLUID LEAKS: A SYSTEMATIC REVIEW AND META-ANALYSIS OF VENOUS SINUS STENTING OUTCOMES
Nathan A Luzum, BS¹; Anthony Ghanem, MD²; Nathan Sattah, BA¹; Mohammad Bilal Alsavaf, MD³; Somtochi Okafor, MD²; David Jang, MD²; Bradley Goldstein, MD²; Erik Hauck, MD⁴; Ralph Abi-Hachem, MD²; ¹Duke University School of Medicine; ²Department of Head and Neck Surgery & Communication Sciences, Duke University; ³Otolaryngology-Head and Neck Surgery, The James Cancer Hospital at the Wexner Medical Center of The Ohio State University College of Medicine; ⁴Department of Neurosurgery, Duke University

(S299) PNEUMOCOCCAL VACCINATION DOES NOT FULLY PROTECT AGAINST OTOGENIC MENINGITIS IN PATIENTS WITH TEGMEN DEFECTS
Ava Karam, BS¹; Isaac Erbele, MD²; Julio Figueroa, MD¹; Rahul Mehta, MD¹; Moises A Arriaga, MD, MBA¹; ¹LSUHSC; ²Brooke Army Medical Center San Antonio

(S300) SKULL BASE RECONSTRUCTION AND TREATMENT OF CRANIAL AND CEREBROVASCULAR INJURIES DUE TO GUNSHOT WOUNDS: OUTCOMES AND EXPERIENCE FROM A LEVEL 1 TRAUMA CENTER
Varadaraya S. Shenoy, MD; Laligam N Sekhar, MD; Harborview Medical Center, Univ. of Washington, Seattle

 

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(V113) ENDOSCOPIC TRANSORBITAL REMOVAL OF INTRAORBITAL AND INTRACRANIAL RETAINED VEGETAL FOREIGN BODY
Karim Estephan¹; Evan Kalin-Hajdu, MD, FRCSC²; Cecilia Contardi, MD²; Pascal Lavergne, MD, FRCSC³; ¹Faculty of Medicine, University of Montreal; ²Division of Ophtalmic Plastic Reconstructive Surgery, University of Montreal; ³Division of Neurosurgery, Sacred-Heart Hospital, University of Montreal

(V114) MACROVASCULAR DECOMPRESSION OF THE OPTIC NERVE: TECHNICAL CASE INSTRUCTION
Shravan C Atluri, MHA¹; Anthony Guidotti¹; Ethan Cline¹; Ondrej Choutka, MD²; ¹ICOM; ²Saint Alphonsus Regional Medical Center

(V116) TRANSORBITAL ENDOSCOPIC APPROACH FOR THE REMOVAL OF A TEMPORO-MESIAL CAVERNOUS HEMANGIOMA
Cesare Zoia¹; Vittorio Ricciuti²; Andrea Montalbetti¹; Giorgia Piras¹; Roada Bucpapaj¹; Elisabetta Peppucci¹; ¹Ospedale Moriggia Pelascini, Gravedona, Italy; ²Università Milano-Bicocca, Monza, Italy

(V117) OBLITERATION OF M1 PSEUDOANEURYSM WITH M2 TO M2 AND STA-M1 BYPASS FOR TBI
Shravan C Atluri¹; Ethan Cline¹; Anthony Guidotti¹; Ondrej Choutka, MD²; ¹ICOM; ²Saint Alphonsus Regional Medical Center

(V118) ORBITOPTERIONAL CRANIOTOMY, A3-A3 BYPASS, AND CLIP TRAPPING OF GIANT UNRUPTURED ANTERIOR COMMUNICATING ARTERY ANEURYSM
Kara A Parikh, MD; Nickalus R Khan, MD; University of Tennessee/Semmes Murphey

(V119) PRETEMPORAL-TRANSCAVERNOUS APPROACH FOR A RECURRENT ATYPICAL MENINGIOMA OF THE CAVERNOUS SINUS
Luca Mattioli, MD¹; Marco Schiariti, MD, Neurosurgeon²; Leonardo Maresca, MD¹; Edoardo Barbieri, MD¹; Riccardo Ciocca, MD¹; Jacopo Falco, MD, Neurosurgeon³; Francesco Restelli, MD, Neurosurgeon²; Morgan Broggi, MD, Neurosurgeon²; Paolo Ferroli, MD, Neurosurgeon²; ¹University Statale of Milan; ²Fondazione IRCCS Istituto Neurologico Carlo Besta; ³ASST Great Metropolitan Niguarda

(V109) MICROSURGICAL RESECTION AND ENDOVASCULAR EMBOLIZATION OF LEFT INFERIOR FRONTAL AND SYLVIAN SPETZLER-MARTIN GRADE 3 AVM
Kara A Parikh; Mustafa Motiwala, MD; Emal Lesha, MD; Johan Dugan, BA; Adam S Arthur, MD, MPH; Nickalus R Khan, MD; University of Tennessee/Semmes Murphey

 

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(S301) THE IMPACT OF LATERAL RIM OSTEOTOMY IN TRANSORBITAL APPROACHES: AN ANATOMICAL AND CLINICAL COMPARATIVE STUDY
Fabio Torregrossa, MD¹; Cesare Zoia, MD, PhD²; Daniele Bongetta, MD, PhD³; Megan Bauman, MS¹; Amedeo Piazza, MD¹; Miguel Saez-Alegre, MD, PhD¹; Luciano Leonel, PhD¹; Giovanni Grasso, MD, PhD⁴; Maria Peris-Celda, MD, PhD¹; ¹Mayo Clinic, Rochester, MN (USA); ²Neurosurgical Unit, Ospedale Moriggia Pelascini, Gravedona e Uniti, Italy; ³Neurosurgical Unit, Ospedale Fatebenefratelli e Oftalmico, ASST Fatebenefratelli Sacco, Piazzale Principessa, Milano, Italy; ⁴Neurosurgical Unit, Department of Biomedicine, Neurosciences and Advanced Diagnostics (BiND), University of Palermo, Palermo, Italy

(S302) EVOLUTION OF GLOBE POSITION OVER TIME FOLLOWING LATERAL TRANSORBITAL APPROACHES TO THE MIDDLE CRANIAL FOSSA
Quillan M Austria, MD¹; Shanlee M Stevens, MD¹; Allison Coombs, DO¹; Gary J Lelli, MD¹; Theodore H Schwartz, MD²; Kyle J Godfrey, MD¹; ¹Department of Ophthalmology, Weill Cornell Medicine, New York Presbyterian Hospital; ²Department of Neurological Surgery, Weill Cornell Medicine, New York Presbyterian Hospital

(S303) ENDONASAL ENDOSCOPIC ANATOMY OF OPTIC NERVE AND OPTHALMIC ARTERY IN OPTIC CANAL AND ORBITAL APEX
Suha Beton; Tugba Morali Guler; Hazan Basak; Cem Meco; Mehmet Yilmaz; Ayhan Comert; Gokmen Kahilogullari; Ankara University

(S304) CONTRALATERAL TRANSCARUNCULAR TRANSORBITAL ENDOSCOPIC APPROACH TO PETROUS APEX: A FEASIBILITY CADAVER STUDY
Hazan Basak; Suha Beton; Tugba Morali Guler; Mehmet Yilmaz; Ayhan Comert; Ankara University

(S305) IMPACT OF REMOVAL OF THE LATERAL ORBITAL RIM DURING ENDOSCOPIC TRANS-ORBITAL APPROACH (ETOA) ON INTRAORBITAL PRESSURE: A CADAVERIC STUDY.
Antonio Strangio, MD; Joel Davaine Sonfack; Marc-Olivier Comeau; Annie Moreau, MD; Martin Côté, MD; Pierre-Olivier Champagne, PhD, MD; Laval University Hospital Centre

(S306) TRANSORBITAL APPROACH AS APPLIED TO COMPLEX CRANIAL PATHOLOGY
Christos Profyris, MD, AProf; Helen Joseph Hospital/ Netcare Milpark Hospital

(S307) TRANSNASAL ORBITAL FOREIGN BODY REMOVAL: AN APPLICATION OF ARTIFICIAL INTELLIGENCE BASED SEMI-AUTOMATIC SEGMENTATION FOR PREOPERATIVE MODELING
Margaret Mitchell, MD, MSHPEd¹; Ryan Bartholomew¹; Angela Zhu²; Barak Ringel¹; Benjamin Bleier¹; Noel Ayoub¹; ¹Mass Eye and Ear/Harvard Medical School; ²Warren Alpert Medical School

(S308) ENDOSCOPIC ENDONASAL APPROACH TO THE INFEROLATERAL ORBITAL QUADRANT: AN ANATOMICAL CADAVERIC STUDY
Alejandra Rodas, MD; Leonardo Tariciotti, MD; Youssef M Zohdy, MD; Roberto M Soriano, MD; Emily Barrow, MD; Gustavo Pradilla, MD; John M DelGaudio, MD; Emory University

 

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(V121) ENDOSCOPIC ENDONASAL RESECTION OF SYNCHRONOUS RENAL CELL CARCINOMA METASTASIS AND GIANT PITUITARY NEUROENDOCRINE TUMOR: OPERATIVE VIDEO AND SURGICAL NUANCES
Guilherme Mansur, MD¹; Mohammad B Alsavaf, MD¹; Moataz D Abouammo, MD, MSc¹; Chandrima Biswas, MD¹; Pedro F Guimarães, MD²; Ricardo L Carrau, MD¹; Daniel M Prevedello, MD¹; ¹The Ohio State University; ²Hospital de Neurologia Santa Mônica

(V122) ACROMEGALY WITH EXTENSION TRACKING THE SYMPATHETIC CHAIN
Ali Palejwala; Vera Vigo, MD, PhD; Alix Bex, md; Matei A Banu, MD; Vladimir A Ljubimov, MD; Peter H Hwang, MD; Juan Carlos Fernandez-Miranda, MD; Stanford University

(V123) ENDOSCOPIC ENDONASAL RESECTION OF A GH AND PROLACTIN-SECRETING PIT-1 POSITIVE PITUITARY ADENOMA INVADING THE CAROTICO-CLINOID LIGAMENT
Matei A Banu, MD; Vera Vigo, MD, PhD; Vladimir A Ljubimov, MD; Zara M Patel, MD; Juan Carlos Fernandez-Miranda, MD; Stanford University

(V125) EXPANDED ENDOSCOPIC ENDONASAL APPROACH FOR RESECTION OF RESIDUAL PARASELLAR GROWTH HORMONE SECRETING PITUITARY ADENOMA IN A PATIENT WITH KISSING INTERNAL CAROTID ARTERIES: TECHNICAL NUANCES
Mustafa Motiwala¹; Patricio Gimenez²; Muhammad W Baqai²; Adam Williams²; Faisal Hasan²; Karin Bradley²; Alison Evans²; Warren Bennett²; Jahangir Sajjad²; Kumar Abhinav²; ¹University of Tennessee Health Science Center; ²Southmead Hospital

(V126) ENDOSCOPIC ENDONASAL TRANSCAVERNOUS APPROACH FOR REMOVAL OF PITUITARY MACROADENOMA WITH APOPLEXY: TECHNICAL NUANCES
Adnan H Shahid, MBBS, MS, MCh; Mehdi Khaleghi, MD; Sudhir Suggala, MBBS, MS, MCh; Danner Butler, BS; Garrett Dyess; Ursula Hummel, MHS, PAC; Mark Gacek, MD; Jai D Thakur, MD; University of South Alabama Mobile

(V127) ENDOSCOPIC ENDONASAL APPROACH FOR PITUITARY ADENOMA RESECTION WITH COMORBID FIBROUS DYSPLASIA
Kevin Fujita-Howie; Michael Ye, MD; Nader Delavari; Ashutosh Kacker, MD; Theodore Schwartz; Weill Cornell Medicine

(V128) AN ENDOSCOPIC ENDONASAL APPROACH FOR SELLAR GERM CELL TUMOR RESECTION
Bastien A Valencia-Sanchez, MD¹; Jeeho D Kim, MD²; Michael L Levy, MD, PhD³; Mariko Sato, MD, PhD⁴; John Crawford, MD⁴; Danielle Levy³; Sean P Polster, MD⁵; Vijay A Patel, MD³; ¹Tecnologico de Monterrey; ²Naval Medical Center San Diego; ³University of California San Diego, Rady Children's Hospital San Diego; ⁴University of California Irvine, Children's Hospital Orange County; ⁵University of Chicago

 

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(S310) OPTIC CANAL UNROOFING EXTENDS THE LATERAL REACH IN ENDOSCOPIC TRANSNASAL SURGERY FOR SUPRASELLAR LESIONS
Hirotaka Hasegawa, MD, PhD¹; Shunya Hanakita, MD, PhD¹; Yuki Shinya, MD, PhD²; Motoyuki Umekawa, MD²; Hideaki Ono, MD, PhD²; Naoyuki Shono, MD, PhD²; Taichi Kin, MD, PhD²; Hironobu Nishijima, MD, PhD³; Kenji Kondo, MD, PhD³; Nobuhito Saito, MD, PhD²; ¹Department of Neurosurgery, Saitama Medical Center, Saitama Medical University; ²Department of Neurosurgery, The University of Tokyo; ³Department of Otorhinolaryngology, The University of Tokyo

(S311) ORBITAL RIM REMOVAL IN ENDOSCOPIC TRANSORBITAL APPROACHES: UNVEILING INDICATIONS AND TECHNICAL NUANCES.
Won-Jae Lee, MD¹; Matteo D Notaris, PhD²; Toma Spiriev, PhD³; Kyung In Woo, PhD⁴; Doo-Sik Kong, PhD¹; ¹Department of Neurosurgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea; ²Neurosurgical Clinic A.O.U. "San Giovanni di Dio e Ruggi d'Aragona", University of Salerno and Laboratory of Neuroanatomy, EBRIS Foundation, European Biomedical Research Institute of Salerno, Salerno, Italy.; ³Department of Neurosurgery, Acibadem City Clinic University Hospital Tokuda, 1407 Sofia, Bulgaria.; ⁴Department of Ophthalmology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea

(S312) TRANSORBITAL NEUROENDOSCOPIC TRANSMAXILLARY APPROACH TO THE PTERYGOPALATINE FOSSA (TONES-TMAX): ANATOMICAL DESCRIPTION AND SURGICAL CASE ILLUSTRATION.
Juan Felipe Abaunza-Camacho, MD¹; Sara Gomez-Niebles, MD¹; Rafael Aponte-Caballero, MD²; Camilo Benavides-Burbano, MD³; Maximiliano Alberto Nunez, MD⁴; Humberto Madrinan-Navia, MD⁵; William M. Riveros-Castillo, MD, MSc²; Javier M. Saavedra, MD, MSc⁶; ¹Universidad del Rosario School of Medicine and Health Sciences, Bogota, Colombia; ²Department of Neurosurgery, Hospital Universitario Mayor Méderi, Bogotá, Colombia; ³Department of Neurosurgery, Hospital Universitario de la Samaritana, Bogotá, Colombia; ⁴Department of Neurosurgery, Hospital El Cruce, Buenos Aires, Argentina; ⁵Center for Research and Training in Neurosurgery; ⁶Center for Research and Training in Neurosurgery (CIEN), Bogotá, Colombia.

(S313) CONSIDERATIONS AND COMPLICATIONS ASSOCIATED WITH CRANIOTOMIES IN THE SITTING POSITION: A 10-YEAR SINGLE-CENTER RETROSPECTIVE SERIES
Ehsan Dowlati, MD; Danielle Golub, MD, MSCI; Alon Kashanian, MD; Sabastian Hajtovic; Alexander F Kuffer, MD, PhD; Kyriakos Papadimitriou, MD; Amir R Dehdashti, MD; North Shore University Hospital

(S314) A COMPARATIVE ANALYSIS OF THE CONTRALATERAL ENDOSCOPIC CORRIDORS TO THE JUGULAR TUBERCLE AS A COMPLEMENT TO THE ENDONASAL APPROACH.
Chandrima Biswas, MD; Moataz D Abouammo, MD; Guilherme Mansur, MD; Ludovica Pasquini, MD; Mohammad Bilal Alsavaf, MD; Daniel M Prevedello, MD, MBA; Ricardo L Carrau, MD, MBA; The Ohio State University Wexner Medical Center

(S315) EXPANDING THE LIMITS TO THE INFRATEMPORAL FOSSA AND PARAPHARYNGEAL SPACE THROUGH THE ENDOSCOPIC NASOFRONTAL TREPHINATION: A QUANTITATIVE CADAVERIC STUDY
Moataz D Abouammo, MD, MSc¹; Mohammad Bilal Alsavaf, MD¹; Maithrea S Narayanan, MBBS, MMED²; Guilherme Mansur, MD³; Chandrima Biswas, MD³; Rodrigo Gehrke, MD¹; Mahmoud F Abdelaziz, MD, PhD⁴; Magdy E Saafan, MD, PhD⁴; Noha E Shalaby, MD, MSc⁵; Mohamed Ammo, PharmB⁶; Kyle C Wu, MD³; Kyle K VanKoevering, MD¹; Daniel M Prevedello, MD, MBA³; Ricardo L Carrau, MD, MBA¹; ¹Department of Otolaryngology-Head and Neck Surgery, The Ohio State University Wexner Medical Center, Columbus, Ohio, USA; ²Department of Otolaryngology and Head–Neck Surgery, Hospital Kuala Lumpur, Jalan Pahang 50586 Kuala Lumpur, Wilayah Persekutuan Kuala Lumpur, Malaysia; ³Department of Neurological Surgery, The Ohio State University Wexner Medical Center, Columbus, Ohio, USA.; ⁴Department of Otorhinolaryngology-Head and Neck Surgery, Tanta University, Tanta, Egypt; ⁵Faculty of Medicine, Tanta University, Tanta, Egypt; ⁶The University of Western Ontario

(S316) APPLICATION OF INTRAOPERATIVE ULTRASOUND IN ENDOSCOPIC ENDONASAL RESECTION OF CRANIOPHARYNGIOMAS.
Chandrima Biswas, MD; Moataz D Abouammo, MD; Ludovica Pasquini, MD; Guilherme Mansur, MD; Mohammad Bilal Alsavaf, MD; Kyle C Wu, MD; Daniel M Prevedello, MD, MBA; Ricardo L Carrau, MD, MBA; The Ohio State University Wexner Medical Center

(S317) BRAINSTEM SURFACE MAPPING FOR IDENTIFICATION OF ENTRY ZONE IN CAVERNOUS MALFORMATION RESECTION
Ehsan Dowlati, MD¹; Alexander F Kuffer, MD, PhD¹; Eric T Quach, MD²; Kaitlyn Kelly¹; Danielle Golub, MD, MSCI¹; Amir R Dehdashti, MD¹; ¹North Shore University Hospital; ²Temple University

(S318) A COMPARATIVE ANALYSIS OF MANEUVERABILITY AT THE INFRATEMPORAL FOSSA: ADVANTAGES AND DRAWBACKS OF THE ENDOSCOPIC CONTRALATERAL TRANSMAXILLARY-TRANSPTERYGOID AND FISCH C APPROACHES
Alejandra Rodas, MD; Leonardo Tariciotti, MD; Jackson R Vuncannon, MD; Youssef M Zohdy, MD; Juan M Revuelta-Barbero; Roberto M Soriano, MD; Edoardo Porto, MD; Biren K Patel, MD; Emily Barrow, MD; Tomas Garzon-Muvdi, MD; Gustavo Pradilla, MD; C. Arturo Solares, MD; Emory University

 

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(S319) SINONASAL, NASOPHARYNGEAL, UPPER ORAL AND OROPHARYNGEAL CAVITY ADENOID CYSTIC CARCINOMA: AN INTERNATIONAL MULTI-CENTER RETROSPECTIVE STUDY ON 457 PATIENTS
Gloria Schiavo, MD¹; Mario Turri Zanoni¹; Davide Mattavelli²; Alessandro Vinciguerra³; Carlo Conti²; Giacomo Gravante¹; Ester Orlandi⁴; Barbara Vischioni⁴; Benjamin Verillaud³; Yunxia Sarah Guo⁵; Matt Lechner⁶; Valerie Lund⁶; Nathan Creber⁷; Daniele Borsetto⁷; Philippe Herman³; Ehab Y Hanna⁵; Paolo Gm Castelnuovo¹; Piero Nicolai⁸; Marco Ferrari⁸; ¹UNINSUBRIA; ²UNIBS; ³APHP; ⁴CNAO; ⁵MD Anderson Cancer Center; ⁶UCL; ⁷Cambridge University; ⁸UNIPD

(S320) ONCOLOGIC OUTCOMES IN NASOPHARYNGEAL CARCINOMA: INFLUENCE OF TREATMENT MODALITIES AND OTHER PROGNOSTIC FACTORS
Mohammad Bilal Alsavaf, MD¹; Matthew Marquardt, MS²; Moataz D. Abouammo, MD, MSc³; Dukagjin Blakaj, MD⁴; Priyanka Bhateja, MD⁵; Ricardo L. Carrau, MD, MBA¹; Kyle K. VanKoevering, MD⁶; Marcelo Bonomi, MD⁵; ¹Departments of Neurological Surgery and Otolaryngology-Head & Neck Surgery, The James Cancer Hospital at the Wexner Medical Center of The Ohio State University College of Medicine, Columbus, Ohio; ²The Ohio State University College of Medicine, Columbus, Ohio; ³Department of Otorhinolaryngology-Head and Neck Surgery, Tanta University, Tanta, Egypt; ⁴Division of Radiation Oncology, The Ohio State University Wexner Medical Center, Columbus, OH, 43210; ⁵Department of Internal Medicine, Division of Medical Oncology, The Ohio State University Wexner Medical Center, Columbus, OH, 43210, USA; ⁶Department of Otolaryngology-Head and Neck Surgery, The Ohio State University Wexner Medical Center, Columbus, Ohio, 43210, USA

(S321) CHARACTERIZING COMMON MUTATIONS IN NASOPHARYNGEAL CARCINOMAS: PATHWAYS TO TARGETED THERAPY DEVELOPMENT
Beau Hsia, BS¹; Gabriel Bitar, BS¹; Saif Alshaka, BS¹; Mariko Sato, MD, PhD²; John Crawford, MD²; Michael L Levy, MD, PhD³; Danielle Levy, MD³; Bastien A Valencia, MD⁴; Jeeho Kim, MD⁵; Farhoud Faraji, MD, PhD⁶; Vijay A Patel, MD⁶; Sean Polster, MD⁷; ¹Creighton University School of Medicine; ²Pediatrics, University of California Irvine; ³Department of Neurosurgery, University of California San Diego, Rady Children's Hospital - San Diego; ⁴Department of Otolaryngology - Head and Neck Surgery, Mayo Clinic, Jacksonville, Florida; ⁵Naval Medical Center San Diego; ⁶Division of Pediatric Otolaryngology, Rady Children's Hospital - San Diego; ⁷Department of Neurosurgery, University of Chicago

(S322) DECODING MUCOSAL MELANOMAS: GENETIC PROFILING FOR ADVANCED THERAPEUTIC STRATEGIES
Saif Alshaka, BS¹; Beau Hsia, BS¹; Gabriel Bitar, BS¹; Mariko Sato, MD, PhD²; John Crawford, MD²; Michael L Levy, MD, PhD³; Danielle Levy, MD³; Bastien Valecia, MD⁴; Jeeho Kim, MD⁵; Farhoud Faraji, MD, PhD⁶; Vijay A Patel⁶; Sean Polster, MD⁷; ¹Creighton University School of Medicine; ²Pediatrics, University of California Irvine; ³Department of Neurosurgery, University of California San Diego; ⁴Department of Otolaryngology - Head and Neck Surgery, Mayo Clinic; ⁵Naval Medical Center San Diego Department of Otolaryngology; ⁶Department of Otolaryngology - Head and Neck Surgery, University of California San Diego; ⁷Department of Neurosurgery, University of Chicago

(S323) VIRTUAL PLANNING AND COMPUTER-GUIDED SURGERY FOR RESECTION AND RECONSTRUCTION OF CRANIOMAXILLOFACIAL AND SKULL BASE TUMORS
Ibrahim M Elsharabasy, Consultant Oral and Maxillofacial Surgery¹; Tarek A Rayan, MD²; ¹Ain Shams University; ²Alexandria University Egypt

(S324) TEMPORO-MANDIBULAR JOINT PSEUDOGOUT AS A DIFFERENTIAL DIAGNOSIS OF SKULL BASE TUMOR : A SYSTEMIC REVIEW
Julie Rosuel, MD; Arnaud Damecourt; Julien Boetto, MD, PhD; CHU Montpellier

(S325) RESECTION OF JUVENILE NASOPHARYNGEAL ANGIOFIBROMA (JNA): A MAYO CLINIC EXPERIENCE
Hafsa D Aden; Brennan G Olson, MD, PhD; Jeffrey P Graves, MS; Eric J Moore, MD; Janalee K Stokken, MD; Joshua P Wiedermann, MD; Carlos D Pinheiro-Neto, MD, PhD; Mayo Clinic

(S327) APPLICATION ANALYSIS OF CEREBRAL REVASCULARIZATION IN THE TREATMENT OF SKULL BASE TUMORS INVOLVING INTERNAL CAROTID ARTERY
Xiao Guang Tong, MD; Tianjin Neurosurgical Research Institute

 

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(V129) ENDOSCOPIC ENDONASAL TRANSCLIVAL APPROACH WITH PITUITARY GLAND TRANSPOSITION FOR PETROCLIVAL MENINGIOMA RESECTION
Alejandra Rodas, MD; Leonardo Tariciotti, MD; Roberto M Soriano, MD; Youssef M Zohdy, MD; Juan M Revuelta-Barbero, MD, PhD; Edoardo Porto, MD; Emily Barrow, MD; Tomas Garzon-Muvdi, MD; C. Arturo Solares, MD; Gustavo Pradilla, MD; Emory University

(V130) EXPANDED ENDOSCOPIC ENDONASAL APPROACH TO TUBEROINFUNDIBULAR CRANIOPHARYNGIOMA WITH THIRD VENTRICULAR EXTENSION
Hussain Shallwani, MD¹; Muhammad Waqas, MD¹; Jaims Lim, MD¹; Jason M Davies, MD, PhD¹; Ryan McSpadden, MD²; Ayham Al Afif, MD, MSc²; Hanna N Algattas, MD¹; ¹University at Buffalo Jacobs School of Medicine; ²Roswell Park Cancer Institute

(V131) EXPANDED ENDOSCOPIC ENDONASAL RESECTION OF CALCIFIED CRANIOPHARYNGIOMA WITH STALK AND HYPOTHALAMIC PRESERVATION
Adam Nunn; Patricio Gimenez; Mahmoud Asad; Faisal Hassan; Naveen Setty; Warren Bennett; Kumar Abhinav; Southmead Hospital

(V132) ENDOSCOPIC TRANSSPHENOIDAL RESECTION OF A RETRO-INFUNDIBULAR CRANIOPHARYNGIOMA WITH PRESERVATION OF THE PITUITARY STALK: 2-DIMENSIONAL ENDOSCOPIC VIDEO
Alexander F Kuffer, MD, PhD; Danielle Golub, MD, MSCI; Mark B Chaskes, MD; Judd H Fastenberg, MD; Amir R Dehdashti, MD; Northwell Health

(V134) OPTIC APPARATUS DECOMPRESSION OF EXCESSIVE SUPRASELLAR PACKING - OPERATIVE VIDEO
M. Salman Ali, MD; Kenneth Byrd, MD; Fernando Vale, MD; Medical College of Georgia at Augusta University

(V135) ENDOSCOPIC OPTIC CANAL DECOMPRESSION - TRAUMATIC OPTIC NEUROPATHY
Antonio Strangio, MD; Jean-Michel Bourque, MD; Martin Côté, MD; Pierre-Olivier Champagne, PhD, MD; Laval University Hospital Centre

(V136) ENDOSCOPIC ENDONASAL 'HYPOTHALAMIC-SPARING' RESECTION OF A LARGE MULTI-CYSTIC CRANIOPHARYNGIOMA
Prakash Nair, Mch, Neurosurgery; Gowtham M; Akhilesh Gowda; Ashutosh Carpenter; Sree Chitra Tirunal Institute for Medical science and Technology, Trivandrum, Kerala, India

 

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(S328) THE MANAGEMENT OF ENDOSCOPIC ENDONASAL ICA INJURY WITH PROXIMAL AND DISTAL CONTROL-SURGICAL ANATOMY AND "LIVER CADAVER" MODEL SIMULATION
Limin Xiao, MD¹; Joaquin Chuang, MD²; Ludovico Agostini, MD²; Jonathan Rychen, MD²; Yuanzhi Xu, MD²; Vera Vigo, MD²; ¹Jiangxi Cancer Hospital; ²Stanford University

(S329) CRANIAL RECONSTRUCTION FOR INFILTRATIVE MENINGIOMA USING 68GA-DOTATATE PET/CT AND IPS CASEDESIGNER®: A CASE SERIES
Connor C Jacob, MS; Ludovica Pasquini, MD; Daniel M Prevedello, MD; The Ohio State University

(S330) ASSESSING CHIASM PERFUSION AND VISUAL FUNCTION WITH SUPERIOR HYPOPHYSEAL ARTERY INDOCYANINE GREEN ANGIOGRAMS DURING ENDOSCOPIC ENDONASAL SURGERY
Robert C Osorio, MD; Ivan H El-Sayed, MD; José Gurrola II, MD; Ezequiel Goldschmidt, MD, PhD; University of California San Francisco

(S331) REAL-TIME INTRAOPERATIVE ULTRASOUND IMAGING OF THE POSTERIOR PITUITARY GLAND DURING ENDOSCOPIC ENDONASAL SKULL BASE SURGERY
Ryan B Juncker¹; Guilherme Finger, MD²; Mark A Damante, MD²; Luciano M Prevedello, MD³; Daniel M Prevedello, MD²; Kyle C Wu, MD²; ¹The Ohio State University College of Medicine, Medical Scientist Training Program; ²The Ohio State University Wexner Medical Center, Department of Neurosurgery; ³The Ohio State University Wexner Medical Center, Department of Radiology

(S332) RESECTION OF PITUITARY ADENOMAS WITH SUBARACHNOID INVASION: ARTIFICIAL INTELLIGENCE ANALYSIS OF SURGICAL TECHNIQUE
Jonathan B Lamano, MD, PhD; Ana Sofia Alvarez, MD; Dhiraj J Pangal, MD; Michael T Chang, MD; Juan Carlos Fernandez-Miranda, MD; Stanford University

(S333) TAILORED TRACTION AND NEUROPHYSIOLOGY MONITORING HELP PRESERVING THE FRONTOTEMPORAL BRANCHES OF THE FACIAL NERVE DURING CRANIAL BASE APPROACHES
Daniel Quintana, BA¹; Wesley Shoap, MD²; Robert Osorio, MD¹; Rithvik Ramesh, BA¹; Aymen Kabir, BA¹; Christian Jimenez, BS¹; Ezequiel Goldschmidt, MD, PhD¹; ¹Department of Neurological Surgery, University of California, San Francisco, San Francisco, California, USA.; ²Departments of Neurosurgery, Louisiana State University Health New Orleans, New Orleans, LA, USA

(S334) PREDICTORS OF 30-DAY POSTOPERATIVE MORBIDITY AND MORTALITY IN SKULL-BASE SURGICAL APPROACHES BY ANATOMICAL SUBSITE: A NSQIP ANALYSIS
Asha Krishnakumar, BA¹; Ashwin Ghadiyaram, BS¹; Hayden M Dux, BS¹; William C Broaddus, MD, PhD²; ¹Virginia Commonwealth University School of Medicine; ²Virginia Commonwealth University Department of Neurosurgery

(S335) ENHANCING SURGICAL VIDEO PHASE RECOGNITION WITH ADVANCED AI MODELS FOR ENDOSCOPIC PITUITARY TUMOR SURGERY
Jack Cook¹; Jonathan Chainey, MD, MSc²; Ruth Lau, MD³; Margaux Masson-Forsythe¹; Ayesha Syeda¹; Kaan Duman¹; Daniel Donoho, MD⁴; Dhiraj A Pangal⁵; Juan Vivanco Suarez⁶; ¹Surgical Data Science Collective, Washington, D.C., USA; ²Division of Neurosurgery, Department of Surgery, University of Toronto, Toronto, Ontario, Canada.; ³Division of Neurosurgery, Department of Surgery, University of Toronto, Toronto, Ontario, Canada. Division of Neurosurgery, Joan XXIII University Hospital, Tarragona, Spain; ⁴Surgical Data Science Collective, Washington, D.C., USA. Children's National Hospital, Washington, D.C., USA; ⁵Department of Neurosurgery, Stanford University, Stanford, C.A., USA; ⁶University of Iowa, Iowa City, I.A., USA

(S336) APPLICATION OF ARTIFICIAL INTELLIGENCE FOR PEER REVIEW OF SKULL BASED ARTICLES
Ali A Mohamed, MS¹; Daniel Colome¹; Jack Yang¹; Emma Sargent¹; Brandon Lucke-Wold, MD, PhD²; ¹Charles E. Schmidt College of Medicine, Florida Atlantic University; ²Lillian S. Wells Department of Neurosurgery, University of Florida

 

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(S337) SURGICAL ANATOMY OF THE SUPRAORBITAL AND MINIPTERIONAL APPROACHES: A STEPWISE COMPARATIVE STUDY
Fabio Torregrossa, MD; Alessandro De Bonis, MD; Amedeo Piazza, MD; Luciano Leonel, PhD; Megan Bauman, MS; Michael J. Link, MD, PhD; Giuseppe Lanzino, MD; Maria Peris-Celda, MD, PhD; Mayo Clinic, Rochester, MN (USA)

(S338) AN ANATOMICAL STUDY OF TRANSCRANIAL AND ENDOSCOPIC APPROACHES TO THE PONS: A 360º PERSPECTIVE
Yasaman Alam, MD¹; Luciano Leonel, PhD²; Megan Bauman, BS²; Maria Peris-Celda, MD, PhD²; ¹Department of Neurosurgery, University of Alabama at Birmingham, Birmingham, AL, USA; ²Rhoton Neurosurgery and Otolaryngology Surgical Anatomy Program, Mayo Clinic, Rochester, Minnesota, USA

(S340) ANALOG CLOCK AS A ROAD MAP TO THE CRANIAL NERVES OF THE CEREBELLOPONTINE ANGLE
Amedeo Piazza, MD, PhDs; Yohan Alexander, BA; Fabio Torregrossa, MD; Luciano L Leonel, PhD; Michael Link; Maria Peris Celda, MD, PhD; Mayo Clinic

(S342) QUANTITATIVE ANATOMICAL COMPARISON OF MICROSURGICAL TRANSCRANIAL, ENDOSCOPIC ENDONASAL, AND ENDOSCOPIC-ASSISTED TRANSORBITAL APPROACHES TO THE ORBIT AND SURROUNDING SKULL BASE REGIONS
Edoardo Agosti¹; Marco Valentini²; Mario Turri-Zanoni²; Marco Ravanelli¹; Barbara Buffoli¹; Marco Maria Fontanella¹; Francesco Doglietto³; ¹University of Brescia; ²Insubria University; ³Policlinico Gemelli Roma

(S343) INDICATIONS AND TECHNIQUES FOR POSTERIOR PITUITARY BIOPSY
Kyly Hiatt, BS; Thomas Hanks, BS; Spencer Raub, BA; Jessica Eaton; Kaity Hartl, MS, PAC; Dominic Nistal, MD; Fatima El-Ghazali, MD; Aria Jamshidi, MD; Manuel Ferreira, MD, PhD; Jacob Ruzevick, MD; Samuel Emerson, MD, PhD; University of Washington

(S344) ANATOMICAL STEP-BY-STEP DISSECTION OF COMPLEX SKULL BASE APPROACHES FOR TRAINEES: MEDIAL CAVERNOUS SINUS WALL RESECTION
A. Yohan Alexander¹; Ramin A Morshed, MD²; Carlos D Pinheiro Neto, MD, PhD¹; Maria Peris-Celda, MD, PhD¹; ¹Mayo Clinic; ²University of California San Francisco

(S345) MEASUREMENTS OF THE FRONTAL SINUS IN CORRELATION TO TRANS FRONTAL SINUS KEYHOLE APPROACHES TO THE ANTERIOR SKULL BASE
Miguel Saez-Alegre, MD, PhD; Antonio Bon Nieves, BS; Lazaro Peraza, MD; Carlos Pinheiro Neto, MD, PhD; Mayo Clinic, Rochester, MN, USA

 

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(S347) ENDOSCOPE-ASSISTED MICROVASCULAR DECOMPRESSION IN HEMIFACIAL SPASM - TECHNIQUE AND OUTCOME
Henry W Schroeder, MD; Ahmed Al Menabbawy, MD; Marc Matthes, MSc; Martin Weidemeier, MD; Mariam A Al Mutawa; Ehab El Refaee, MD; Department of Neurosurgery, University Medicine Greifswald

(S349) COMPARING POSTOPERATIVE STROKE INCIDENCE IN MOYAMOYA DISEASE: SINGLE-BARREL VS. DOUBLE-BARREL STA-MCA BYPASS - A META-ANALYSIS
David Cho, BS; Vincent Dieu, MS; Cory Greer, BS; Gerardo Duran, BS; Michael Feldman, MD; Andrew M Bauer, MD; Christopher S Graffeo, MD, MS; University of Oklahoma College of Medicine

(S350) SUPRAORBITAL KEYHOLE APPROACH AS APPLIED TO CLIPPING OF RUPTURED INTRACRANIAL ANEURYSMS - LESSONS FROM A RESOURCE LIMITED SETTING
Christos Profyris, MD, AProf; Helen Joseph Hospital/ Netcare Milpark Hospital

(S351) TEMPORARY BALLOON OCCLUSION FOR UNRUPTURED PARAOPHTHALMIC ANEURYSMS DURING MICROSURGICAL CLIPPING
Ehsan Dowlati, MD; Seok Y Oh, MD; Ahmad A Ballout, MD; Timothy G White, MD; Danielle Golub; Brendan Huang; Henry Woo, MD; Athos Patsalides, MD, MPH; Avi A Setton, MD; Jeffrey M Katz; Amir R Dehdashti, MD; North Shore University Hospital

(S352) PEDIATRIC AVM-ASSOCIATED ANEURYSMS: 35-YEAR PITTSBURGH EXPERIENCE
Rachel C Jacobs, MD¹; Akanksha Chilukuri, BS¹; Hussam Abou-Al-Shaar, MD¹; Joseph H Garcia, MD¹; Prateek Agarwal, MD¹; Michael M McDowell, MD¹; Alhamza R Al-Bayati, MD¹; Stephanie Greene, MD²; ¹University of Pittsburgh Medical Center; ²Duke Children's Hospital

(S353) THE C2-P2 BYPASS: TECHNICAL ASSESSMENT OF PETROUS CAROTID ARTERY TO POSTERIOR CEREBRAL ARTERY INTERPOSITIONAL BYPASS THROUGH THE COMBINED TRANSCOCHLEAR-SUBTEMPORAL APPROACH AS A PART OF MICROSURGICAL TREATMENT FOR DOLICHOECTATIC VERTEBROBASILAR ARTERY ANE
Ali Tayebi Meybodi, MD; Andrea L Castillo, MD; Gerardo Gomez-Castro; Michael T Lawton, Md; Mark C Preul, MD; Barrow Neurological Institute

(S355) PERFUSION-BASED CADAVERIC MODEL USING AN ENDOVASCULAR BALLOON CATHETER TO MANAGE ICA INJURY VIA AN ENDOSCOPIC ENDONASAL APPROACH.
Dilan Ozaydin, MD; Vera Vigo, MD, PhD; Limin Xiao, MD; Joaquin Chuang, MD; Juan Carlos Fernandez Miranda, MD; Stanford

 

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(S356) SINONASAL AND CHEMOSENSORY QUALITY OF LIFE FOLLOWING ENDOSCOPIC ENDONASAL SKULL BASE SURGERY
Rachel A Stemme, BS¹; Anmol Warman, BS¹; Varun Vohra, BA¹; Hayden Dux, BS²; Debraj Mukherjee, MD, MPH³; Nicholas R Rowan, MD⁴; ¹Johns Hopkins University School of Medicine, Baltimore, Maryland, USA; ²Virginia Commonwealth University School of Medicine, Richmond, Virginia, USA; ³Department of Neurological Surgery, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA; ⁴Department of Otolaryngology-Head and Neck Surgery, Johns Hopkins University, Baltimore, Maryland, USA

(S357) HEARING LOSS AFTER MICROVASCULAR DECOMPRESSION SURGERY PERFORMED WITH THE RETRO-MASTOID SUBOCCIPITAL APPROACH: A SINGLE-CENTER STUDY, ANALYSIS OF 682 CASES
HyunSeok Lee, MD¹; Kwan Park, MD, PhD¹; Sang-Ku Park¹; Dong-Han Lee, MD²; ¹Konkuk University Medical Center, Department of Neurosurgery; ²Konkuk University Medical Center, Department of Otorhinolaryngology

(S358) RISK-STRATIFICATION OF PATIENTS UNDERGOING ENDOSCOPIC ENDONASAL APPROACH FOR LESIONS INVOLVING THE INFRATEMPORAL FOSSA BY USE OF PRE-OPERATIVE MRI FINDINGS TO PREDICT DEVELOPMENT OF POST-OPERATIVE TRISMUS
Kelly E Daniels, MD; Nana-Hawwa Abdul-Rahman, BS; Georgios A Zenonos, MD; Paul A Gardner, MD; Garret W Choby, MD; Carl H Snyderman, MD, MBA; Barton F Branstetter, MD; Eric W Wang, MD; University of Pittsburgh

(S359) SMARTPHONE AND WEARABLE ACTIVITY MONITORING OF MOBILITY CHANGES: A MARKER OF RECOVERY AFTER SKULL BASE SURGERY
Ronald Wang, BS; Carter Suryadevara, MD; Justin Cottrell, MD; Ilona Cazorla-Morales, BA; Demetria Walker, BS; Emily Kay-Rivest, MD; Seth Lieberman, MD; Janine D'Agrosa, ANPBC; Daniel Jethanamest, MD; David R Friedmann, MD; Sean O McMenomey, MD; J. Thomas Roland Jr., MD; Chandra Sen, MD; John G Golfinos, MD; Donato R Pacione, MD; NYU Langone Health

(S360) QUALITY OF LIFE AND ITS ASSESSMENT IN PATIENTS WITH SPHENOORBITAL MENINGIOMAS
Nikolay Lasunin; Anna Kadasheva; Abdulla Abdullaev; Yulia Strunina; Burdenko Neurosurgical Center

(S361) PULMONARY COMPLICATIONS IN ENDOSCOPIC SKULL BASE SURGERY - A PROSPECTIVE STUDY
Nana-Hawwa Abdul-Rahman, MS¹; Brandon R Rosvall²; Georgios A Zenonos, MD³; Paul A Gardner, MD³; Garret W Choby, MD²; Eric W Wang, MD²; Carl Snyderman, MD, MBA²; ¹University of Pittsburgh School of Medicine; ²Department of Otolaryngology, University of Pittsburgh School of Medicine; ³Department of Neurosurgery, University of Pittsburgh School of Medicine

(S362) HEALTH LITERACY IN THE ANTERIOR SKULL BASE POPULATION - DEMOGRAPHIC, SURGICAL, AND SYMPTOM-RELATED FACTORS
Jakob L Fischer, MD; Cheikh A Mballo, MA; Marvin Bergsneider, MD; Won Kim, MD; Jeffrey D Suh, MD; Daniel M Beswick, MD; Jivianne T Lee, MD; Marilene B Wang, MD; University of California, Los Angeles (UCLA)

(S363) THE CRANIOPHARYNGIOMA QUALITY OF LIFE (C-QOL) INDEX: A PRELIMINARY PATIENT-CENTERED, DISEASE-SPECIFIC QUALITY OF LIFE INSTRUMENT FOR PATIENTS WITH CRANIOPHARYNGIOMAS
Saket Myneni¹; Hanan Akbari¹; Raquel Mayne¹; Ali K Ahmed, MD¹; Foad Kazemi, MD¹; Nathan T Zwagerman, MD²; Shirley Y Su, MBBS³; Eric W Wang, MD⁴; Garret W Choby, MD⁴; Erin L McKean, MD⁵; Carl H Snyderman, MD, MBA⁴; Nicholas R Rowan, MD¹; Debraj Mukherjee¹; ¹Johns Hopkins University; ²Medical College of Wisconsin; ³MD Anderson Cancer Center; ⁴University of Pittsburgh Medical Center; ⁵University of Michigan Health

(S364) DISCREPANCY BETWEEN SUBJECTIVE AND OBJECTIVE OLFACTORY FUNCTION IN PATIENTS UNDERGOING ENDOSCOPIC ENDONASAL SKULL BASE SURGERY: IMPACT OF PRIOR SARS-COV-2 INFECTION
Bastien A Valencia-Sanchez, MD; Alaa Alhalabi, MD; Prishae Wilson, BS; Natasha Najmi, BS; Angela M Donaldson, MD; Department of Otolaryngology - Head and Neck Surgery, Mayo Clinic Florida

 

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(S365) OUTCOMES FOLLOWING SURGICAL RESECTION OF TRIGEMINAL SCHWANNOMAS: A SYSTEMATIC REVIEW AND META-ANALYSIS
Constantine Karras¹; Pavlos Texakalidis²; Vineeth Thiranivu²; Khizar Nandoliya²; Rushmin Khazanchi²; Kayla Byrne²; Kyle Wu¹; Daniel Prevedello¹; James Chandler²; Stephen Magill²; ¹Ohio State University; ²Northwestern University

(S366) EXPANDED ENDOSCOPIC ENDONASAL APPROACHES TO THE MAXILLARY SINUS AND MEDIAL MIDDLE CRANIAL FOSSA
Yun-Kai Chan, MD¹; Kai-Chun Lin, MD¹; Po-Kai Huang, MD²; Chia-Hsing Lin, MD²; Ying-Piao Wang, MD, PhD²; ¹Department of Neurosurgery, MacKay Memorial Hospital, Taipei, Taiwan; ²Department of Otolaryngology-Head and Neck Surgery, MacKay Memorial Hospital, Taipei, Taiwan

(S367) NEUROPHYSIOLOGICAL MONITORING IN ENDOSCOPIC MIDDLE SKULL BASE SURGERY: A INITIAL CLINICAL EXPERIENCE
Simona Serioli, MD¹; Ginevra Federica D'Onofrio, MD²; Michele Di Domenico, BS²; Federico Valeri, MD²; Laura Broglio, MD¹; Ludovico Agostini, MD²; Marco Maria Fontanella, MD¹; Alessandro Olivi, MD²; Francesco Doglietto, MD, PhD²; ¹University of Brescia; ²Università del Sacro Cuore, Fondazione Policlinico Gemelli, Rome, Italy

(S369) ANATOMICAL STEP-BY-STEP DISSECTION OF COMPLEX SKULL BASE APPROACHES FOR TRAINEES: SURGICAL ANATOMY OF THE EXTRADURAL PRETEMPORAL TRANSCAVERNOUS APPROACH
Pedro Plou¹; Simona Serioli¹; Alex Yohan Alexander¹; Luciano Leonel¹; Pablo Ailer²; Jorge Rasmussen³; Maria Peris-Celda¹; ¹Mayo Clinic Rhoton Neurosurgery and Otolaryngology Surgical Anatomy Program, Rochester, MN, USA; ²Department of Neurosurgery, Hospital Italiano de Buenos Aires, Buenos Aires, Argentina.; ³Department of Neurosurgery, Hospital Español, Mendoza, Argentina

(S370) ENDOSCOPIC TRANSORBITAL APPROACH FOR SELECT RECURRENT AND NEWLY DIAGNOSED ANTEROMEDIAL TEMPORAL LOBE GLIOMAS
Jonathan A Tangsrivimol, MD; Nader Delavari, MD; Kyle Godfrey, MD; Thoedore H Schwartz, MD; Weill Cornell Medicine

(S371) ACCESSING THE LATERAL COMPARTMENT OF THE CAVERNOUS SINUS VIA THE ENDOSCOPIC ENDONASAL CORRIDOR: TECHNICAL NOTE AND INSTITUTIONAL CLINICAL EXPERIENCE.
I-sorn Phoominaonin¹; Maria Karampouga¹; Eric Wang²; Garret Choby²; Carl H Snyderman²; Paul A Gardner¹; Georgios A Zenonos¹; ¹Department of Neurological Surgery, Center for Cranial Base Surgery, University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania, USA; ²Department of Otolaryngology, Center for Cranial Base Surgery, University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania, USA

(S372) TWO DECADES OF SKULL BASE CHONDROSARCOMA MANAGEMENT: INSIGHTS FROM LARIBOISIÈRE HOSPITAL
Jonathan Chainey, MD, MSc; Konstantina Kavoura, MD; Jerold Justo, MD; Arianna Fava, MD; Thibault Passeri, MD; Sebastien Froelich, MD, PhD; Lariboisière Hospital, Assistance Publique-Hôpitaux de Paris, University of Paris

(S373) SURGICAL MANAGEMENT OF SYMPTOMATIC HEMANGIOMA OF THE GENICULATE GANGLION: FASCICULAR-SPARING RESECTION OR GRAFTING?
Alice Giotta Lucifero¹; Sabino Luzzi²; Paulo Abdo do Seixo Kadri³; Ossama Al-Mefty¹; ¹Harvard Medical School; ²University of Pavia; ³Universidade Federal do Paraná, Curitiba, Brazil

 

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(S374) INTRACRANIAL STENTING AND BYPASS HAVE SIMILAR NATIONWIDE OUTCOMES FOR TREATMENT OF INTRACRANIAL ATHEROSCLEROTIC DISEASE: A PROPENSITY-SCORE MATCHED ANALYSIS
Michael G Brandel, MD¹; Alexander A Khalessi, MD¹; Robert C Rennert, MD²; ¹University of California, San Diego; ²University of Utah

(S375) ENHANCED RECOVERY AFTER SURGERY (ERAS) PROTOCOL FOR MICROVASCULAR DECOMPRESSION IN TRIGEMINAL NEURALGIA: A RETROSPECTIVE MATCHED COHORT STUDY
Mohammadmahdi Sabahi, MD, MPH¹; Hadi Sultan, BS²; Shadi Bsat, MD¹; Abdulrahman Albakr, MD¹; Badih Adada, MD¹; Hamid Borghei-Razavi, MD¹; ¹Department of Neurological Surgery, Pauline Braathen Neurological Center, Cleveland Clinic Florida; ²Charles E. Schmidt College of Medicine, Florida Atlantic University, Boca Raton, FL, USA

(S377) LENGTH OF TRANSVERSE SINUS COVERED BY STENT IS AN INDEPENDENT PREDICTOR OF IMPROVED VISUAL OUTCOMES FOLLOWING VENOUS SINUS STENTING IN PATIENTS WITH IDIOPATHIC INTRACRANIAL HYPERTENSION
Vinay Jaikumar, MD; Jaims Lim, MD; Kunal Raygor, MD; Hamid S Khan, MNBBS; Andre Monteiro, MD; Megan D Malueg, BS; Justin Im, BS; Hanna N Algattas, MD; Adnan H Siddiqui, MD, PhD; University at Buffalo Neurosurgery

(S378) LONG-TERM OUTCOMES OF MICROVASCULAR DECOMPRESSION FOR TRIGEMINAL NEURALGIA IN PATIENTS WITH MULTIPLE SCLEROSIS: A SYSTEMATIC REVIEW
Hadi Sultan, BS¹; Hediye Gholamshahi, MD, MPH²; Mohammadmahdi Sabahi, MD, MPH³; Badih Adada, MD³; Hamid Borghei-Razavi, MD³; ¹Charles E. Schmidt College of Medicine, Florida Atlantic University, Boca Raton, FL, USA; ²Department of Neurosurgery, Tehran University of Medical Sciences, Tehran, Iran.; ³Department of Neurological Surgery, Pauline Braathen Neurological Centre, Cleveland Clinic Florida, Weston, Florida, USA.

(S379) TREATMENT AND PRESENTATION OF DURAL ARTERIOVENOUS FISTULAS FED BY THE ARTERY OF DAVIDOFF AND SCHECHTER: A SCOPING REVIEW OF THE LITERATURE
Estefana Bcharah; Maria José Pachón-Londoño, MD; Vita Olson; Maged T Ghoche, MD; Abhijith R Bathini, MD; Charbel Moussalem, MD; Devi P Patra, MD; Bernard R Bendok, MD, MSCI; Mayo Clinic

(S381) THE EVOLUTION OF GIANT INTRACRANIAL ANEURYSM TREATMENT - A SINGLE INSTITUTION RETROSPECTIVE REVIEW OF 156 PATIENTS
Kate Jensen¹; Redi Rahmani, MD²; Christopher Chang²; Brian Paul¹; Adam Eberle²; Anna Huguenard, MD²; Michael Lawton, MD²; ¹Creighton University School of Medicine; ²Barrow Neurological Institution

(S382) SUPRAORBITAL KEY-HOLE APPROACH FOR INTRACRANIAL ANEURYSMS: TECHNIQUE AND FEASABILITY IN 54 CASES
Jose Carlos Rodrigues Jr, MD; Vithor Ely Bortolin da Silva, MD; Marcelo Ferraz de Campos, MD; Pedro Felipe Ferreira; Heliopolis Hospital

 

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(S383) UTILITY OF ENDOSCOPIC ENDONASAL CYST FENESTRATION AND MARSUPIALIZATION IN THE TREATMENT OF PEDIATRIC CRANIOPHARYNGIOMA
David K Lerner, MD¹; Dominick Rich, BA²; Alan D Workman, MD, MTR³; Sanjena Venkatesh²; Sarah Barnett, BA²; Jacob Eide, MD⁴; Adam J Kundishora, MD⁵; Jennifer E Douglas, MD²; Michael A Kohanski, MD, PhD²; James N Palmer, MD²; Nithin D Adappa, MD²; Phillip Storm, MD⁵; ¹University of Miami; ²University of Pennsylvania; ³Massachusetts Eye and Ear Infirmary; ⁴Mayo Clinic; ⁵Children's Hospital of Philadelphia

(S384) FULLY ENDOSCOPIC COMBINED ENDONASAL AND TRANSORAL APPROACH TO SKULL BASE TUMORS AT THE CRANIOVERTEBRAL JUNCTION
Ana Sofia Alvarez, MD; Maria Jose Cavagnaro, MD; Joaquin Chuang, MD; Jonathan B Lamano, MD, PhD; Matei A Banu, MD; Juan C Fernandez-Miranda, MD; Stanford University

(S386) THE WEILL CORNELL SKULL BASE AND MICRONEUROSURGERY SKILLS-BASED NEUROSURGERY FELLOWSHIP EXPERIENCE: A 20-YEAR RETROSPECTIVE
Travis Atchley¹; Alexander Evins²; Laura Baeza - Antón²; Philip Stieg²; Antonio Bernardo²; ¹University of Alabama at Birmingham Health System; ²Weill Cornell Medicine

(S038) THE NATURAL HISTORY OF RESIDUAL PITUITARY ADENOMAS AND RISK FACTORS ASSOCIATED WITH TUMOR PROGRESSION AFTER PREVIOUS SURGICAL TREATMENT
Leandro Amaral, MSc¹; Alexandre Giannetti, PhD¹; Daniel Prevedello²; Guilherme Finger²; Isabela Souza¹; ¹Universidade Federal de Minas Gerais; ²Ohio State University

(S387) AN ALGORITHMIC APPROACH TO RESECTION OF NASAL DERMOIDS WITH INTRACRANIAL EXTENSION
Jeffery May, MD¹; Travis Clarke, MD¹; Sanjeet Rangarajan, MD²; L Madison Michael 2nd, MD¹; Anas Eid, MD¹; ¹University of Tennessee Health Science Center - Memphis; ²University Hospitals Otolaryngology

(S388) ENDOSCOPIC SUBPERICHONDRAL TRANSSEPTAL (STRAS) ACCESS FOR TRANSSPHENOIDAL TRANSTUBERCULUM APPROCHES TO THE SKULL BASE : SURGICAL TECHNIQUE AND RESULTS IN A PROSPECTIVE SERIES
Julien Boetto, MD, PhD; Marine Le Corre, MD; Valentin Favier, MD, PhD; CHU Montpellier

(S389) THE CAROTICOCLINOID LIGAMENT IN ENDOSCOPIC ENDONASAL TRANSCAVERNOUS SURGERY: ANATOMICAL VARIATIONS, OPERATIVE TECHNIQUES AND CASE SERIES
Jonathan Rychen; Yuanzhi Xu; Ludovico Agostini; Felipe Constanzo; Muhammad Reza Arifianto; Alix Bex; Limin Xiao; Vera Vigo; Juan Carlos Fernandez-Miranda; Stanford University