Annual Meeting Schedule

Michael Link, Siviero Agazzi, Clementino Arturo Solares, Walavan Sivakumar, Dukagjin M Blakaj

Laligam Sekhar, Jean Anderson Eloy, Shaan M. Raza, Aashish Bhatt, Scott Okuno

Jamie Joseph Van Gompel, Gary L Gallia, Shirley Y. Su, Jeffrey R Janus, Robert Foote

Bernard R. Bendok, Amin B Kassam, Erin L. McKean, Matthew G Ewend, Arjun Parasher

Ossama Al-Mefty, Gelareh Zadeh, Franco DeMonte, T. Jonathan Yang

James K. Liu, J. Thomas Roland, Michael Chicoine, Tyler James Kenning, Marcos Tatagiba, Brendan P O`Connell

Lola B. Chambless, Norbert Liebsch, Shaan M. Raza, Chandranath Sen

Zoukaa Sargi, Mark Varvares, Jong Park, Jenny Yu, Brian David Thorp, Christopher H. Rassekh, Michael G Moore

Carl Snyderman, Rick Friedman, Cristine N Klatt-Cromwell, Adam Folbe, Stephen C Hernandez

Ali Jamshidi, Paul A. Gardner, Fred Gentili, Walter Jean, Ehab Hanna, Pablo F. Recinos

• Presidential Address
• Research Grant Committee Update
• Honored Guest Speakers

Ricardo Carrau, Howard Krauss, Michael Link, Shaan M. Raza, Anand K. Devaiah, Daniel Nuss, Laligam Sekhar,

Jenny Yu, Doo-Sik Kong, Kris Moe, Andrei Koerbel

Mindy Robyn Rabinowitz, Cristine N Klatt-Cromwell, Jarrett Elbert Walsh

Anil Nanda, Deanna Sasaki-Adams, Adam Folbe, Christina Henson, Annie Moreau

Tal Rubinstein, Janalee K Stokken, Raymond I Cho, Andrei Koerbel, Kris Moe, Alessandro Paluzzi

Charles S. Ebert, Ramon Moreno-Luna, Patrick Michael Colley, Griffin D Santarelli, Allan D. Vescan, Samip N Patel

Maria Peris Celda, Ralph Abi Hachem, Garni Barkhoudarian, Russell Lonser, Tyler James Kenning

Alejandro Monroy-Sosa, Clementino Arturo Solares, Carl Snyderman, Diego Mendez Rosito, Ossama Al-Mefty, Amir R. Dehdashti

Extra Mayo, Please vs. Miami Vice

001: PRIMARY VISUAL CORTICAL THICKNESS CORRELATES WITH VISUAL FIELD DEFECTS IN PATIENTS WITH PITUITARY MACROADENOMAS: A STRUCTURAL 7 TESLA RETINOTOPIC ANALYSIS – John W Rutland¹, Bradley N Delman¹, Kuang-Han Huang¹, Gaurav Verma¹, Noah C Benson², Dillan F Villavisanis¹, Hung-Mo Lin¹, Joshua B Bederson¹, James Chelnis¹, Priti Balchandani¹, Raj K Shrivastava¹; ¹Icahn School of Medicine at Mount Sinai, ²New York University

002: 7 TESLA DIFFUSION-WEIGHTED MRI APPARENT DIFFUSION COEFFICIENT FOR PREOPERATIVE EVALUATION OF PITUITARY ADENOMA CONSISTENCY – John W Rutland, Joshua Loewenstern, Daniel Ranti, Nadejda Tsankova, Joshua B Bederson, Bradley N Delman, Priti Balchandani, Raj K Shrivastava; Icahn School of Medicine at Mount Sinai

003: POST-OPERATIVE PAIN MANAGEMENT AND PERCEIVED PATIENT OUTCOMES FOLLOWING ENDOSCOPIC PITUITARY SURGERY – Austin T Hoke, BS¹, Madison Malfitano, BS¹, Lucas Frickey, BS¹, Adam J Kimple, MD, PhD², Adam M Zanation, MD², Charles S Ebert, MD, MPH², Brent A Senior, MD², Brian D Thorp, MD²; ¹UNC School of Medicine, ²UNC Otolaryngology / Head and Neck Surgery

004: A HIGHLY SENSITIVE AND SPECIFIC ACTH-BASED PREDICTOR OF LONG-TERM REMISSION AFTER SURGERY FOR CUSHING’S DISEASE – Marcus A Zachariah, MD, PhD, Santino G Cua, BS, Bradley A Otto, MD, Ricardo L Carrau, MD, Luma Ghalib, MD, Russel R Lonser, MD, Daniel M Prevedello, MD; The Ohio State University

005: REPEAT SERUM SODIUM VALUES OVER 145 PREDICT DIABETES INSIPIDUS AFTER ENDOSCOPIC TRANSPHENOIDAL PITUITARY TUMOR RESECTION – Rebecca Breese, MD¹, Avinash Chandran, PhD², Sebastian Gil³, Weston Northam, MD², Elizabeth Harris, MD², Brian Thorp, MD², Adam Zanation, MD², Deanna Sasaki-Adams, MD², Matthew Ewend, MD², Carolyn Quinsey, MD²; ¹Wake Forest Baptist Health, ²University of North Carolina, ³University of North Carolina School of Medicine

006: READMISSION AFTER ENDOSCOPIC TRANSSPHENOIDAL PITUITARY SURGERY: ANALYSIS OF 584 CONSECUTIVE CASES – Iyan Younus, Georgiana Dobri, MD, Rohan Ramakrishna, MD, Theodore H Schwartz, MD; Weill Medical College/Cornell University

007: LONG TERM HYPOCORTISOLISM AFTER PITUITARY SURGERY: CAN POD1 STRESS RESPONSE PREDICT LONG-TERM OUTCOME? – Pascal Lavergne, MD, FRCSC, Prachi Patel, Chandala Chitguppi, MD, Tawfiq Khouri, MD, Mindy Rabinowitz, MD, Gurston G Nyquist, MD, Marc R Rosen, MD, Christopher J Farrell, MD, James J Evans, MD; Thomas Jefferson University

008: LONG-TERM OUTCOMES AFTER ENDOSCOPIC ENDONASAL SURGERY FOR NON-FUNCTIONING PITUITARY MACROADENOMAS – Iyan Younus¹, Mina Gerges, MD¹, Kavelin Rumalla, BA², Saniya Godil, MD¹,  Walid Elshamy¹, Viay K. Anand, MD¹, Theodore H. Schwartz¹, Georgiana Dobri¹; ¹Department of Neurosurgery, Weill Cornell Medicine, New York Presbyterian Hospital, New York NY, ²6Deparmtent of Biomedical and Health Informatics, University of Missouri-Kansas City School of Medicine, Kansas City, MO, USA

009: DURAL SEALANTS DO NOT REDUCE POSTOPERATIVE CEREBROSPINAL FLUID LEAKS AFTER ENDOSCOPIC ENDONASAL SKULL BASE SURGERY – Michael McDowell, Rachel Jacobs, BS, Benita Valappil, Eric Wang, MD, Carl Snyderman, MD, MBA, Paul A Gardner, MD; University of Pittsburgh Medical Center

010: TRANSORBITAL ENDOSCOPIC APPROACH FOR REPAIR OF FRONTAL SINUS CEREBROSPINAL FLUID LEAKS: A SINGLE-INSTITUTIONAL EXPERIENCE – Raywat Noiphithak, MD, Pree Nimmanitya, MD, Vich Yindeedej, MD, Pataravit Rukskul, MD; Division of Neurosurgery, Department of Surgery, Faculty of Medicine, Thammasat University

011: A NOVEL SCORING SYSTEM FOR COMPLEXITY AND OPERATIVE SUCCESS OF OSTEOCUTANEOUS FREE-FLAP RECONSTRUCTION OF THE MIDFACE AND ORBIT – Brian Swendseid, MD, Swar Vimawala, BS, Matthew Stewart, BS, Tony Richa, MD, Ryan Heffelfinger, MD, Howard Krein, MD, PhD, Adam Luginbuhl, MD, Richard Goldman, MD, Joseph Curry, MD; Thomas Jefferson University Hospitals

012: HETEROGENEITY IN OUTCOMES REPORTING IN ENDOSCOPIC ENDONASAL SKULL BASE RECONSTRUCTION: A SYSTEMATIC REVIEW. – Christina Dorismond, MPH¹, Griffin D Santarelli, MD², Brian D Thorp, MD¹, Adam J Kimple, MD, PhD¹, Charles S Ebert, MD¹, Adam M Zanation, MD¹; ¹University of North Carolina School of Medicine, ²Barrow Neurological Institute

013: SINONASAL QUALITY-OF-LIFE OUTCOMES AFTER ENDOSCOPIC ENDONASAL TRANSSPHENOIDAL SURGERY WITH FREE MUCOSAL GRAFT RECONSTRUCTION – Tara J Wu, MD¹, Angela Chen, BS¹, Marvin Bergsneider, MD², Jivianne T Lee¹, Jeffrey D Suh¹, Marilene B Wang¹; ¹UCLA Department of Head and Neck Surgery, ²UCLA Department of Neurosurgery

014: CORRELATION OF SKULL BASE CSF LEAK FLOW RATES WITH FLUID PATTERN ON EARLY, DELAYED AND SUBTRACTION VOLUMETRIC EXTENDED ECHO TRAIN T2 MRI – John W Rutland, Satish Govindaraj, Corey M Gill, Michael Shohet, Alfred Iloreta, Joshua B Bederson, Raj K Shrivastava, Bradley N Delman; Icahn School of Medicine at Mount Sinai

015: DECREASED RATE OF CSF LEAKS AFTER SKULL BASE FRACTURES IN THE 21ST CENTURY: A TWO-INSTITUTION EXPERIENCE – Brittany M Stopa, MPH¹, Oscar A Leyva¹, Cierra Harper¹, Kyla A Truman¹, Carleton E Corrales, MD², Timothy R Smith, MD, PhD, MPH¹, William B Gormley, MD, MPH, MBA¹; ¹Computational Neuroscience Outcomes Center at Harvard, Brigham and Women’s Hospital, Department of Neurosurgery, Boston, MA, USA, ²Brigham and Women’s Hospital, Division of Otolaryngology, Boston, MA, USA

016: THE RECONSTRUCTIVE PHASE IN THE EXTENDED ENDOSCOPIC ENDONASAL APPROACHES TO THE SKULL BASE AND THE ANTERIOR CRANIO-VERTEBRAL JUNCTION: FROM THE OPERATING ROOM TO THE E.N.T. OUTPATIENT CLINIC – L. G. M. Di Somma, M. Dobran, V. Liverotti, M. Capece, D. Aiudi, M. Iacoangeli; Department Of Neurosurgery, Marche Polytecnic University, Umberto I General Hospital, Ancona, Italy

017: MULTI-CENTER ANALYSIS OF CLINICAL OUTCOMES AND BIOMARKERS OF ESTHESIONEUROBLASTOMA – Matt Lechner, MD, PhD¹, Mario Hermsen, PhD², Mario Turri-Zanoni, MD³, Volker H Schartinger, MD⁴, Sam Helman, MD⁵, Jordan Varghese⁵, C. Arturo Solares, MD⁵, Kelly Magliocca, MD⁶, Simon Wang, MD⁷, Susanne Sprung, MD⁸, David Howard, FRCS⁹, Nils Engel, MD¹⁰, David Capper, MD¹¹, Ulrich Schueller, MD¹², Martin Forster, PhD¹³, Amrita Jay, MBBS¹⁴, Cillian Forde, MBBS¹³, Jozsef Dudas, PhD⁴, Herbert Riechelmann, MD⁴, R. Peter Manes, MD¹⁵, Wendell G Yarbrough, MD¹⁶, Jose L Llorente, MD², Sarah K Wise⁵, Paolo Castelnuovo, MD³, Valerie J Lund, CBE¹⁷; ¹UCL Cancer Institute, University College London, 72 Huntley Street, London, WC1E 6DD, United Kingdom, ²Instituto de Investigación Sanitaria del Principado de Asturias (ISPA), Instituto Universitario de Oncología del Principado de Asturias (IUOPA), Centro de Investigación Biomédica en Red (CIBER-ONC), Oviedo, Spain, ³Unit of Otorhinolaryngology – Head & Neck Surgery, University of Insubria, Varese, Italy, ⁴Department of Otorhinolaryngology-Head and Neck Surgery, Medical University of Innsbruck, Innsbruck, Austria, ⁵Department of Otorhinolaryngology-Head and Neck Surgery, Emory University, Atlanta, Georgia, US, ⁶Department of Pathology, Emory University, Atlanta, Georgia, US, ⁷Institute of Nuclear Medicine, University College Hospital, London, United Kingdom, ⁸Institute of Pathology, Medical University of Innsbruck, Innsbruck, Austria, ⁹Head and Neck Cancer Unit, Imperial College Healthcare NHS Trust, London, UK, ¹⁰Ludwig-Maximilians University, Munich, Germany, ¹¹Department of Neuropathology, Charite University, Berlin, Germany, ¹²University Medical Center Hamburg-Eppendorf, Hamburg, Germany, ¹³Head and Neck Centre, University College London Hospitals NHS Trust, London, United Kingdom., ¹⁴Department of Histopathology, University College London Hospitals NHS Trust, London, United Kingdom, ¹⁵Department of Surgery, Division of Otolaryngology, Yale School of Medicine, New Haven, Connecticut, US, ¹⁶Department of Otolaryngology/Head and Neck Surgery and Department of Pathology, University of North Carolina, Chapel Hill, NC, US, ¹⁷Royal National Throat, Nose and Ear Hospital and Head and Neck Centre, University College London Hospitals NHS Trust, London, United Kingdom

018: TREATMENT MODALITY ROLE IN SURVIVAL OF PATIENTS WITH ADVANCED SQUAMOUS CELL CARCINOMA OF THE SINONASAL CAVITY: A NATIONAL CANCER DATABASE STUDY – Chris Johnson, PharmD, MD, Camilo Reyes, MD; Augusta University

019: SURVIVAL OUTCOMES IN SINONASAL POORLY DIFFERENTIATED SQUAMOUS CELL CARCINOMA – Feras Y Ackall, MD¹, Ian Barak, MS², Khalil Issa, MD¹, Jordan Teitelbaum, DO¹, David W Jang, MD¹, Sin-Ho Jung, PhD², Ralph Abi Hachem, MD, MSc¹; ¹Duke University Medical Center, ²Duke University

020: MANAGEMENT OF SOFT TISSUE SARCOMAS OF THE SKULL BASE: FACTORS IMPACTING TUMOR CONTROL AND DISEASE-SPECIFIC SURVIVAL – Idara Edem, MD, MSc, Franco Demonte, MD, Ahmed Habib, MD, Shirley Su, MBBS, Ehab Hanna, MD, Paul Gidley, MD, Marc-elie Nader, MD, Michael Kupferman, MD, Jack Phan, MD, Shaan Raza, MD; The University of Texas M.D. Anderson Cancer Center

021: TREATMENT OF SINONASAL SQUAMOUS CELL CARCINOMA: THE EXPERIENCE AT A SINGLE TERTIARY CARE FACILITY OVER 32 YEARS. – Michael J Sylvester, Rachel Fenberg, Erin L McKean, MD, Kyle K VanKoevering, MD; University of Michigan

022: ANEURYSMAL BONE CYSTS OF THE PARANASAL SINUSES: THE MAYO CLINIC EXPERIENCE AND REVIEW OF THE LITERATURE – Alyssa J Smith, MD, Kathryn Van Abel, MD, Garret Choby, MD; Mayo Clinic

023: SINONASAL UNDIFFERENTIATED CARCINOMA: AN INSTITUTIONAL TREND TOWARDS INDUCTION CHEMOTHERAPY FOLLOWED BY DEFINITIVE CHEMORADIATION – Nyall London, MD, PhD¹, Ahmed Mohyeldin², Georges Daoud³, Dukagjin Blakaj³, Mauricio Gamez³, Ricardo Carrau³; ¹Johns Hopkins University, ²Stanford University, ³The Ohio State University

024: SINONASAL SQUAMOUS CELL CARCINOMA OUTCOMES: DOES TREATMENT AT A HIGH-VOLUME CENTER CONFER SURVIVAL BENEFIT? – Jordan I Teitelbaum, DO, Ian Barak, Khalil Issa, MD, Feras Ackall, MD, Sin-Ho Jung, PhD, David Jang, MD, Ralph Abi-Hachem, MD, MSc; Duke University Medical Center

025: 1000 CONSECUTIVE ENDONASAL ENDOSCOPIC SKULL BASE CASES: HOW LONG IS THE LEARNING CURVE? – Iyan Younus, BS, Rafael Uribe-Cardenas, MD, Peter Morgenstern, MD, Mahmoud ElJalby, MSSc, Ashutosh Kacker, MD, Vijay K Anand, MD, Theodore H Schwartz, MD; Weill Cornell Medicine

026: COMPLICATIONS FOLLOWING 1,002 ENDOSCOPIC ENDONASAL APPROACHES AT A SINGLE TERTIARY CENTER: LESSONS LEARNED 2010-2018 – Douglas A Hardesty, MD, Alaa Montaser, MD, Daniel Kreatsoulas, MD, Varun Shah, BA, Brad A Otto, Ricardo Carrau, MD, Daniel M Prevedello, MD; Ohio State University

027: DVT/PE RATES AND ETIOLOGIES AFTER ENDOSCOPIC/ENDOSCOPIC-ASSISTED SKULL BASE SURGERY – Kawinyarat Jitaroon, MD¹, Sun Hee Song, MD¹, Michael T Chang, MD¹, Yossawee Wongworawut, MD¹, Nour Ibrahim, MD¹, Juan C Fernandez-Miranda, MD¹, Zara M Patel, MD¹, Robert L Dodd, MD¹, Peter H Hwang, MD¹, Griffith R Harsh, MD², Jayakar V Nayak, MD¹; ¹Stanford University, ²University of California, Davis

028: IMPACT OF FRAILTY ON OUTCOMES FOLLOWING ENDOSCOPIC ENDONASAL SKULL BASE SURGERY: A PROSPECTIVE COHORT ANALYSIS OF 152 PATIENTS – Ezequiel Goldschmidt, Nitin Agarwal, Tavis Taylor, Stefanie Altieri, Andrew Bilderback, Carl H Snyderman, Paul Gardner, Daniel Hall; University of Pittsburgh

029: CLINICAL OUTCOMES AND COMPLICATIONS FOLLOWING INTERNAL NEUROLYSIS FOR THE TREATMENT OF TRIGEMINAL NEURALGIA: AN INSTITUTIONAL CASE SERIES – Jacob Mazza, BS, Victor Sabourin, MD, Pascal Lavergne, MD, Jeffery Head, BA, Tomas Garzon, MD, Donald Ye, MD, Anthony Stefanelli, MD, Fadi Al-Saiegh, MD, James J Evans, MD; Thomas Jefferson University

030: CLINICAL ANALYSIS OF 11 CASES OF PSEUDOANEURYSM HEMORRHAGE OF INTERNAL CAROTID ARTERY AFTER RADIOTHERAPY FOR NASOPHARYNGEAL CARCINOMA – Houyong Li, Dehui Wang, Huabin Li, Yurong Gu, Xicai Sun, Huapeng Yu, Quan Liu, Huankang Zhang; Department of Otolaryngology Eye, Ear, Nose and Throat Hospital Shanghai Medical College of Fudan University

031: POSTOPERATIVE NASAL DEBRIDEMENT IN THE OPERATING ROOM AFTER ENDOSCOPIC SKULL BASE SURGERY: WHEN IS IT INDICATED? – Adedamola Adepoju, MD¹, Kent Curran, BS², Maria Peris-Celda, MD, PhD¹, Tyler Kenning, MD¹, Carlos Pinheiro-Neto, MD, PhD³; ¹Department of Neurologic Surgery, Albany Medical Center, ²Albany Medical College, ³Division of Otolaryngology and Head and Neck Surgery, Department of Surgery, Albany Medical Center

032: THE EXPANDED ENDONASAL APPROACH: DOES GREATER EXPOSURE CHANGE RHINOLOGIC OUTCOMES? – John M Byrne IV, BA¹, Ari Stone, BA², Margaret Tallmadge, BS¹, Krista Brackman, BS¹, Bhavani Kura, MD², Juanita Celix, MD, MPH², Amin Kassam, MD, FRCSC², Sammy Khalili, MD, MSc, FRCSC²; ¹Aurora Research Institute, ²Aurora Neuroscience Innovation Institute

033: COMBINED ENDOSCOPIC-ENDONASAL SUPRAORBITAL KEYHOLE SURGERY FOR THE MANAGEMENT OF ANTERIOR SKULL BASE MENINGIOMAS: DIFFERENT VIEW OF THE SAME PATHOLOGY – V. Liverotti¹, G. Polonara², A. Donati³, P. Martorano⁴, F. Mancini¹, G. Bizzocchi¹, M. Iacoangeli¹; ¹Department of Neurosurgery, Marche Polytecnic University, Umberto I General Hospital, Ancona, Italy, ²Department of Radiology, Section of Neuroradiology, Marche Polytecnic University, Umberto I General Hospital, Ancona, Italy, ³Department of Anestesiology and Intensive Care, Umberto I General Hospital, Ancona, Italy, ⁴Department of Anestesiology, Section of Neuroanestesiology, Umberto I General Hospital, Ancona, Italy

034: DISTAL VASCULAR COMPRESSION (BEYOND THE OBERSTEINER REDLICH ZONE) DURING FULLY ENDOSCOPIC MICROVASCULAR DECOMPRESSION FOR TRIGEMINAL NEURALGIA – Rachel Blue, MD, John YK Lee, MD, MSCE; University of Pennsylvania

035: COMPARATIVE ANALYSIS OF ENDOSCOPIC TRANSORBITAL APPROACH AND EXTENDED MINI-PTERIONAL APPROACH FOR SPHENOID WING MENINGIOMAS WITH OSSEOUS INVOLVEMENT: PRELIMINARY SURGICAL RESULTS – Hun Ho Park, MD¹, Jihwan Yoo, MD¹, In-Sik Yun, MD, PhD², Chang-Ki Hong¹; ¹Department of Neurosurgery, Gangnam Severance Hospital, Yonsei University, ²Department of Plastic surgery, Gangnam Severance Hospital, Yonsei University

036: EXTENT OF SURGICAL RESECTION OF EPIDERMOID TUMORS AFFECTS RISK OF RECURRENCE: RESULTS OF THE LARGEST META-ANALYSIS OF 691 PATIENTS – Brian Shear, BS¹, Lan Jin, PhD², Yawei Zhang, MD, PhD², Wyatt David, MS¹, Elena Fomchenko, MD, PhD¹, E. Zeynep Erson-Omay, PhD¹, Anita Huttner, MD³, Robert K Fulbright, MD⁴, Jennifer Moliterno, MD¹; ¹Yale Department of Neurosurgery, ²Yale Department of Sugery, ³Yale Department of Pathology, ⁴Yale Department of Radiology

037: CHOROID PLEXUS PAPILLOMAS OF THE CEREBELLOPONTINE ANGLE AND FOURTH VENTRICLE: COHORT STUDY – Amanda Munoz Casabella, MD, Avital Perry, MD, Christopher S Graffeo, MD, Lucas P Carlstrom, MD, Michael J Link, MD; Mayo Clinic

038: ENDOSCOPIC ENDONASAL VERSUS TRANSCRANIAL APPROACH TO RESECTION OF OLFACTORY GROOVE MENINGIOMAS: A SYSTEMATIC REVIEW – Aarti Purohit, BS, Roshani Jha, Adham M Khalafallah, MD, Carrie Price, Nicholas R Rowan, MD, Debraj Mukherjee, MD, MPH; Johns Hopkins School of Medicine

039: HIGH VARIABILITY OF “OUTSIDE RADIOLOGIST REPORTS” IN TRIGEMINAL NEURALGIA PATIENTS UNDERGOING ENDOSCOPIC MICROVASCULAR DECOMPRESSION – Rachel Blue, MD, Denise Miller, CRNP, Carrie Li, John YK Lee, MD, MSCE; University Of Pennsylvania

040: SURGICAL TIPS AND PITFALLS OF ENDOSCOPIC SUPERIOR EYELID TRANSORBITAL SURGERY FOR ORBIT, MIDDLE FOSSA AND MECKEL’S CAVE LESIONS – Doosik Kong, MD, PhD, Minsoo Kim, MD; Samsung Medical Center, Sungkyunkwan University

041: THE ENDONASAL ENDOSCOPIC PERSPECTIVE OF PARACLINOID ANEURYSMS – A CADAVERIC ANATOMICAL ANALYSIS – Huy Q Truong, MD¹, Salomon Cohen-Cohen, MD², Nathan T Zwagerman, MD¹, Juan C Fernandez-Miranda, MD³, Paul A Gardner, MD⁴; ¹Medical College of Wisconsin, ²Mayo Clinic Rochester, ³Stanford University Medical Center, ⁴University of Pittsburgh Medical Center

042: ENDOSCOPIC ENDONASAL APPROACH FOR CRANIOPHARYNGIOMAS WITH INTRAVENTRICULAR EXTENSION: LONG-TERM OUTCOMES AND META-ANALYSIS – Hanna Algattas, MD, Pradeep Setty, DO, Ezequiel Goldschmidt, MD, PhD, Eric W Wang, MD, Elizabeth Tyler-Kabara, MD, PhD, Carl H Snyderman, MD, MBA, Paul A Gardner; UPMC

043: CLINICAL OUTCOMES OF ENDOSCOPIC ENDONASAL ODONTOID RESECTION: A SINGLE CENTER EXPERIENCE – Elysia Grose¹, Ioana Moldovan, MD, MSc², Shaun Kilty, MD, FRCSC³, Charles Agbi, MB, BS, FRCS, FRSCEd, SN, FRCSC⁴, Andre Lamothe, MD, FRCSC⁵, Fahad AlKherayf, MD, MSc, CIP, FRCSC⁴; ¹Faculty of Medicine, University of Ottawa, Ottawa, Ontario, Canada, ²Division of Neurosurgery, Department of Surgery, The Ottawa Hospital Research Institute, Ottawa, Canada, ³Department of Otolaryngology- Head & Neck Surgery, University of Ottawa, Ottawa, Canada, ⁴Division of Neurosurgery, Department of Surgery, University of Ottawa, Ottawa, Ontario, Canada, ⁵Department of Otolaryngology- Head & Neck Surgery, The Ottawa Hospital, Ottawa, Canada

044: AN UPDATE ON THE ENDOSCOPIC ENDONASAL APPROACH TO ORBITAL AND ORBITAL APEX LESIONS: A SERIES OF 97 PATIENTS – Joel Franco, MD¹, Nathan Zwagerman, MD², Carl Snyderman, MD¹, Paul Gardner, MD¹, Tonya Stefko, MD¹, Eric Wang, MD¹; ¹University of Pittsburgh Medical Center, ²Medical College of Wisconsin

045: ENDOSCOPIC TRANSORAL NASOPHARYNGECTOMY – Roberto M Soriano, MD, Rima S Rindler, MD, Samuel N Helman, MD, Gustavo Pradilla, MD, C. Arturo Solares, MD; Emory University (SSO)

047: IMPACT OF MEDICAID INSURANCE ON OUTCOMES FOLLOWING ENDOSCOPIC TRANSSPHENOIDAL PITUITARY SURGERY – Iyan Younus, BS, Rohan Ramakrishna, MD, Ashutosh Kacker, MD, Abtin Tabaee, MD, Vijay K Anand, MD, Theodore H Schwartz, MD; Weill Cornell Medicine

048: “EXTREME” INDICATION OF THE ENDOSCOPIC ENDONASAL APPROACH FOR COMPLEX C1-C2 FRACTURES. – M. Dobran, A. Marini, E. Carrassi, M. Capece, R. Paracino, M. Iacoangeli; Department of Neurosurgery, Marche Polytecnic University, Umberto I General Hospital, Ancona, Italy

049: DEVELOPMENT OF CLINICALLY APPLICABLE MOLECULAR MARKERS DISTINGUISHING SINONASAL UNDIFFERENTIATED CARCINOMA FROM SINONASAL SQUAMOUS CELL CARCINOMA – Yoko Takahashi, PhD, Frederico O Gleber-Netto, MSc, DDS, PhD, Diana Bell, MD, Dianna Roberts, PhD, Tong-Xin Xie, MD, PhD, Ahmed S Abdelmeguid, MD, PhD, Curtis Pickering, PhD, Jeffrey N Myers, MD, PhD, Ehab Y Hanna, MD; The University of Texas MD Anderson Cancer Center

050: SINONASAL MUCOSAL MELANOMA: A COMPARISON OF OUTCOMES BETWEEN SURGICAL RESECTION AND IMMUNE CHECKPOINT INHIBITION – Shivangi Lohia, MD, Stephanie Flukes, MD, Alexander N Shoushtari, MD, Akash D Shah, MD, Ian Ganly, MD, Snehal G Patel, MD, Jennifer R Cracchiolo, MD, Christopher Barker, MD, Jatin P Shah, MD, Viviane S Tabar, MD, Marc Cohen, MD; Memorial Sloan Kettering Cancer Center

051: SURGICAL MANAGEMENT OF SKULL BASE/INFRATEMPORAL FOSSA MALIGNANCIES: PREDICTORS OF POST-OPERATIVE PERFORMANCE – Patrick J Hunt, Moran Amit, MD, PhD, Mohamed Aashiq, Franco DeMonte, MD, Ehab Y Hanna, MD, Michael E Kupferman, MD, Shirley Y Su, MBBS, Paul W Gidley, MD, Marc-Elie Nader, MD, Shaan M Raza, MD; M.D. Anderson

052: IDENTIFICATION OF EPITHELIAL MEMBRANE PROTEIN 2 (EMP2) AS A MOLECULAR MARKER AND CORRELATE FOR ANGIOGENESIS IN MENINGIOMA – Kunal S Patel, Sameer Kejirwal, Samasuk Thammachantha, Courtney Duong, Ann Chan, Lynn Gordon, William Yong, Madhuri Wadehra, Isaac Yang; UCLA

053: IMPACT OF AGE ON THE TREATMENT AND SURVIVAL IN SINONASAL MALIGNANCIES – Chandala Chitguppi, MD¹, Tawfiq Khoury, MD¹, Pascal Lavergne, MD², Prachi Patel, BA¹, Kira Murphy, MD¹, Mindy Rabinowitz, MD¹, Gurston Nyquist, MD¹, James Evans, MD², Marc Rosen, MD¹; ¹Department of Otolaryngology and Head and Neck Surgery, Thomas Jefferson University Hospital, ²Department of Neurological Surgery, Thomas Jefferson University Hospital

054: POST TREATMENT SURVEILLANCE FOR RECURRENCE IN SINONASAL MALIGNANCIES – Gurston Nyquist, MD¹, Prachi N Patel, BA¹, Chandala Chitguppi, MD¹, Swar Vimawala, BS¹, Tawfiq Khoury, MD¹, Mindy Rabinowitz, MD¹, Pascal Lavergne, MD, FRCSC², James Evans, MD², Marc Rosen¹; ¹Thomas Jefferson University, Department of Otolaryngology – Head and Neck Surgery, ²Thomas Jefferson University, Department of Neurosurgery

056: THE INFLUENCE OF HOSPITAL VOLUME ON THE OUTCOMES OF NASOPHARYNGEAL, SINONASAL AND SKULL-BASE TUMORS; A SYSTEMATIC REVIEW OF THE LITERATURE. – Rahul K Sharma, BS¹, Stephanie Flukes, MD², Marc A Cohen, MD, MPH²; ¹Columbia University Vagelos College of Physicians & Surgeons, New York, NY, USA, ²Head and Neck Service, Department of Surgery, Memorial Sloan Kettering Cancer Center, New York, NY, USA

057: HYBRID ROBOTICS IN ENDOSCOPIC TRANSNASAL SKULL BASE SURGERY: REPORT OF AN INITIAL, SINGLE-CENTRE CLINICAL EXPERIENCE – Francesca Zappa¹, Alba Madoglio¹, Davide Mattavelli², Alberto Schreiber², Stefano Taboni², Marco M Fontanella¹, Piero Nicolai¹, Francesco Doglietto¹; ¹Neurosurgery, Department of Medical and Surgical Specialties, Radiological Sciences and Public Health, University of Brescia, Brescia, Italy, ²Othorinolaryngology, Department of Medical and Surgical Specialties, Radiological Sciences and Public Health, University of Brescia, Brescia, Italy

058: CONTRALATERAL TRANSMAXILLARY CORRIDOR TO THE CAVERNOUS SINUS: A USEFUL ADJUNCT TO THE ENDOSCOPIC ENDONASAL APPROACH TO THE PARASELLAR REGION – Yury Anania, MD¹, Sheng Han, MD, PhD¹, Zenonos Georgios, MD², Eric W Wang, MD³, Carl H Snyderman, MD, MBA³, Paul A Gardner, MD²; ¹Center for Cranial Base Surgery, University of Pittsburgh, ²Department of Neurosurgery, University of Pittsburgh Medical Center, ³Department of Otolaryngology, University of Pittsburgh Medical Center

059: 3-DIMENSIONAL EXOSCOPIC TEMPORAL BONE RESECTIONS FOR ADVANCED HEAD AND NECK CANCER – Mallory J Raymond, MD¹, Roberto M Soriano, MD¹, Ryan Belcher, MD², C. Arturo Solares, MD, FACS¹; ¹Emory University, ²Vanderbilt University

060: ENDOSCOPIC ENDONASAL SKULL BASE SURGERY USING INDOCYANINE GREEN AND RELATIONSHIP TO PREOPERATIVE RADIOLOGICAL IMAGING – Mostafa Shahein, MD^1,2, Thomas L Beaumont, MD, PhD³, Luciano M Prevedello⁴, Khaled Ismail, MD², Radwan Nouby², Marilly Palettas⁵, Ricardo L Carrau, MD⁶, Bradley A Otto, MD⁶, Daniel M Prevedello¹; ¹Department of Neurological Surgery, The Ohio State University, Wexner Medical Center, Columbus, Ohio, ²Department of Neurosurgery, Aswan University, Egypt, ³Department of Neurological Surgery, University of California, San Diego, ⁴Department of Radiology, The Ohio State University, Wexner Medical Center, Columbus, Ohio, ⁵Department of Biomedical Informatics – Center for Biostatistics, The Ohio State University, Wexner Medical Center Columbus, Ohio, ⁶Department of Otolaryngology–Head and Neck Surgery, The Ohio State University, Wexner Medical Center Columbus, Ohio

061: NEUROSURGICAL APPLICATIONS OF A NOVEL TOUGH ADHESIVE BIOMATERIAL – Kyle C Wu, MD¹, Benjamin R Freedman, PhD², David J Mooney, PhD², Wenya L Bi, MD, PhD¹; ¹Center for Skull Base and Pituitary Surgery, Brigham and Women’s Hospital, ²Harvard John A. Paulson School of Engineering and Applied Sciences

062: SINGLE INSTITUTIONAL EXPERIENCE WITH BIOABSORBABLE STEROID ELUTING STENT TREATMENT OF RECURRENT RATHKE’S CLEFT CYST – Matthew Z Sun, MD, Marvin Bergsneider, MD, Marilene B Wang, MD; UCLA

063: ENDOSCOPIC TRANSNASAL EUSTACHIAN TUBE CLOSURE USING THE V-LOC WOUND CLOSURE DEVICE – Andrew J Thomas, MD¹, Sachin Gupta, MD², Aclan Dogan, MD², Timothy L Smith, MD, MPH², Justin Cetas, MD, PhD², Jeremy N. Ciporen, MD², Mathew Geltzeiler, MD²; ¹Oregon Health & Science University; Ochsner Clinic Foundation, ²Oregon Health & Science University

064: ANATOMICAL ANALYSIS AND PROPOSED DESIGN OF AN ANGLED DRILL FOR ENDOSCOPIC ENDONASAL PETROSECTOMY – Huy Q Truong, MD¹, Hamid Borghei-Razavi, MD², Pinar Celtikci, MD³, Emrah Celtikci, MD³, David T Fernandes Cabral⁴, Aldo Eguiluz-Meléndez, MD⁴, Paul A Gardner, MD⁴, Juan C Fernandez-Miranda, MD⁵; ¹Medical College of Wisconsin, ²Cleveland Clinic Florida, ³Gazi University Faculty of Medicine, ⁴University of Pittsburgh Medical Center, ⁵Stanford University Medical Center

Zara M Patel

Charles S. Ebert

Charles S. Ebert

Griffin D Santarelli

Griffin D Santarelli

Patrick Michael Colley

Patrick Michael Colley

Anthony G. Del Signore

Anthony G. Del Signore

John Y.K. Lee

John Y.K. Lee

Darlene Lubbe

Darlene Lubbe

Devyani Lal

Devyani Lal

Jean Anderson Eloy

Jean Anderson Eloy

Nithin D. Adappa

Nithin D. Adappa

Melanie Hayden Gephart

Melanie Hayden Gephart

Robert Dodd

Robert Dodd

Stacey Gray

Stacey Gray

Nathan T Zwagerman

Nathan T Zwagerman

Adam J Kimple

Adam J Kimple

Alexander A. Farag

Alexander A. Farag

Theodore H. Schwartz

Theodore H. Schwartz

Brian David Thorp, Deanna Sasaki-Adams, Raj Sindwani, Pablo F. Recinos, Raj Sindwani, Maria Peris Celda, Eric W. Wang, Paul A. Gardner

Moises Arriaga, Brad Welling, Benedict J Panizza, John Golfinos, Ted McRackan, Marc Schwartz

Bradford Alan Woodworth, Seilesh Babu, Matthew Luke Carlson, Zoukaa Sargi, Garret W Choby

A. Samy Youssef, Vijay Agarwal, Alexandre Felippu, Gabriel Zada, Marc A. Tewfik

Tarek A Rayan, Gregory J Basura, Colin L. W. Driscoll, William Couldwell, Wenya Linda Bi

Leo Ditzel, Daniel F. Kelly, Michael Kohanski, Luma Ghalib, Jeremy N Ciporen

Peter Morone, Neal M Jackson, Marcos Tatagiba, Oliver F Adunka, Jennifer A Moliterno Gunel, Mustafa Baskaya

Shirley Y. Su, Gelareh Zadeh, Ian F. Dunn, Konstantina Stankovic, Diana Bell, Waleed Abuzeid

Daniel F. Kelly, Kibwei A McKinney, Nelson M Oyesiku, Jamie Joseph Van Gompel, Christopher H. Rassekh

Bob S. Carter, Jacques J. Morcos, Peter S Amenta, Bernard R. Bendok, Deanna Sasaki-Adams

Pete Batra, Zoukaa Sargi, Jeffrey M Blumberg, Kyle K VanKoevering, Vijay Agarwal, Stephen Y Kang

• Keynote Speaker
• Honored Guest Speakers

Ricardo Carrau, Ivo Janecka, Adam Mikial Zanation, Daniel M. Prevedello, Jeffrey M. Sorenson, John Golfinos, Hugh Curtin, Amin B Kassam

Carlos Pinheiro-Neto, Ivan El-Sayed, Clementino Arturo Solares, Alejandro Monroy-Sosa, Amin B Kassam

James K. Liu, Joseph Paul Roche, Matthew Luke Carlson, Chad A. Glenn, Deanna Sasaki-Adams

Benjamin Y Huang, Theodore H. Schwartz, Alfred Marc Calo Iloreta

Raewyn G Campbell, Marilene Beth Wang, Carolyn Quinsey, Stacey Gray, Yvonne Chan, Carl Snyderman, Stella Lee, Jennifer Strahle, Corinna Levine

NYU Team vs. Quaker Skull Base Possie

Gabriel Zada, Juan C. Fernandez-Miranda, Paul A. Gardner, Anil Nanda, John Golfinos, Alan Boulos

Theodore H. Schwartz, Peter Hwang, Jonathan Morris, Varun R. Kshettry, Alice Zhao-Maxfield

Michael Chicoine, Eugene Yu, John Y.K. Lee, Joshua Bederson, Anthony G. Del Signore, Joshua Palmer, Jeffrey T. Jacob, Claudia F.E. Kirsch

Erin L. McKean, Jose G. Gurrola, Douglas A Hardesty, Jacques J. Morcos, Kibwei A McKinney, Zara M Patel, Oswaldo A Henriquez, Stephen C Hernandez, Brian Lobo

Kaan Yagmurlu, Ossama Al-Mefty, Michael Lawton

Enrique Antonio Iturriaga, Sunil Manjila, Jayakar Nayak, Amin B Kassam

065: GLYCEROL RHIZOTOMY FOR THE MANAGEMENT OF TUMOR ASSOCIATED TRIGEMINAL NEURALGIA – Christina Jackson, MD, Jennifer Franke, BS, Michael Lim, MD; Johns Hopkins School of Medicine

066: ADJUVANT RADIOTHERAPY IN SKULL BASE-LOCATED GRADE II, ATYPICAL MENINGIOMA – David P Bray, MD¹, Bryan Buster, MD, MPH¹, Joseph W Quillin, MD¹, Robert H Press, MD², Bree R Eaton, MD², Jeffrey J Olson¹; ¹Department of Neurosurgery, Emory University Medical Center, ²Department of Radiation Oncology, Emory University Medical Center

067: IMAGING-BASED SCORE FOR PREDICTING HIGHER GRADE MENINGIOMAS – Yaroslav Gelfand, MD, Abigail Funari, BS, Michael Longo, BA, Samuel Ahmad, BA, Sadiq Rahman, BA, Vijay Agarwal, MD; Albert Einstein College of Medicine, Montefiore Medical Center

068: INHIBITION OF PDGFR MAY BE A VIABLE TREATMENT OPTION FOR MENINGIOMAS – Tadeusz Wroblewski¹, Philip D Tatman¹, Anthony Fringuello¹, William Foreman¹, Sameul Scherer¹, Denise Damek, MD¹, Kevin Lillehei, MD¹, Randy Jensen, MD, PhD², David Ormond, MD¹, Michael Graner, PhD¹; ¹University of Colorado, ²University of Utah

271: SURGICAL MANAGEMENT OF PETROCLIVAL MENINGIOMAS BASED ON A RADIOGRAPHIC CLASSIFICATION WITH UPDATED FOLLOW-UP – Zhen Wu, Da Li, Jun-Ting Zhang; Beijing Tiantan Hospital, Capital Medical University

069: THE IMPACT OF CLINICAL FRAILTY ON OVERALL SURVIVAL FOLLOWING SURGICAL RESECTION IN PATIENTS WITH HIGH GRADE MENINGIOMAS – Jianning Shao, BA¹, Pranay Soni, MD², Arbaz Momin, BA¹, Diana Lopez, BA¹, Konrad K Knusel, BS³, Patrick J Elsworth, BA³, Varun Kshettry, MD², Pablo F Recinos, MD⁴; ¹Cleveland Clinic Lerner College of Medicine at Case Western Reserve University, ²Department of Neurosurgery, Cleveland Clinic, ³Case Western Reserve University School of Medicine, ⁴Section Head–Skull Base Surgery, Department of Neurosurgery, Cleveland Clinic

070: CLINICAL FRAILTY IS AN IMPORTANT PREDICTOR OF FUNCTIONAL OUTCOME FOLLOWING SURGICAL RESECTION IN PATIENTS WITH HIGH GRADE MENINGIOMAS – Jianning Shao, BA¹, Arbaz Momin, BS¹, Pranay Soni, MD², Diana Lopez, BA¹, Konrad K Knusel, BA³, Patrick J Elsworth, BS³, Varun R Kshettry, MD², Pablo Recinos, MD⁴; ¹Cleveland Clinic Lerner College of Medicine at Case Western Reserve University, ²Department of Neurosurgery, Cleveland Clinic, ³Case Western Reserve University School of Medicine, ⁴Section Head–Skull Base Surgery, Department of Neurosurgery, Cleveland Clinic

071: EXTENT OF RESECTION AND SURVIVAL OUTCOMES IN WORLD HEALTH ORGANIZATION GRADE II AND III MENINGIOMAS – Pranay Soni, MD, Jianning Shao, BS, Arbaz Momin, BS, Diana Lopez, BS, Varun R Kshettry, MD, Pablo F Recinos, MD; Cleveland Clinic

072: DELAYED OTOLOGIC COMPLICATIONS FOLLOWING THE TRANSLABYRINTHINE APPROACH FOR ACOUSTIC NEUROMA RESECTION – John P Leonetti, MD, Michael Hutz, MD, Sam Marzo, MD, Matthew Kircher, MD, Dennis Moore, MD, Douglas Anderson, MD; Loyola

073: INCIDENCE OF IATROGENIC INNER EAR BREACHES FROM VESTIBULAR SCHWANNOMA SURGERY: A REVIEW OF 1153 HEARING PRESERVATION APPROACHES – Nir Ben-Shlomo¹, A Rahimi², AM Abunimer¹, JP Guenette, MD¹, A Juliano, MD³, J Jayender, PhD¹, CE Corrales, MD¹; ¹Brigham and Women’s Hospital, ²Harvard Medical School, ³Massachusetts Eye and Ear Infirmary

074: FACIAL NERVE FUNCTION AND RISK FACTORS IN RESECTION OF LARGE CYSTIC VESTIBULAR SCHWANNOMAS – Daniela Stastna, Richard Mannion, Patrick Axon, Neil Donnelly, James Tysome, Mahonar Bance, David Moffat, David Hardy, Robert Macfarlane; Addenbrooke’s Hospital, Cambridge University NHS Foundation Trust, Cambridge, UK

075: SURGERY VERSUS RADIOSURGERY FOR FACIAL NERVE SCHWANNOMA: SYSTEMATIC REVIEW AND META-ANALYSIS OF FACIAL NERVE FUNCTION – Juliana Rotter, MD, Victor M Lu, MBBS, PhD, Avital Perry, MD, Christopher S Graffeo, MD, MS, Matthew L Carlson, MD, Colin L Driscoll, MD, Michael J Link, MD; Mayo Clinic

076: SAFETY AND EFFICACY OF POSTOPERATIVE ANTICOAGULATION FOR DEEP VEIN THROMBOSIS PROPHYLAXIS IN VESTIBULAR SCHWANNOMA MICROSURGICAL RESECTION – Malika Bhargava, MD, Komal Naeem, MD, Randall W Porter, MD; Barrow Neurological Institute

077: EVIDENCE FOR A BIOLOGICAL SHIFT BEHIND THE INCREASING INCIDENCE OF SPORADIC VESTIBULAR SCHWANNOMA – John P Marinelli, MD¹, Matthew L Carlson, MD²; ¹Department of Otolaryngology-Head and Neck Surgery, San Antonio Military Medical Center, San Antonio, TX, ²Departments of Otolaryngology-Head and Neck Surgery and Neurologic Surgery, Mayo Clinic, Rochester, MN

078: LOCAL CONTROL AND RADIOGRAPHIC RESPONSE AS A FUNCTION OF ISODOSE ADJUSTMENT IN STEREOTACTIC RADIOSURGERY TREATMENT FOR SPORADIC VESTIBULAR SCHWANNOMA – Avital Perry, MD, Achiraya Teyateeti, MD, Christopher S Graffeo, MD, Paul D Brown, MD, Bruce E Pollock, MD, Michael J Link; Mayo Clinic

079: ANTI-COAGULATION FOR CEREBRAL VENOUS SINUS THROMBOSIS AFTER POSTERIOR FOSSA SCHWANNOMA SURGERY: WORTH THE RISK? – Christina Jackson, MD, Pavan Shah, BS, Laura Saleh, BS, Gary Gallia, MD, PhD, Chetan Bettegowda, MD, PhD, Jon Weingart, MD, Henry Brem, MD, Rafael Tamargo, MD, Michael Lim, MD; Johns Hopkins School of Medicine

080: COMPREHENSIVE APPROACH TO TREATMENT OF PEDIATRIC SKULL BASE LESIONS: A CASE SERIES – Craig Miller, MD, Alizabeth Weber, BA, Kate Carroll, MD, Neeraja Konuthula, MD, Abdullah Feroze, Jacob Ruzevick, MD, Manuel Ferreira, MD, Kris S Moe, MD, Randall A Bly, MD; University of Washington

081: RECONSTRUCTION OF PEDIATRIC SKULL BASE DEFECTS: A RETROSPECTIVE ANALYSIS EMPHASIZING THE VERY YOUNG – Nyall London, MD, PhD¹, Gustavo G Rangel², Amanda Onwuka³, Ricardo L Carrau², Daniel Prevedello², Jeffrey Leonard², Patrick Walz³; ¹Johns Hopkins University/NIDCD, ²The Ohio State University, ³Nationwide Children’s

082: EFFECTS OF PREOPERATIVE VASCULAR EMBOLIZATION ON JUVENILE NASOPHARYNGEAL ANGIOFIBROMA SURGICAL OUTCOMES: A STUDY OF THE KIDS’ INPATIENT DATABASE – Jonathan Choi, MD, Justin Yu, BS, Benjamin Lovin, MD, K. Kelly Gallagher, MD; Baylor College of Medicine

083: PEDIATRIC TRAUMA PATIENTS WITH TEMPORAL BONE FRACTURES ARE AT RISK FOR MULTIPLE CRANIAL CT SCANS – Joshua Ewy, BS, Martin Piazza, MD, Brian Thorp, MD, Michael Phillips, MD, Carolyn Quinsey, MD; UNC School of Medicine

084: SIMULATION OF PEDIATRIC ANTERIOR SKULL BASE ANATOMY USING A 3-D PRINTED MODEL – Nyall London, MD, PhD¹, Gustavo G Rangel², Kyle VanKoevering³, Ashley Zhang³, Allison Powell³, Daniel Prevedello², Ricardo L Carrau², Patrick Walz⁴; ¹Johns Hopkins University/NIDCD, ²The Ohio State University, ³University of Michigan, ⁴Nationwide Children’s

085: MULTI-INSTITUTIONAL EXPERIENCE WITH PEDIATRIC OLFACTORY NEUROBLASTOMA – Nadeem R Kolia, MD¹, Shirley Y Su, MBBS², Ehab Y Hanna, MD², Uma S Ramaswamy, MD³, Eric W Wang, MD¹, Paul A Gardner, MD¹, Carl H Snyderman, MD, MBA¹; ¹University of Pittsburgh Medical Center, ²The University of Texas MD Anderson Cancer Center, ³Texas Children’s Hospital

086: PEDIATRIC PITUITARY SURGERY: CLAIMS-BASED ANALYSIS OF PRACTICE PATTERNS AND CLINICAL OUTCOMES – Vijay A Patel, MD, Eric W Schaefer, MS, Brad E Zacharia, MD, MS, Neerav Goyal, MD, MPH, Chan Shen, PhD, Meghan N Wilson, MD; Penn State Health Milton S. Hershey Medical Center

087: APPLICATIONS OF THE ENDOSCOPIC ENDONASAL APPROACH IN EARLY CHILDHOOD – Michael M McDowell, Georgios Zenonos, MD, Eric Wang, MD, Carl Snyderman, MD, MBA, Elizabeth Tyler-Kabara, MD, PhD, Paul A Gardner, MD; UPMC

088: RISK OF INTERNAL CAROTID ARTERY STENOSIS OR OCCLUSION AFTER SINGLE-FRACTION RADIOSURGERY OF BENIGN PARASELLAR TUMORS – Christopher S Graffeo, MD, Michael J Link, MD, Scott L Stafford, MD, Ian F Parney, MD, PhD, Robert L Foote, MD, Bruce E Pollock, MD; Mayo Clinic

089: BIOLOGICAL EFFECTIVE DOSE AS A PREDICTOR OF HYPOPITUITARISM AFTER SINGLE-FRACTION PITUITARY ADENOMA RADIOSURGERY: DOSIMETRIC ANALYSIS COHORT STUDY OF PATIENTS TREATED USING CONTEMPORARY TECHNIQUES – Christopher S Graffeo, MD, Avital Perry, MD, Michael J Link, MD, Paul D Brown, MD, William F Young, MD, Bruce E Pollock, MD; Mayo Clinic

090: COMPLICATIONS AFTER PROTON BEAM THERAPY TO SKULL BASE TUMORS – FINAL RESULTS OF A CASE SERIES – Gustavo G Rangal¹, Thiago A Felicio², Mostafa Shahein², Mauricio Gamez², Dukagjin Blakaj², Daniel Prevedello², Ricardo Carrau²; ¹Nationwide Children’s Hospital – OSU, ²Ohio State University

091: A PHASE I/II CLINICAL TRIAL OF PROTON THERAPY FOR CHORDOMAS AND CHONDROSARCOMAS – Alexandra D Dreyfuss, BSE¹, Michael J LaRiviere, MD¹, Jahan J Mohiuddin, MD¹, Brian C Baumann, MD², David M Miller, BA¹, Susan Mazzoni, MS¹, Robert A Lustig, MD¹, Jay F Dorsey, MD, PhD¹, Alexander Lin, MD¹, Sean M Grady, MD³, Bert W O’Malley, MD⁴, John Y Lee, MD³, Jason G Newman, MD⁴, James M Schuster, MD³, Michelle Alonso-Basanta, MD, PhD¹; ¹Department of Radiation Oncology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, ²Department of Radiation Oncology, Washington University School of Medicine, St. Louis, MO 63110, ³Department of Neurosurgery, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, ⁴Department of Otorhinolaryngology – Head and Neck Surgery, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104

092: OUTCOMES WITH IMRT VERSUS SRS SALVAGE RADIOTHERAPY FOR RECURRENT HIGH GRADE MENINGIOMA – Arbaz Momin, BS¹, Pranay Soni, MD², Jianning Shao, BA¹, Diana Lopez, BS¹, Patrick Elsworth, BS³, Konrad Knusel, BA³, Pablo F Recinos, MD⁴, Varun R Kshettry, MD⁴; ¹Lerner College of Medicine, Cleveland Clinic, Cleveland, OH, USA, ²Department of Neurosurgery, Cleveland Clinic, Cleveland, OH, USA, ³Case Western Reserve School of Medicine, Cleveland, OH, USA, ⁴Rose Ella Burkhardt Brain Tumor & Neuro-Oncology Center, Cleveland Clinic, Cleveland, OH, USA

093: A MULTIDISCIPLINARY CENTRAL NERVOUS SYSTEM CLINIC MODEL FOR RADIATION ONCOLOGY AND NEUROSURGERY (RADIANS): THREE-YEAR EXPERIENCE WITH BRAIN AND SKULL BASE LESIONS IN A COMMUNITY HOSPITAL SETTING – Wencesley Paez, MD¹, Rohi Gheewala, BS², Shearwood McClelland, III, MD³, Jerry J Jaboin, MD, PhD¹, Charles R Thomas, Jr., MD¹, Timur Mitin, MD, PhD¹, Jeremy N Ciporen, MD²; ¹Department of Radiation Medicine, Oregon Health and Science University, ²Department of Neurosurgery, Oregon Health and Science University, ³Department of Radiation Oncology, Indiana University School of Medicine

095: FUNDAL FLUID CAP IS ASSOCIATED WITH SHORT TERM HEARING PRESERVATION IN THE RADIOSURGICAL TREATMENT OF VESTIBULAR SCHWANNOMA – Dennis Bojrab II; Michigan Ear Institute

096: BIOMETRIC ANALYSIS OF SIMULATION OF SYLVIAN FISSURE DISSECTION AND CEREBROVASCULAR BYPASS UNDER SUBARACHNOID HEMORRHAGE CONDITIONS – Avital Perry, MD, Christopher Graffeo, MD, Lucas P Carlstrom, MD, William J Anding, Kenton Kaufman, PhD, Michael J Link, MD; Mayo Clinic

097: NETWORK ANALYSIS OF NASBS MEMBERSHIP – John Luebs¹, Carl Snyderman²; ¹SUNY Downstate Health Sciences University, ²University of Pittsburgh

098: ENDOSCOPIC SKULL BASE AND ADVANCED RHINOLOGY TRAINING IN NEURO-RHINOLOGY FELLOWSHIPS: STANDARDIZATION AND CASE CLASSIFICATION OF OPERATIVE VOLUME – Satyan B Sreenath, MD, Mark Gelpi, MD, Brian D Thorp, MD, Adam J Kimple, MD, Adam M Zanation, MD; University of North Carolina

099: NETWORK ANALYSIS OF PAST NASBS PRESIDENTS – John Luebs¹, Carl Snyderman²; ¹SUNY Downstate Health Sciences University, ²University of Pittsburgh

100: INTRAOPERATIVE PROTOCOL FOR THE MANAGEMENT OF CAROTID ARTERY INJURY DURING ENDOSCOPIC ENDONASAL SURGERY – Zachary Kassir¹, Carl H Snyderman, MD, MBA², Paul A Gardner, MD², Eric W Wang, MD², Georgios A Zenonos, MD²; ¹University of Pittsburgh School of Medicine, ²UPMC Center for Cranial Base Surgery

102: A MODEL IS WORTH 1,000 PICTURES: APPLICATIONS OF 3D-MODELING IN SKULL BASE SURGERY NEUROANATOMY EDUCATION – Christopher S Graffeo, MD, MS, Avital Perry, MD, Lucas P Carlstrom, MD, PhD, Michael J Link, MD, Jonathan Morris, MD; Mayo Clinic

103: 3D TRACTOGRAPHY IN SKULL BASE SURGERY: TECHNOLOGICAL ADVANCES AND FEASIBILITY-INITIAL EXPERIENCE. – Srikant S Chakravarthi, MD, MSc, Melanie B Fukui, MD, Alejandro Monroy-Sosa, MD, Jonathan E Jennings, MD, Austin Epping, BSc, Sammy Khalili, MD, Lior Gonen, MD, Juanita M Celix, MD, Bhavani Kura, MD, Nathaniel Kojis, MBA, Richard A Rovin, MD, Amin B Kassam, MD; Aurora Neuroscience Innovation Institute

Pablo Ajler, Diego Mendez Rosito, Francisco Guzman, Juan Gomez-Amador

104: WHO GRADE III MENINGIOMAS: DE NOVO TUMORS SHOW IMPROVED PROGRESSION FREE SURVIVAL COMPARED TO SECONDARY PROGRESSIVE TUMORS – Jacob Ruzevick, MD, Sam Emerson, MD, PhD, Kate Carroll, MD, Manuel Ferreira Jr., MD, PhD; University of Washington

105: ROMIDEPSIN IS A POSSIBLE TREATMENT FOR MENINGIOMAS THROUGH DUAL INHIBITION OF CLASS 1 AND 2 HDACS. – Philip D Tatman¹, Anthony Fringuello¹, William Foreman¹, Samuel Scherer¹, Tadeusz Wroblewski¹, Randy Jensen, MD, PhD², Denise Damek, MD¹, Kevin Lillehei, MD¹, David Ormond, MD¹, Michael Graner, PhD¹; ¹University of Colorado, ²University of Utah

106: THE SIMPSON GRADING SCALE CONTINUES TO HOLD STRONG PROGNOSTIC VALUE IN MODERN MENINGIOMA SURGERY: 10-YEAR SINGLE INSTITUTION EXPERIENCE – Colin J Przybylowski, MD, Benjamin Hendricks, MD, Xiaochun Zhao, MD, Claudio Cavallo, MD, Leandro Borba Moreira, MD, Sirin Gandhi, MD, Nader Sanai, MD, Kaith K Almefty, MD, Andrew S Little, MD; Barrow Neurological Institute

107: INCIDENCE OF SURGERY AFTER GAMMA KNIFE RADIOSURGERY FOR PARASAGITTAL MENINGIOMAS IS HIGHER THAN MENINGIOMAS IN OTHER LOCATIONS: A 10-YEAR REVIEW. – Andrew J Montoure, MD, Jennifer Connelly, MD, Joseph Bovi, MD, Nathan Zwagerman, MD; Medical college of Wisconsin

108: BRACHYTHERAPY WITH SURGICAL RESECTION AS SALVAGE TREATMENT FOR RECURRENT HIGH-GRADE MENINGIOMAS: A MATCHED COHORT STUDY – Michael A Mooney, MD¹, Wenya L Bi, MD, PhD², Jonathan Cantalino, MD², Kyle Wu, MD², Thomas Harris, PhD², Lucas Possatti², Parikshit Juvekar², Liangge Hsu, MD², Ian F Dunn, MD², Ossama Al-Mefty, MD², Phillip M Devlin, MD²; ¹Barrow Neurological Institute, ²Brigham and Women’s Hospital

109: THE IMPACT OF PATIENT FRAILTY ON HOSPITAL STAY AND DISCHARGE DISPOSITION FOLLOWING SURGICAL RESECTION IN PATIENTS WITH HIGH GRADE MENINGIOMAS – Jianning Shao, BA¹, Arbaz Momin, BS¹, Pranay Soni, MD², Diana Lopez, BA¹, Konrad K Knusel, BA³, Patrick J Elsworth, BS³, Varun R Kshettry, MD², Pablo F Recinos, MD⁴; ¹Cleveland Clinic Lerner College of Medicine at Case Western Reserve University, ²Department of Neurosurgery, Cleveland Clinic, ³Case Western Reserve University School of Medicine, ⁴Section Head–Skull Base Surgery, Department of Neurosurgery, Cleveland Clinic

110: ADJUVANT RADIATION DOES NOT DECREASE THE RISK OF SHORT-TERM TUMOR RECURRENCE IN PATIENTS WITH ATYPICAL MENINGIOMA – Jacob Ruzevick, MD, Timothy Woodiwiss, MD, Sam Emerson, MD, PhD, Kate Carroll, MD, Jason Rockhill, MD, PhD, Patrick Cimino, MD, PhD, Luis Gonzalez-Cuyar, Laligam Sekhar, MD, Manuel Ferreira Jr., MD, PhD; University of Washington

111: PRE-OPERATIVE CRANIAL NERVE DEFICITS AS CRUCIAL OUTCOME PREDICTOR FOR SKULL BASE MENINGIOMAS – Sebastian Liao¹, Shao-Ching Chen², Sanford Hsu²; ¹Taichung Veterans General Hospital, ²Taipei Veterans General Hospital

112: THE SOUND OF HAPPINESS: HEARING-RELATED QUALITY-OF-LIFE AND PATIENT SATISFACTION WITH MANAGEMENT DECISION-MAKING IN VESTIBULAR SCHWANNOMA – Lucas P Carlstrom, MD, PhD¹, Maria Peris Celda, MD, PhD², Avital Perry, MD¹, Christopher S Graffeo, MD¹, Geffen Kleinstern, PhD¹, Matthew L Carlson, MD¹, Michael J Link, MD¹; ¹Mayo Clinic, ²Albany Med

113: INTERNAL AUDITORY CANAL VARIABILITY AND FACIAL NERVE OUTCOME AFTER TRANSLABYRINTHINE RESECTION OF VESTIBULAR SCHWANNOMAS – Michael A Cohen, MD, Forrest Hammrick, BS, Austin S Gamblin, BS, Michael Karsy, MD, PhD, Richard Gurgel, MD, Clough Shelton, MD, William T Couldwell, MD, PhD; University of Utah

114: COCHLEAR FIESTA SIGNAL INTENSITY PREDICTS HEARING OUTCOMES AFTER MIDDLE FOSSA RESECTION OF ACOUSTIC NEUROMA – Kareem O Tawfik, MD, Marin McDonald, MD, Yin Ren, MD, PhD, Omid Moshtaghi, MD, Marc S Schwartz, MD, Rick A Friedman, MD, PhD; University of California San Diego

115: EVOLUTION IN MANAGEMENT TRENDS OF SPORADIC VESTIBULAR SCHWANNOMA FROM 1970 THROUGH 2019 USING THE ACOUSTIC NEUROMA ASSOCIATION PATIENT REGISTRY – Stephen A Chan, MD¹, John P Marinelli, MD¹, Debbie L Hahs-Vaughn, PhD², Michael J Link, MD³, Allison Feldman, MPA⁴, Chad Nye, PhD⁴, Matthew L Carlson, MD³; ¹Department of Otolaryngology-Head and Neck Surgery, Mayo Clinic, MN, ²Department of Learning Sciences and Educational Research, University of Central Florida, Orlando, FL, ³Departments of Neurologic Surgery and Otolaryngology-Head and Neck Surgery, Mayo Clinic, Rochester, MN, ⁴Acoustic Neuroma Association, Cumming, GA

116: SET YOUR PHASERS TO KILL: OUTCOMES AFTER HIGH-ROSE STEREOTACTIC RADIOSURGERY FOR VESTIBULAR SCHWANNOMA – Lucas P Carlstrom, MD, PhD, Avital Perry, MD, Christopher S Graffeo, MD, Bruce E Pollock, MD, Michael J Link, MD; Mayo Clinic

117: CEREBROSPINAL FLUID LEAK FOLLOWING VESTIBULAR SCHWANNOMA SURGERY – FACTORS THAT IMPACT OUTCOMES – Anne M Selleck, MD, Sarah Hodge, Kevin Brown; UNC

119: BLOOD-LABYRINTHINE BARRIER PERMEABILITY ASSESSED USING POST-CONTRAST DELAYED 3D-FLAIR MRI IMAGING IN VESTIBULAR SCHWANNOMA – Andrew J Bowen, MD, MS, Michael L Carlson, MD, John I Lane, MD; Mayo Clinic Department of Otorhinolaryngology

120: EMOTIONAL LABILITY AS A SYMPTOM OF EXTRA-AXIAL POSTERIOR FOSSA TUMOURS: A CASE-CONTROL REVIEW OF NEUROANATOMY AND PATIENT-REPORTED QUALITY OF LIFE – Swetha Prakash, Ryojo Akagami, MD, BSc, MHSc, FRCSC; University of British Columbia

121: VALIDATION OF THE SKULL BASE INVENTORY QUALITY OF LIFE QUESTIONNAIRE IN A MULTI-INSTITUTIONAL PROSPECTIVE COHORT STUDY OF PATIENTS UNDERGOING OPEN AND ENDOSCOPIC SKULL BASE SURGERY – David Forner, MD¹, Katrina Hueniken, MPH¹, Tom Yoannidis¹, Ian Witterick, MD, MSc, FRCSC¹, Eric Monteiro, MD, MSc, FRCSC², Allan Vescan, MD, MSc, FRCSC¹, Gelareh Zadeh, MD, PhD, FRCSC³, Patrick Gullane, MB, FRCSC, FACS, FRACS¹, Carl Snyderman, MD, MBA⁴, Eric Wang, MD⁴, Paul Gardner, MD⁴, Benita Valappil, MPH⁵, Dan Fliss, MD⁶, Barak Ringel, MD⁶, Ziv Gil, MD, PhD⁷, Shorook Na’ara, MD⁷, Nidal Muhanna, MD, PhD⁶, Eng Ooi, MBBS, PhD, FRACS⁸, David Goldstein, MD, MSc, FRCSC¹, Fred Gentili, MD¹, John de Almeida, MD, MSc, FRCSC¹; ¹Otolaryngology — Head & Neck Surgery, University Health Network, ²Otolaryngology — Head & Neck Surgery, Sinai Health System, ³Neurosurgery, University Health Network, ⁴Neurosurgery, University of Pittsburgh Medical Center, ⁵University of Pittsburgh Medical Center, ⁶Otolaryngology — Head & Neck Surgery, Tel-Aviv Sourasky Medical Center, ⁷Otolaryngology — Head & Neck Surgery, Rambam Medical Center, ⁸Otolaryngology — Head & Neck Surgery, Flinders Medical Centre

122: ASSESSMENT OF PSYCHOLOGICAL WELL-BEING IN NASOPHARYNGEAL CARCINOMA SURVIVORS. – Kira A Murphy, MD¹, Chandala Chitguppi, MD¹, Alexander Graf, BS², Tawfiq Khoury, MD¹, James J Evans, MD³, Marc R Rosen, MD¹, Gurston G Nyquist, MD¹, Mindy Rabinowitz, MD¹; ¹Department of Otolaryngology – Head and Neck Surgery, Thomas Jefferson University Hospital, ²Thomas Jefferson University, ³Thomas Jefferson University Hospital

123: SINONASAL OUTCOMES AFTER PITUITARY SURGERY IN PATIENT’S WITH CUSHING’S DISEASE – Nadeem R Kolia, MD, Paul A Gardner, MD, Carl H Snyderman, MD, MBA, Eric W Wang, MD; University of Pittsburgh Medical Center

124: QUALITY FROM THE PATIENT’S PERSPECTIVE: IMPLEMENTATION OF AN ESTABLISHED PATIENT REPORTED OUTCOME PLATFORM IN A MULTIDISCIPLINARY SKULL BASE TUMOR CLINIC – Stephanie Flukes, MD¹, Jennifer Cracchiolo, MD¹, Eliza Geer, MD¹, David Goldstein, MD², John De Almeida, MD², Vivian Tabar, MD¹, Marc A Cohen, MD¹; ¹Multidisciplinary Pituitary and Skull Base Program, Memorial Sloan Kettering Cancer Center, ²Department of Otolaryngology Head & Neck Surgery, Princess Margaret Cancer Centre

125: COMPARING SINONASAL OUTCOMES BETWEEN FUNCTIONAL AND NON-FUNCTIONAL PITUITARY LESIONS AFTER ENDOSCOPIC SELLAR AND PARASELLAR SURGERY – Yossawee Wangworawut, MD, Kawinyarat Jitaroon, MD, Peter H Hwang, Jayakar Y Nayak, MD, PhD, Juan Fernandez-Miranda, Robert Dodd, MD, PhD, Zara M Patel, MD; Stanford University

126: INTERNAL NEUROLYSIS FOR THE TREATMENT OF TRIGEMINAL NEURALGIA: SYSTEMATIC REVIEW – Victor Sabourin, Jacob Mazza, Jeffery Head, Pascal Lavergne, Tomas Garzon, Anthony Stefanelli, Fadi Al-Saiegh, James Evans; Thomas Jefferson University Hospital

127: ERGONOMICS IN ENDOSCOPIC TRANS-SPHENOIDAL SURGERY: A SURVEY OF THE NORTH AMERICAN SKULL BASE SOCIETY – Pier Paolo Mattogno, MD¹, Davide Mattavelli, MD², Filippo Marciano, PhD³, Michael P Catalino⁴, Alberto Schreiber², Paola Cocca, PhD³, Piero Nicolai², Edward R Laws, Jr.⁴, Ian Witterick⁵, Shaan M Raza⁶, Anand K Devaiah⁷, Liverana Lauretti¹, Alessandro Olivi¹, Marco M Fontanella⁸, Fred Gentili⁹, Francesco Doglietto⁸; ¹Neurosurgery, Agostino Gemelli Foundation, Rome, Italy, ²Otorhinolaryngology, Department of Medical and Surgical Specialties, Radiological Sciences and Public Health, University of Brescia, Brescia, Italy, ³Department of Mechanical and Industrial Engineering, University of Brescia, Brescia, Italy, ⁴Pituitary and Neuroendocrine Center, Department of Neurosurgery, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts, USA, ⁵Department of Otolaryngology-Head and Neck Surgery, University of Toronto, Toronto, Ontario, Canada, ⁶Department of Neurosurgery, The University of Texas MD Anderson Cancer Center, Houston, Texas, ⁷Department of Otolaryngology-Head and Neck Surgery, Boston University School of Medicine, Boston Medical Center, Boston, Massachusetts, United States, ⁸Neurosurgery, Department of Medical and Surgical Specialties, Radiological Sciences and Public Health, University of Brescia, Brescia, Italy, ⁹Department of Neurosurgery, Toronto Western Hospital, University of Toronto, Toronto, Ontario, Canada

128: STENTING FOR PREVENTION OF CAROTID BLOWOUT SYNDROME IN HIGH RISK HEAD AND NECK CANCER PATIENTS. – Bradley Kolb, MD¹, Andre Beer-Furlan, MD, PhD¹, Bledi Brahimaj, MD¹, Hormuzdiyar Dasenbrock, MD¹, Samer Al-Khudari¹, Demetrius Lopes, MD², Michael Chen, MD¹, R. Webster Crowley, MD¹; ¹Rush University Medical Center, ²Advocate Aurora Health

129: SURGICAL OUTCOMES WITH MIDLINE VS. LATERAL APPROACHES FOR SKULL BASE CHORDOMAS: A SYSTEMATIC REVIEW AND META-ANALYSIS – Devi P Patra, MD, Ryan Hess, BSE, Evelyn Turcotte, Matthew Welz, MS, Rudy Rahme, MD, Tanmoy Maiti, MD, Karl Abi-Aad, MD, Ahmed AlMekkawi, MD, Sameer Keole, MD, Devyani Lal, MD, Michael Marino, MD, Maciej Mrugala, MD, Alyx Porter, MD, Sujoy Vora, MD, Bernard R Bendok, MD; Mayo Clinic, Phoenix, Arizona

130: COMPUTED TOMOGRAPHY FINDINGS OF BONY ANTERIOR CRANIAL BASE EROSION AS A PREDICTOR OF PATHOLOGIC CRANIAL BASE INVASION IN SINONASAL MALIGNANCIES – Tawfiq Khoury, MD, Aarti Agarwal, MD, Pascal Lavergne, MD, Chandala Chitguppi, MD, James J Evans, MD, Mindy Rabinowitz, MD, Gurston Nyquist, MD, Marc Rosen, MD; Thomas Jefferson University

131: SINONASAL MALIGNANT MELANOMA AND THE ORBIT – Justin N Karlin, MD, MS¹, Mark Jameson, MD, PhD², Steven A Newman, MD²; ¹UCLA, ²UVA

132: SURVIVAL AND PATTERNS OF RELAPSE OF HEAD AND NECK MALIGNANCIES WITH LARGE NERVE PERINEURAL SPREAD (PNS) AFTER SKULL BASE SURGERY AND POSTOPERATIVE RADIATION THERAPY – Ryan Sommerville, DR, Charles Lin, DR, Papacostas Jason, DR; Royal Brisbane and Women’s Hospital

133: HIGH-THROUGHPUT SCREENING OF EPIGENETIC INHIBITORS IN CHORDOMA AND CHONDROSARCOMA – William Foreman¹, Philip D Tatman¹, Anthony Fringuello¹, Tadeusz Wroblewski¹, Samuel Scherer¹, Randy Jensen, MD, PhD², Kevin Lillehei, MD¹, Denise Damek, MD¹, Michael Graner, PhD¹, David Ormond, MD¹; ¹University of Colorado, ²University of Utah

134: CLINICOPATHOLOGIC ASSOCIATIONS OF PARTIAL-EMT IN SINONASAL SQUAMOUS CELL CARCINOMA – Anuraag S Parikh, MD¹, Shekhar K Gadkaree, MD¹, Eric Barbarite, MD¹, Stacey T Gray, MD¹, William C Faquin, MD, PhD¹, Sidharth V Puram, MD, PhD², Derrick T Lin, MD¹; ¹Massachusetts Eye and Ear, ²Washington University Department of Otolaryngology

135: EN BLOC MODIFIED SUBTOTAL TEMPORAL BONE RESECTION FOR ADVANCED SQUAMOUS CELL CARCINOMA OF THE TEMPORAL BONE – Noritaka Komune¹, Satoshi Matsuo², Takashi Nakagawa¹; ¹Kyushu University Hospital, ²Clinical Research Institute, National Hospital Organization, Kyushu Medical Center

S Tonya Stefko

Raymond I Cho

Mindy Robyn Rabinowitz

Steven Newman

Tanya Rath

Ted Wladis

James Garrity

Raymond I Cho, Ben Bleier, Carl Snyderman, & Andrei Koerbel

Howard Krauss

Dan Rootman

Alessandro Paluzzi

Davide Locatelli

Jeffrey M. Sorenson

Darlene Lubbe

Dukagjin M Blakaj

Somasundaram Subramaniam

Mike Kazim

Sang H Hong

Andrei Koerbel

Michelle Latting

Eric W. Wang, Ben Bleier, Kris Moe, & Dan Rootman

Jeffrey M. Sorenson, Oliver F Adunka, Ken Matsushima, L Madison Michael

Gelareh Zadeh, Raewyn G Campbell, Amin B Kassam, Ivan El-Sayed, Isaac Yang, Amin B Kassam

Apio Antunes, Luma Ghalib, John Anthony Jane, Stella Lee, Albert Kim, Julie Silverstein

Matthew Luke Carlson, Jacob B Hunter, Joshua Palmer, Mustafa Baskaya, Cameron Wick, Leslie Kim

136: TAILORING THE SURGICAL CORRIDOR TO THE BASILAR APEX IN THE PRETEMPORAL TRANSCAVERNOUS APPROACH: MORPHOMETRIC ANALYSIS OF DIFFERENT NEUROVASCULAR MOBILIZATION MANEUVERS – Mohamed Labib, X Zhao, DR, Komal Naeem, M Preul, M Lawton; Barrow Neurological Institute

137: ENDOSCOPIC SINUS APPROACHES VS. TRANSCRANIAL ANTERIOR PETROSECTOMY: A VOLUMETRIC COMPARATIVE STUDY OF ACCESS TO THE PETROUS BONE AND THE PETROUS APEX – Vanessa Hernandez-Hernandez, MD, Aldo Eguiluz-Melendez, Belen Vega, Eric W. Wang, Carl H. Snyderman, MD, MBA, Paul A. Gardner; University of Pittsburgh Medical Center

139: THE UPPER PETROCLIVAL REGION AS SEEN THROUGH DIFFERENT SURGICAL WINDOWS: AN EXTENSIVE ANATOMOSURGICAL STUDY – Michael G Kim, Filippo Veneziani Santonio, Lara Mastino, Lukasz Przepiórka, Philip E Stieg, Alexander I Evins, Antonio Bernardo; Weill Cornell Medicine, Neurological Surgery

140: FOUNDATIONS OF ADVANCED NEUROANATOMY: TECHNICAL GUIDELINES FOR SPECIMEN PREPARATION, DISSECTION, AND 3D-PHOTODOCUMENTATION IN A SURGICAL ANATOMY LABORATORY – Luciano César PC Leonel, PhD¹, Lucas P Carlstrom, MD, PhD², Christopher S Graffeo, MD, PhD², Avital Perry, MD², Carlos Diogenes Pinheiro-Neto, MD, PhD¹, Jeffrey Sorenson, MD³, Michael J Link, MD², Maria Peris-Celda, MD, PhD¹; ¹Northeast Professor Rhoton Skull Base Dissection Laboratory, Department of Neuroscience and Experimental Therapeutics, Albany Medical Center, Albany, NY, ²Department of Neurologic Surgery, Mayo Clinic, Rochester, MN, ³Department of Neurological Surgery, University of Tennessee and Semmes-Murphy Clinic, Memphis, TN

141: ENDOSCOPIC TRANSORAL EVALUATION OF HYPOGLOSSAL NERVE AND ITS RELATION TO SURROUNDING STRUCTURES – Roberto M Soriano, MD, Gustavo Pradilla, MD, C. Arturo Solares, MD; Emory University (SSO)

142: THE LATERAL CRANIOPHARYNGEAL CANAL (STERNBERG’S CANAL) IN PEDIATRIC AND ADULT POPULATIONS – Adedamola Adepoju¹, Christopher S Graffeo, MD², Lucas P Carlstrom, MD, PhD², Avital Perry, MD², Carlos D Pinheiro-Neto, MD, PhD³, Michael J Link, MD², Maria Peris-Celda, MD, PhD¹; ¹Department of Neurologic Surgery, Albany Medical Center, ²Department of Neurologic Surgery, Mayo Clinic, Rochester MN, ³Division of Otolaryngology and Head and Neck Surgery, Department of Surgery, Albany Medical Center

143: COMPARING THE PTERIONAL, SUPRAORBITAL, SUPRAORBITAL WITH ORBITAL OSTEOTOMY, AND EXTENDED ENDOSCOPIC TRANSPLANUM APPROACHES FOR REACHING THE ANTERIOR COMMUNICATING ARTERY COMPLEX: AN ANATOMICAL STUDY – Hongwei Zhu, MD, PHD^1,2, Amandeep S Ahluwalia³, Adib A Abla, MD^2,4, Ivan El-Sayed, MD^2,5, Roberto Rodriguez Rubio, MD^2,4,5; ¹Department of Neurological Surgery, The First Affiliated Hospital of Xiamen University, Xiamen, China, ²Skull Base & Cerebrovascular Laboratory, UCSF, ³University of Chicago, ⁴Department of Neurological Surgery, UCSF, ⁵Department of Otolaryngology – Head and Neck Surgery, UCSF

144: CEREBRAL REVASCULARIZATION FOR ANEURYSM TREATMENT IN THE ERA OF ENDOVASCULAR FLOW DIVERSION – Mohsen Nouri, MD, Julia R Schneider, Kevin Shah, MD, David J Bonda, MD, Amir R Dehdashti, MD; Department of Neurosurgery, North Shore University Hospital, Northwell Health, Manhasset, New York.

145: CLINICAL OUTCOMES OF THE SUPERIOR OPHTHALMIC VEIN (SOV) APPROACH FOR CLOSURE OF CAROTID CAVERNOUS FISTULAS – Jurij R Bilyk, MD¹, Archana Srinivasan, MD¹, Ann P Murchison, MD, MPH¹, Stavropoula I Tjoumakaris, MD², Pascal M Jabbour, MD²; ¹Wills Eye Hospital, ²Thomas Jefferson University Hospital

146: ENDOSCOPIC ENDONASAL ANEURYSM CLIPPING – Matthew E Welz, MS, Rudy J Rahme, Ahmad Kareem Almekkawi, Karl R Abi-Aad, Devi P Patra; Mayo Clinic

147: ANALYSIS OF THE SAFETY AND ADVANTAGE OF LIGATION/TRANSECTION OF THE SUPERIOR SAGITTAL SINUS AT THE LEVEL OF CRISTA GALLI. – BASAL INTERHEMISPHERIC APPROACH FOR ANTERIOR COMMUNICATING ARTERY ANEURYSMS – – Junichi Yamamoto, MD, PhD; Department of Neurosurgery, Albany Medical Center

148: TRANSETHMOIDAL ENDOSCOPIC ENDONASAL TREATMENT OF ETHMOIDAL ARTERY DURAL ARTERIOVENOUS FISTULAS – Nathan Quig, MD, Michael Cools, MD, Darshan Shastri, MD, Michael Catalino, MD, Adam Zanation, MD, Deanna Sasaki-Adams; University of North Carolina

149: GIANT FUSIFORM AND DOLICHOECTATIC ANEURYSMS OF THE BASILAR TRUNK AND VERTEBROBASILAR JUNCTION – CLINICOPATHOLOGICAL AND LONG-TERM FOLLOW-UP STUDY – Satoshi Kiyofuji, MD¹, Hirofumi Nakatomi, MD, PhD¹, Hideaki Ono, MD, PhD¹, Minoru Tanaka, MD, PhD¹, Kazuo Tsutsumi, MD, PhD², Hiroyasu Kamiyama, MD³, Nobuhito Saito, MD, PhD¹, Yoshiaki Shiokawa, MD, PhD⁴, Akio Morita, MD, PhD⁵, Kelly Flemming, MD⁶, Michael J Link, MD⁷; ¹Department of Neurosurgery, the University of Tokyo Hospital, ²Department of Neurosurgery, Showa General Hospital, ³Department of Neurosurgery and Stroke, Teishinkai Hospital, ⁴Department of Neurosurgery, Kyorin University, ⁵Department of Neurosurgery, Nippon Medical University, ⁶Department of Neurology, Mayo Clinic, ⁷Department of Neurologic Surgery, Mayo Clinic

150: PREDICTORS OF FUNCTIONAL OUTCOME IN PATIENTS WITH POOR-GRADE ANEURYSMAL SUBARACHNOID HEMORRHAGE – Sami Khairy, MD, Munzir Abbas, MD, Ahmed Aloraidi, MD, Ahmed Alkhani, MD, PhD; King Abdulaziz Medical City- Riyadh

151: INITIAL EXPERIENCE WITH EXOSCOPIC-BASED INTRAOPERATIVE INDOCYANINE GREEN FLUORESCENCE VIDEO ANGIOGRAPHY IN CEREBROVASCULAR SURGERY: ASSESSMENT OF FEASIBILITY, SAFETY AND NEXT GENERATION FORM-FACTOR – William Smithee, BSc, Srikant Chakravarthi, MD, MSc, Austin Epping, BSc, Mikaeel Kassam, BSc, Alejandro Monroy-Sosa, MD, Bhavani Kura, MD, Richard A Rovin, MD, Melanie B Fukui, MD, Amin B Kassam, MD; Aurora Neuroscience Innovation Institute

152: EPIDEMIOLOGY, NATURAL HISTORY, AND OPTIMAL MANAGEMENT OF NEUROHYPOPHYSEAL GERM CELL TUMORS – Avital Perry, MD, Hirokazu Takami, MD, PhD, Christopher S Graffeo, MD, Caterina Giannini, David J Daniels, MD, PhD; Mayo Clinic

153: ENDOSCOPIC ENDONASAL SURGERY AS AN ALTERNATIVE TO RADIOTHERAPY FOR RECURRENT OR RESIDUAL PITUITARY ADENOMAS – Eugenio Cardenas, MD, PhD¹, Ariel Kaen, MD, PhD¹, Edinson Najera, MD¹, Pablo Remon, MD², Ignacio Martin Schrader, MD¹, Alfonso Soto, MD²; ¹Department of Neurological Surgery, Hospital Universitario Virgen del Rocío, Sevilla, Spain, ²Department of Endocrinology and Nutrition, Hospital Universitario Virgen del Rocío, Sevilla, Spain

154: INTRAOPERATIVE, HISTOLOGICAL AND STIMULATED RAMAN SCATTER MICROSCOPY EVALUATION OF CAVERNOUS SINUS MEDIAL WALL DISEASE IN FUNCTIONAL PITUITARY TUMORS – Ahmed Mohyeldin, MD, PhD, Ayoze Doniz-Gonzalez, MD, Pedro Augusto Sousa Rodrigues, MD, Guillermo Blasco garcia de Andoain, MD, Kumar Abhinav, MD, Juan C Fernandez-Miranda, MD; Stanford University

156: OUTCOMES OF INTRAOPERATIVE ULTRASOUND FOR ENDOSCOPIC ENDONASAL TRANSSPHENOIDAL PITUITARY SURGERY – Joseph Domino, MD¹, Domenico Gattozzi, MD¹, Megan Jack, MD, PhD¹, Charoo Iyer, MBBS², Nick Harn, MD, PhD¹, David Beahm, MD¹, Roukoz Chamoun, MD¹; ¹University of Kansas Medical Center, ²Medical College, Majaraja Sayajirao University of Baroda

157: MODELING POST-OPERATIVE CORTISOL USING NORMALIZED DECAY RATES IN CUSHING’S DISEASE – Michael P Catalino, MD, MSc, Alexander Munoz, BA, Le Min, MD, PhD, Edward R Laws, Jr., MD; Brigham and Women’s Hospital

158: UNEXPECTED RESIDUAL AFTER ENDOSCOPIC TRANS-SPHENOIDAL SURGERY FOR LARGE AND GIANT PITUITARY ADENOMAS – Ivo Peto, MD¹, Timothy G White, MD², Abdullah M Abunimer, MD³, Hussam Abou-Al-Shaar, MD⁴, Kevin Kwan, MD², Katherine Wagner, MD², Mark B Eisenberg, MD², Margherita Bruni, MD², Amir R Dehdashti, MD²; ¹University of South Florida, ²Hofstra Northwell School of Medicine, ³Harvard Medical School, ⁴University of Pittsburgh Medical Center

159: RECURRENCE OF RATHKE’S CLEFT CYSTS BASED ON GROSS TOTAL RESECTION OF CYST WALL: A META-ANALYSIS. – Victor Lu, MD, PhD¹, Avital Perry¹, Christopher Graffeo, MD¹, Krishnan Ravindran², Jamie Van Gompel¹; ¹Mayo Clinic, ²University of Florida

160: PREDICTORS OF POSTOPERATIVE VISUAL OUTCOMES FOLLOWING SURGICAL OPERATION FOR CRANIOPHARYNGIOMAS – Srujan Kopparapu, Adham M Khalafallah, MD, Masaru Ishii, MD, PhD, Gary L Gallia, MD, PhD, Nicholas Rowan, MD, Debraj Mukherjee, MD, MPH; Johns Hopkins University School of Medicine

162: THE BENEFITS OF PROGRESSIVE OCCIPITAL CONDYLECTOMY IN ENHANCING THE FAR LATERAL APPROACH TO THE FORAMEN MAGNUM – Alexander X Tai, MD¹, Aalap Herur-Raman², Walter C Jean, MD³; ¹Medstar Georgetown University Hospital, ²Surgical Theater, ³George Washington University

163: COMPARISON OF THE IMPACT ON SIMULATED AIRFLOW AND HEAT TRANSPORT BETWEEN THE SUPERIOR ETHMOIDAL APPROACH FOR ENDOSCOPIC ENDONASAL ANTERIOR CRANIAL BASE RESECTION AND THE TRADITIONAL ENDOSCOPIC ANTERIOR CRANIAL BASE APPROACH. – Varun Patel, MD¹, Rohan Viswanathan, BS², Maria Peris-Celda, MD, PhD³, Tyler Kenning, MD³, Carlos Pinheiro-Neto, MD, PhD¹; ¹Division of Otolaryngology / Head and Neck Surgery, Department of Surgery, Albany Medical Center, Albany, New York, ²Albany Medical College, Albany, New York, ³Department of Neurosurgery, Albany Medical Center, Albany, New York

164: ENDOSCOPIC ENDONASAL ORBITAL SURGERY – Jeffrey Glicksman, MD¹, Maria Peris-Celda, MD, PhD^2,3, Tyler Kenning, MD², Edward Wladis, MD⁴, Carlos Pinheiro-Neto, MD, PhD^1,2; ¹Division of Otolaryngology / Head and Neck Surgery, Department of Surgery, Albany Medical Center, Albany, New York, ²Department of Neurosurgery, Albany Medical Center, Albany, New York, ³Adjunct Assistant Professor, Department of Neurosurgery, Mayo Clinic, Rochester, Minnesota, ⁴Department of Opthalmology, Albany Medical Center, Albany, New York

165: GAINS REALIZED IN PITUITARY CARCINOMA SURVIVAL: A CONTEMPORARY EVALUATION USING THE SEER DATABASE. – Nathan J Wallace, BS, Anand K Devaiah, MD; Boston University School of Medicine

166: ENDOSCOPIC TRANSNASAL ODONTOIDECTOMY: A SINGLE-CENTER’S EXPERIENCE AND APPROACH TO PATHOLOGY OF THE CRANIOCERVICAL JUNCTION – Rocco M Dabecco, Raj Nangunoori, Alexander Yu; Allegheny General Hospital

167: DISCONTINUATION OF POSTOPERATIVE PROPHYLACTIC ANTIBIOTICS FOR ENDOSCOPIC ENDONASAL SURGERY – Carolina G Benjamin, MD¹, Yosef Dastagirzada, MD², Julia Bevilacqua, AGACNP-BC, ANPC², Jason Gurewitz, BA², Chandra Sen, MD², John G Golfinos², Dimitris Placantonakis², Jafar J Jafar², Rich Lebowtiz², Seth Lieberman², Ariane Lewis, MD², Donato Pacione, MD²; ¹University of Miami, ²NYU Langone Medical Center

168: AUTOMATED MENINGIOMA DETECTION AND SEGMENTATION USING DEEP NEURAL NETWORKS – Maya Harary¹, Alessandro Boaro², Vasilios Kavouridis², Jakub Kaczmarzyk³, Marco Mammi², Hassan Dawood², Satraijt Ghosh³, Omar Arnaout²; ¹Department of Neurosurgery, David Geffen School of Medicine, University of California Los Angeles, ²Computational Neuroscience Outcomes Center, Department of Neurosurgery, Brigham and Women’s Hospital, ³McGovern Institute, Massachusetts Institute of Technology

169: MOLECULAR TAXONOMY OF MENINGIOMA – Wenya Linda Bi, MD, PhD¹, Samantha Hoffman, BS¹, Eleanor Woodward, BS¹, Joseph Driver, MD¹, Sherwin Tavakol, BA¹, Ayal A Aizer, MD¹, Malak Abedalthagafi², Ossama Al-Mefty, MD¹, Ian F Dunn³, Sandro Santagata, MD, PhD¹; ¹Brigham and Women’s Hospital, ²Saudi Human Genome Laboratory, King Fahad Medical City and King Abdulaziz City for Science and Technology, ³Oklahoma University Health Science Center

170: GAMMA KNIFE RADIOSURGERY FOR PATIENTS WITH FORAMEN MAGNUM MENINGIOMAS: COHORT STUDY – Salomon Cohen, MD, Avital Perry, MD, Christopher S Graffeo, MD, Carlstrom P Lucas, MD, Pollock E Bruce, MD, Link J Michael, MD; Mayo Clinic, Rochester, Department of Neurologic Surgery

171: SURGICAL IMPLICATION OF THE SUPRALABYRINTHINE AIRCELL TRACT IN COMBINED PETROSAL APPROACH – Je Beom Hong, MD¹, Chang Ki Hong, MD, PhD², Hankyu Kim, MD, PhD³; ¹Kangbuk Samsung Hospital, ²Gangnam Severance Hospital, ³Cha Bundang Medical Center

172: ACCESS CORRIDOR FOR INTENTIONALLY TARGET DEVASCULARIZATION OF FEEDING ARTERIES OF THE PETROCLIVAL MENINGIOMA – Kentaro Watanabe, MD; Jikei Medical University

173: PHOSPHOPROTEOMIC AND KINOMIC SIGNATURE OF CLINICALLY AGGRESSIVE GRADE I (1.5) MENINGIOMAS REVEALS RB1 SIGNALING AS A NOVEL MEDIATOR AND BIOMARKER – Jacob Ruzevik, MD, Sam Emerson, MD, PhD, Kate Carroll, Manuel Ferreira Jr.; University of Washington

174: PREDICTING DISCHARGE DISPOSITION FOLLOWING MENINGIOMA RESECTION USING A MULTI-INSTITUTIONAL NATURAL LANGUAGE PROCESSING MODEL – Meredith A Monsour, BS¹, Whitney E Muhlestein, MD², Gabriel Friedman, MD³, Aniket Zinzuwadia, AB⁴, Marcus Zachariah, MD³, Jean-Valery Coumans, MD³, Bob Carter, MD, PhD³, Lola B Chambless, MD⁵; ¹Vanderbilt University School of Medicine, ²Department of Neurosurgery, University of Michigan Medical Center, Ann Arbor, MI, USA, ³Department of Neurosurgery, Massachusetts General Hospital, Boston, MA, USA, ⁴Harvard Medical School, Boston, MA, USA, ⁵Department of Neurological Surgery, Vanderbilt University Medical Center, Nashville, TN, USA

175: EXPLORING WHETHER STATINS OR METFORMIN INFLUENCE THE GROWTH OF VESTIBULAR SCHWANNOMAS – Shafeen Qazi, Sophia Tran, Sanjana Balachandra, Daniel E Killeen, MD, Jacob B Hunter, MD; University of Texas Southwestern Medical Center

176: VESTIBULAR SCHWANNOMAS GUIDELINES – Roberto Leal Da Silveira, PhD, Eder da Silva Rocha, MD; Madre Teresa institute

177: SUPERIOR SEMICIRCULAR CANAL DEHISCENCE REVISIONAL SURGERY OUTCOMES – Kevin Ding, BS¹, Prasanth Romiyo, BS¹, Edwin Ng, BS¹, Dillon Dejam, BS¹, Roan N Anderson¹, Adam Enomoto¹, Courtney Duong, BS¹, John P Sheppard¹, Matthew Z Sun, MD¹, H. Westley Phillips, MD¹, Quinton Gopen, MD², Isaac Yang, MD²; ¹UCLA Department of Neurosurgery, ²UCLA Department of Head and Neck Surgery

178: TRANS TEMPORAL VENOUS DECOMPRESSION FOR PULSATILE TINNITUS – Patrick Slater, MD; Austin Ear Clinic

179: COCHLEAR IMPLANTATION AFTER RADIOSURGERY FOR VESTIBULAR SCHWANNOMA – Neil S Patel, MD, Michael J Link, MD, Brian A Neff, MD, Matthew L Carlson, MD, Colin L Driscoll, MD; Mayo Clinic

180: CAN’T STOP, WON’T STOP: ASSESSING THE IMPACT OF TINNITUS ON PATIENT-REPORTED HEARING-RELATED QUALITY-OF-LIFE OUTCOMES IN VESTIBULAR SCHWANNOMA – Avital Perry, MD¹, Christopher S Graffeo, MD¹, Maria Peris-Celda, MD, PhD², Lucas P Carlstrom, MD, PhD¹, Geffen Kleinstern, PhD¹, Matthew L Carlson, MD¹, Michael J Link, MD¹; ¹Mayo Clinic, ²Albany Med

181: KEYHOLE MIDDLE FOSSA APPROACH WITH TITANIUM MESH “GULL WING” REPAIR FOR TEGMEN DEFECTS – Andrew K Wong, MD¹, Michael Shinners, MD², Ricky H Wong, MD²; ¹Rush University, ²Northshore University

182: VESTIBULAR SCHWANNOMA CLINICAL PHENOTYPES ARE ASSOCIATED WITH DIFFERENTIAL METHYLATION PATTERNS – Avital Perry, MD, Christopher S Graffeo, MD, MS, Lucas P Carlstrom, MD, PhD, Amanda Munoz Casabella, MD, Matthew L Carlson, MD, Colin L Driscoll, MD, Michael J Link, MD; Mayo Clinic

183: THE RHINOPHARYNGEAL (RP) FLAP AS AN ADJUNCT TO ENDOSCOPIC ENDONASAL RECONSTRUCTION OF LOWER CLIVAL AND CRANIOVERTEBRAL JUNCTION DEFECTS – Pierre-Olivier Champagne, MD, Georgios Zenonos, MD, Eric E Wang, MD, Carl H Snyderman, MD, Paul A Gardner, MD; University of Pittsburgh Medical Center

184: PETROUS APEX CEPHALOCELES: RADIOLOGY FEATURES AND SURGICAL MANAGEMENT OF A RARE ENTITY – Madeline Epsten, Mehmet Kocak, MD, Andre Beer Furlan, MD, Bledi C Brahimaj, MD, Richard W Byrne, MD, R. Mark Wiet, MD; Rush University Medical Center

185: EVALUATING SELLAR HEALING FOLLOWING VARIOUS RECONSTRUCTION TECHNIQUES IN TRANSSPHENOIDAL SURGERY: AN IMAGING AND ENDOSCOPIC REVIEW – Mark B Chaskes, MD, MBA, Joshua Mccambridge, MD, Chandala Chitguppi, MD, Tawfiq Khoury, MD, Pascal Lavergne, MD, Mindy R Rabinowitz, MD, Gurston G Nyquist, MD, Marc Rosen, Adam E Flanders, MD, James J Evans, MD; Thomas Jefferson University Hospital

186: INFERIOR MEATUS MUCOSAL FLAP BASED ON THE INCISIVE FORAMEN ARTERY FOR SEPTAL RECONSTRUCTION AND RESURFACING OF SEPTUM DONOR SITE AFTER NASOSEPTAL FLAP HARVEST – Randall S Ruffner, MD, Marcelo Charles, MD, Tyler Kenning, MD, Maria Peris-Celda, MD, PhD, Carlos Pinheiro-Neto, MD, PhD; Albany Medical Center

187: COMPARATIVE ANALYSIS OF AUTOGRAFT AND XENOGRAFT BASED SPINAL FLUID LEAK PREVENTION AFTER TRANSLABYRINTHINE RESECTION OF CEREBELLOPONTINE ANGLE TUMORS. – Douglas J Totten, BA¹, Nauman F Manzoor, MD², Alexander D Sherry, BS¹, Robert J Yawn, MD³, Reid C Thompson, MD⁴, David S Haynes, MD², Alejandro Rivas, MD²; ¹Vanderbilt University School of Medicine, ²Department of Otolaryngology, Vanderbilt University Medical Center, ³Department of Otolaryngology, University of Tennessee Health Science Center, ⁴Department of Neurologic Surgery, Vanderbilt University Medical Center

188: OPERATIVE STRATEGY IN LATERAL SKULL BASE RECONSTRUCTION: COMPARATIVE OF RIGID AND NON RIGID TECHNIQUES. – Kristen Yancey, MD¹, Nauman F Manzoor, MD¹, Douglas J Totten, BA², Alexander D Sherry, BS², Alejandro Rivas, MD¹, David S Haynes, MD¹; ¹Department of Otolaryngology, Vanderbilt University Medical Center, ²Vanderbilt University School of Medicine

189: SPONTANEOUS CEREBROSPINAL FLUID LEAKS FROM MULTIPLE ANTERIOR AND LATERAL SKULL BASE DEFECTS – Nofrat Schwartz, Deanna Sasaki-Adams, Kevin D Brown, Adam M Zanation, Brian D Thorp, Brendan P O’Connell; University of North Carolina School of Medicine

190: THE ROLE OF DIAMOX AND HIGH-VOLUME LUMBAR PUNCTURE FOR TREATMENT OF IATROGENIC POST-OPERATIVE CEREBROSPINAL FLUID LEAK – Aria Jamshidi, MD, Aashish Shah, Rick Komotar, MD, Michael Ivan; Jackson Memorial Hospital

191: THE IMPORTANCE OF LONG TERM FOLLOW UP AFTER ENDOSCOPIC PITUITARY SURGERY: DURABILITY OF RESULTS AND TUMOR RECURRENCE – Joao Paulo Almeida, MD, Hirokazu Takami, MD, Raha Tabasinejad, MD, Miguel Marigil Sanchez, MD, PhD, Carlos Velasquez, MD, PhD, Gelareh Zadeh, MD, PhD, Fred Gentili, MD; University of Toronto

192: LONG-TERM OUTCOMES OF TRANSPHENOIDAL SURGERY FOR MANAGEMENT OF GROWTH-HORMONE SECRETING ADENOMAS: SINGLE CENTER RESULTS – Mohammed Asha, MD, Hirokazu Takami, MD, Carlos Velasquez, MD, Selfy Oswari, MD, Joao Paulo Almeida, MD, Gelareh Zadeh, MD, PhD, Fred Gentili, MD; University of Toronto

193: PITUITARY INCIDENTALOMA AND NON-INCIDENTALOMA: A COMPARISON OF PRETREATMENT AND POSTOPERATIVE CHARACTERISTICS – Kurren S Gill, MD, Chandala Chitguppi, MD, Rahul Alapati, Sarah Collopy, Prachi Patel, Tawfiq Khoury, MD, Pascal Lavergne, MD, Mindy Rabinowitz, MD, Gurston Nyquist, MD, Marc Rosen, MD, Christopher Farrell, MD, James Evans, MD; Thomas Jefferson University Hospital

194: DO WE NEED INTRAOPERATIVE MAGNETIC RESONANCE IMAGING IN ALL ENDOSCOPIC ENDONASAL PITUITARY ADENOMA SURGERY CASES? A RETROSPECTIVE STUDY – Emrah Celtikci, MD, Hakan Emmez, MD; Gazi University Faculty of Medicine Department of Neurosurgery

195: ASSOCIATION OF PREOPERATIVE HEMORRHAGE WITH POSTOPERATIVE HORMONAL DYSFUNCTION IN SURGICALLY RESECTED PITUITARY ADENOMAS – Reyanne Strong¹, Nathan Quig, MD², Avinash Chandran, PhD³, Carlos Zamora, MD⁴, Carolyn Quinsey, MD²; ¹University of North Carolina School of Medicine, ²Department of Neurosurgery, University of North Carolina School of Medicine, ³Matthew Gfeller Sport-Related TBI Research Center, Department of Exercise and Sport Science, University of North Carolina, ⁴Department of Radiology, Division of Neuroradiology, University of North Carolina School of Medicine

196: PITUITARY APOPLEXY: MANAGEMENT AND OUTCOMES AT A SINGLE CENTER OVER 15 YEAR EXPERIENCE – Scott C Seaman, MD, Mark C Dougherty, MD, Mario Zanaty, MD, Leslie A Bruch, MD, Scott M Graham, MD, Jeremy D Greenlee, MD; University of Iowa Hospitals and Clinics

197: ENDOSCOPIC ENDONASAL APPROACH TO GIANT PITUITARY ADENOMAS IN LOW INCOME COUNTRY. SINGLE SURGEON EXPERIENCE FROM AZERBAIJAN. – Tural Rahimli, DR; Baku Medical Plaza

198: PREDICTING PITUITARY ADENOMAS CONSISTENCY WITH PREOPERATIVE MAGNETIC RESONANCE ELASTOGRAPHY – Salomon Cohen Cohen, MD¹, Joshua D Hughes, MD¹, Ziying Yin, PhD², Matthew K Ball, DO, MS³, John Huston III, MD², Jamie J Van Gompel, MD¹; ¹Mayo Clinic, Rochester, Department of Neurologic Surgery, ²Mayo Clinic, Rochester, Department of Radiology, ³Mayo Clinic, Rochester, Department of Pathology

199: ADENOID CYSTIC CARCINOMA OF THE SKULL BASE: RETROSPECTIVE NATIONAL COHORT ANALYSIS OF TREATMENT PARADIGMS AND OUTCOMES – Shekhar K Gadkaree, MD¹, Anuraag S Parikh, MD¹, Eric Barbarite¹, Andrew Holcomb, MD¹, Justin McCarty², Stacey T Gray¹, Derrick T Lin¹; ¹Massachusetts Eye and Ear, Harvard Medical School, ²Department of Surgery, St. Elizabeth’s Medical Center, Tufts University School of Medicine, Boston, MA

200: DECISION-TREE CLASSIFICATION OF CHORDOMAS AND CHONDROSARCOMAS – John Luebs¹, Tyson Tragon, MD², Katie Traylor, MD², Carl H Snyderman, MD, MBA³; ¹SUNY Downstate Health Sciences University, ²Department of Radiology, University of Pittsburgh Medical Center, ³UPMC Center for Cranial Base Surgery

201: THE ROLE OF CERVICAL AND PAROTID LYMPH NODES IN SURGICAL MANAGEMENT OF MALIGNANT TUMORS OF THE LACRIMAL SAC – Brian Swendseid, MD¹, Joseph Godovchik¹, Swar Vimawala¹, Samuel Garrett¹, Michael Topf, MD², Adam Luginbuhl, MD¹, David Cognetti, MD¹, Joseph Curry, MD¹; ¹Thomas Jefferson University Hospitals, ²Stanford University

202: NEW CLASSIFICATION OF ENDOSCOPIC TRANSNASAL NASOPHARYNGECTOMY FOR RECURRENT NASOPHARYNGEAL CARCINOMA: SHANGHAI EENT HOSPITAL EXPERIENCE – Hongmeng Yu, Quan Liu, Xicai Sun, Yurong Gu, Houyong Li, Dehui Wang; Department of Otolaryngology Eye, Ear, Nose and Throat Hospital Shanghai Medical College of Fudan University

203: ENDOSCOPIC ENDONASAL NASOPHARYNGECTOMY AND ITS USE IN RT3 AND RT4 RECURRENT NASOPHARYNGEAL CARCINOMA – Roberto M Soriano, MD, Rima S Rindler, MD, Gustavo Pradilla, MD, C. Arturo Solares, MD; Emory University (SSO)

204: RADIOLOGICAL FINDINGS OF MEDIAL ORBITAL WALL BONY AND PERIORBITAL DEHISCENCE IN SINONASAL MALIGNANCIES AS A PREDICTOR OF FINAL HISTOPATHOLOGIC ORBITAL INVASION – Prachi N Patel, BA¹, Tawfiq Khoury, MD¹, Chandala Chitguppi, MD¹, Kurren Gill, MD¹, Gurston Nyquist, MD¹, Marc Rosen, MD¹, Pascal Lavergne, MD, FRCSC², James Evans, MD², Mindy Rabinowitz, MD¹; ¹Thomas Jefferson University, Department of Otolaryngology – Head and Neck Surgery, ²Thomas Jefferson University, Department of Neurosurgery

205: SURGICAL MANAGEMENT OF SKULL BASE CHORDOMAS: SINGLE CENTER RESULTS IN THE LAST 10 YEARS. – Joao Paulo Almeida, MD, Randy Van Ommeren, MD, Jeffrey Zuccato, MD, Allan Vescan, MD, John de Almeida, MD, Eric Monteiro, MD, Ian Witterick, MD, Fred Gentili, MD, Gelareh Zadeh, MD, PhD; University of Toronto

206: THE IMPACT OF INDUCTION CHEMOTHERAPY AND SOCIOECONOMIC FACTORS ON SURVIVAL IN SINONASAL UNDIFFERENTIATED CARCINOMA – Khodayar Goshtasbi, BS¹, Brandon M Lehrich, BS², Arash Abiri, BS¹, Tyler Yasaka, BS², Frank P Hsu, MD, PhD³, Gilbert Cadena, MD³, Edward C Kuan¹; ¹University of California Irvine Department of Otolaryngology – Head and Neck Surgery, ²University of California Irvine, ³University of California Irvine Department of Neurological Surgery

207: THIRTY-DAY COMPLICATIONS FOLLOWING INTRADURAL VERSUS EXTRADURAL EXCISION OF THE SKULL BASE – Khodayar Goshtasbi, BS, Arash Abiri, BS, Mehdi Abouzari, MD, Harrison W Lin, MD, Hamid R Djalilian, MD, Edward C Kuan, MD, MBA; University of California Irvine Department of Otolaryngology – Head and Neck Surgery

208: CASE SERIES OF SKULL BASE MENINGIOMA RESECTIONS IN THE OCTOGENARIAN POPULATION – Dorian M Kusyk, MD, Gordon Mao, MD, Alexander Yu, MD; Allegheny General Hospital

209: IDENTIFICATION OF THE AGGRESSIVE ATYPICAL MENINGIOMA: HISTOPATHOLOGY, PROTEOMIC SIGNATURES AND GENOTYPING – Kate Carroll, MD, Jake Ruzevick, MD, Sam Emerson, MD, PhD, Manuel Ferreira Jr.; University of Washington

210: MANAGEMENT OF PETROCLIVAL TUMORS – Diego Mendez Rosito, MD; Centro Medico Nacional 20 de Noviembre, ISSSTE

211: EVALUATING THE SAFETY OF LIGATING THE ANTERIOR SUPERIOR SAGITTAL SINUS – Racheal Peterson, MD, Jennifer Kosty, MD, Bharat Guthikonda, MD; LSUHSC Shreveport

212: SHORT TERM OLFACTORY CHANGES AFTER ENDOSCOPIC TRANSSPHENOIDAL PITUITARY SURGERIES: IDENTIFICATION, DISCRIMINATION AND THRESHOLD RESULTS – Hazan Basak, Deniz Uluc, Suha Beton, Assoc Prof, Gokmen Kahilogullari, Cem Meco, Prof; Ankara University

213: FREE FLAP RECONSTRUCTION OF SKULL BASE DEFECTS: A RETROSPECTIVE REVIEW – Sen J Ninan, BA, Katherine Liu, BA, Todd Spock, MD, Eric Lee, MD, Andrey Filimonov, MD, Brett Miles, MD, Alfred M Iloreta, MD; Icahn School of Medicine at Mount Sinai

214: PREDICTIVE VALUE OF THE ACS-NSQIP SURGICAL RISK CALCULATOR IN PATIENTS UNDERGOING TRANSSPHENOIDAL HYPOPHYSECTOMY – Ashlee N Seldomridge¹, Meghan T Turner, MD²; ¹West Virginia University School of Medicine, ²Department of Otolaryngology/Head & Neck Surgery, West Virginia University School of Medicine

215: EFFICACY AND SAFETY OF BEVACIZUMAB FOR VESTIBULAR SCHWANNOMA IN NEUROFIBROMATOSIS TYPE 2: A SYSTEMATIC REVIEW AND META-ANALYSIS OF TREATMENT OUTCOMES. – Victor Lu¹, Ravindran Krishnan², Christopher Graffeo¹, Avital Perry¹, Jamie Van Gompel¹, David Daniels¹, Michael Link¹; ¹Mayo Clinic, ²University of Florida

216: NOVEL GRADING SYSTEM OF SIGMOID SINUS DEHISCENCE FOR RADIOLOGIC EVALUATION OF PULSATILE TINNITUS – Shelby Willis, BS¹, Courtney Duong, BS², Isaac Yang, MD², Quinton Gopen, MD¹; ¹Department of Head and Neck Surgery, University of California Los Angeles, ²Department of Neurosurgery, University of California Los Angeles

217: THE CLINICAL IMPLICATIONS OF SPONTANEOUS HEMORRHAGE IN VESTIBULAR SCHWANNOMAS – Christopher S Hong, MD, Lan Jin, PhD, Yawaei Zhang, PhD, Wyatt B David, MS, Brian Shear, BS, E Z Erson-Omay, PhD, Robert K Fulbright, MD, Anita Huttner, MD, John Kveton, MD, Jennifer Moliterno, MD; Yale University School of Medicine

218: PRELIMINARY RESULTS OF SEMI-SITTING RETROSIGMOID SURGERY FOR VESTIBULAR SCHWANNOMAS FROM A NORTH AMERICAN SKULL BASE PRACTICE – Domenico A Gattozzi, MD, Mairaj T Sami, MD, Casey Rosso, BS, Roukoz B Chamoun, MD, Kushal J Shah, MD, Hinrich Staecker, MD, PhD, James Lin, MD, Helena Wichova, MD, Paul J Camarata, MD, FAANS, FACS; University of Kansas Medical Center

219: SURGERY AFTER SURGERY FOR VESTIBULAR SCHWANNOMA – Lukasz Przepiorka, MD¹, Przemyslaw Kunert, MD, PhD¹, Tomasz Dziedzic, MD, PhD¹, Wiktoria Rutkowska², Andrzej Marchel, MD, PhD¹; ¹Department of Neurosurgery, Medical University of Warsaw, Warsaw, Poland, ²Medical University of Warsaw, Warsaw, Poland

220: QUALITY OF LIFE ASSESSMENT AMONG VESTIBULAR SCHWANNOMA PATIENTS TREATED WITH MICROSURGERY VS. STEREOTACTIC RADIOSURGERY VS. OBSERVATION. – Komal Naeem, MD, Mohamed Labib, MD, Malika Bhargava, Michele Wang, Randall Porter; Barrow Neurological Institute

221: SURGICAL RESECTION AFTER RADIOSURGERY FOR THE MANAGEMENT OF VESTIBULAR SCHWANNOMAS: A SYSTEMATIC REVIEW – Max Whitmeyer¹, Bledi C Brahimaj, MD², Andre Beer Furlan, MD², Sameer Alvi, MD³, Richard W Byrne, MD², Madeline Epsten², R. Mark Wiet, MD²; ¹Ohio State University, ²Rush University Medical Center, ³Northwestern Medicine Regional Medical Group

222: SIGMOID SINUS PATENCY FOLLOWING VESTIBULAR SCHWANNOMA RESECTION VIA RETROSIGMOID VERSUS TRANSLABYRINTHINE RESECTION – Andrea M Ziegler, MD¹, Nadeem El-Kouri, MD², Zaneta Dymon, MD¹, David Serrano, MD¹, Mariah Bashir, MD¹, Douglas Anderson, MD¹, John Leonetti, MD¹; ¹Loyola University Medical Center, ²Loyola University Stritch School of Medicine

223: MINIMIZING POSTOPERATIVE CSF LEAKS: AN ALGORITHM FOR SELLAR RECONSTRUCTION FOLLOWING TRANSPHENOIDAL PITUITARY SURGERY – Stephanie Flukes, MD, Lily Mclaughlin, Marc A Cohen, MD, Vivian Tabar, MD; Multidisciplinary Pituitary and Skull Base Tumor Program, Memorial Sloan Kettering Cancer Center

224: SURGICAL OUTCOMES OF THE ENDONASAL ENDOSCOPIC APPROACH WITHIN A STANDARDIZED MANAGEMENT PROTOCOL FOR REPAIR OF SPONTANEOUS CSF LEAKS: A RETROSPECTIVE REVIEW OF 46 PATIENTS – Daniel Kreatsoulas, MD¹, Varun Shah, BS², Douglas Hardesty, MD¹; ¹The Ohio State University Wexner Medical Center, ²The Ohio State University College of Medicine

225: INSTITUTIONAL INSIGHT ON FATLESS RECONSTRUCTION OF THE SKULL BASE FOR CSF LEAK REPAIR FOLLOWING ENDOSCOPIC TRANSNASAL TRANSPHENOIDAL SURGERY: 44 CASE SERIES. – Sophie M Peeters, MD, Marvin Bergsneider, MD, Marilene Wang, MD, Jivianne Lee, MD, Jeffrey Suh, MD, Won Kim, MD; UCLA

226: OUTCOMES FOR REPAIR OF MIDDLE CRANIAL FOSSA ENCEPHALOCELES USING PEDICLED TEMPORALIS MYOFASCIAL FLAPS WITH BONE GRAFTS – Matthew R Bartindale, MD, Douglas D Backous, MD; Puget Sound ENT

227: STRAWS DON’T SUCK – Erin K Reilly, MD, Mindy R Rabinowitz, MD, Colin T Huntley, MD, Maurits S Boon, MD, Judd Fastenberg, MD, Gregory A Epps, MD, Swar Vimawala, Chandala Chitguppi, Jena Patel, Gurston G Nyquist, Marc R Rosen, James J Evans; Thomas Jefferson University Hospital

229: RELATIONSHIP BETWEEN RECURRENCE RATES OF RATHKE’S CLEFT CYSTS AND SURGICAL APPROACHES TO SELLAR RECONSTRUCTION – Rebecca Limb, BMBS, BMedSci, James King, FRACS, MBBS, PhD; Royal Melbourne Hospital, Melbourne, Australia

230: SOFT GASKET SEAL: REFINING THE CLOSURE TECHNIQUE FOLLOWING EEA. CASE SERIES AND REVIEW OF LITERATURE – Thiago Albonette Felicio, MD¹, Gustavo Guimarães Rangel, MD², Mostafa Shahein, MD^1,3, Giuliano Schmidt Bertazzo Silveira, MD¹, Rafael Martinez-Perez, MD¹, Marcus Zachariah, MD, PhD¹, Luis C Requena-Requena, MD¹, Douglas Hardesty, MD¹, Bradley A Otto, MD², Ricardo L Carrau, MD², Daniel M Prevedello, MD¹; ¹The Ohio State University Wexner Medical Center, Department of Neurological Surgery, ²The Ohio State University Wexner Medical Center, Department of Otolaryngology and Head and Neck, ³Aswan University, Department of Neurological Surgery, Aswan, Egypt

231: VISUAL AND ENDOCRINE RECOVERY FOLLOWING CONSERVATIVE AND SURGICAL TREATMENT OF PITUITARY APOPLEXY: A META-ANALYSIS – Khodayar Goshtasbi, BS, Arash Abiri, BS, Ronald Sahyouni, PhD, Hossein Mahboubi, MD, Sophia Raefsky, BS, Edward C Kuan, MD, MBA, Frank P Hsu, MD, PhD, Gilbert Cadena, MD; University of California Irvine

233: PITUITARY ADENOMA RECURRENCE: MODELLING USING A NEW MODIFICATION OF THE SIPAP CLASSIFICATION – Mohammed S Alahmari, MD¹, Fahad Alkherayf, MSc, MD², Andrea Lasso, MSc¹, Fatmahalzahra Banaz, MD¹, Sepideh Mohajeri, MD¹, Pourya Masoudian, MD¹, Andre Lamothe, MD¹, Charles Agbi, MD², Lisa Caulley, MSc, MD¹, Mohammad Alshardan, MD², Shaun Kilty, MD¹; ¹Department of Otolaryngology-Head and Neck Surgery, University of Ottawa, Ottawa, Canada., ²Division of Neurosurgery, Department of Surgery, University of Ottawa, Ottawa, Canada

234: MARSUPIALIZATION OF RATHKE’S CLEFT CYSTS DOES NOT INCREASE THE RISK OF POST-OPERATIVE INTRACRANIAL INFECTION. – Thad W Vickery, MD¹, Sophie Peeters, MD², Alina Chen, BA³, Sahyouni Ronald, BS⁴, Edward C Kuan, MD, MBA⁴, Marvin Bergsneider, MD², Wang Marilene, MD¹; ¹David Geffen School of Medicine at UCLA, Department of Head and Neck Surgery, ²David Geffen School of Medicine at UCLA, Department of Neurosurgery, ³David Geffen School of Medicine at UCLA, ⁴University of California Irvine School of Medicine, Department of Head and Neck Surgery

235: SURGICAL OUTCOME OF ENDOSCOPIC TRANSSPHENOIDAL PITUITARY ADENOMA RESECTION IN ELDERLY PATIENTS COMPARED TO YOUNGER PATIENTS. – Kira A Murphy, MD¹, Chandala Chitguppi, MD¹, Pascal Lavergne, MD², Prachi Patel, BA¹, Tawfiq Khoury, MD¹, Mindy Rabinowitz, MD¹, Gurston G Nyquist, MD¹, Marc R Rosen, MD¹, Christopher J Farrell, MD², James J Evans, MD²; ¹Department of Otolaryngology – Head and Neck Surgery, Thomas Jefferson University Hospital, ²Thomas Jefferson University Hospital

236: RACIAL AND ETHNIC DIFFERENCES IN PRESENTING CHARACTERISTICS OF PITUITARY ADENOMA PATIENTS AND OUTCOMES – Angela M Richardson, Taylor Hartlein, G D Brusko, Ricardo J Komotar, Jacques J Morcos, Corinna G Levine; University of Miami / Jackson Memorial Hospital

237: CAVERNOUS SINUS EXPLORATION IN CUSHING’S DISEASE: INDICATIONS AND OUTCOMES – Elizabeth Hogan, MD¹, Gretchen Scott,, RN², Charlampos Lysikatos-Lyssikatos, MD³, Raven McGlotten, RN⁴, Constantine Stratakis, MD, DSc⁵, Lynnette Nieman, MD³, Prashant Chittiboina, MD²; ¹George Washington University Department of Neurosurgery and Surgical Neurology Branch, National Institute of Neurological Disorders and Stroke, ²Surgical Neurology Branch, National Institute of Neurological Disorders and Stroke, ³Eunice Kennedy Shriver National Institute of Diabetes and Kidney Disease, National Institutes of Health, ⁴National Institute of Diabetes and Digestive and Kidney Diseases, ⁵Section on Endocrinology and Genetics, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health

238: ANALYSIS OF PREOPERATIVE IMAGING AS A PREDICTIVE MARKER FOR INTRAOPERATIVE AND POSTOPERATIVE SURGICAL MANAGEMENT IN THE ENDOSCOPIC ENDONASAL RESECTION OF PITUITARY MACROADENOMAS – Laila Perez de San Roman Mena, MD, Srikant Chakravarthi, MD, MSc, Melanie B Fukui, MD, Austin Epping, BSc, Alejandro Monroy-Sosa, MD, Sammy Khalili, MD, Juanita M Celix, MD, Bhavani Kura, MD, Richard A Rovin, MD, Amin B Kassam, MD; Aurora Neuroscience Innovation Institute

239: TRANSSPHENOIDAL APPROACH FOR PITUITARY ADENOMAS IN THE ELDERLY: META-ANALYSIS OF SAFETY AND SURGICAL EFFICACY – Angela M Richardson, Sumedh S Shah, Justin Cheng, Ricardo J Komotar, Michael E Ivan, Jacques J Morcos; University of Miami / Jackson Memorial Hospital

240: FIRST-IN-HUMAN INTRAOPERATIVE MRI COIL FOR HIGH RESOLUTION IMAGING DURING TRANSSPHENOIDAL SURGERY – Elizabeth Hogan, MD¹, Lalith Talagala, PhD², Joelle Sarlls, PhD², Hellmut Merkle, PhD³, Alan Koretsky³, Gretchen Scott,, RN⁴, John Butman, MD, PhD⁵, Prashant Chittioina, MD⁴; ¹George Washington University Department of Neurosurgery and Surgical Neurology Branch, National Institute of Neurological Disorders and Stroke, ²NIH MRI Research Facility, ³Laboratory of Functional and Molecular Imaging, National Institute of Neurological Disorders and Stroke, ⁴Surgical Neurology Branch, National Institute of Neurological Disorders and Stroke, ⁵Radiology and Imaging Sciences, the National Institutes of Health

241: A SINGLE-CENTER EXPERIENCE IN BRACHYTHERAPY FOR TREATMENT-REFRACTORY NON-SECRETING PITUITARY ADENOMAS – Aaron R Plitt, MD, Ashleigh Halderman, MD, Robert Timmerman, MD, Bruce Mickey, MD, Samuel L Barnett, MD; UT Southwestern

242: A PATIENT-DRIVEN QUALITY IMPROVEMENT INITIATIVE FOR PITUITARY ADENOMA CARE – Irene Druce, MD, MSc, Mary-Anne Doyle, MD, Amel Arnaout, MD, Dora Liu, MD, Fahad Alkherayf, MD, MSc, Charles Agbi, MD, Erin Keely, MD, Janine Malcolm, MD; University of Ottawa

243: MORPHOMETRIC CHANGES IN THE SKULL IN ACROMEGALIC PATIENTS: ANATOMICAL PERSPECTIVE AND SURGICAL IMPLICATIONS – Danielle de Lara, MD¹, Joao G Valim¹, Louise B Willrich¹, Thiago B Sonego, MD²; ¹Universidade Regional de Blumenau, ²Hospital Santa Isabel

244: SURGICAL OUTCOME OF ENDOSCOPIC ENDONASAL VERSUS MICROSURGICAL TRANSSPHENOIDAL APPROACH FOR PITUITARY ADENOMAS: AN INSTITUTIONAL EXPERIENCE. – Ovanes Akobyan, MD¹, Yury Shulev, PhD², Marat Yusupov, MD¹; ¹City Hospital 2, ²North-Western State Medical University Named After I.I. Mechnikov

245: RECOVERY OF CRANIAL NERVE DEFICITS IN PATIENTS PRESENTING WITH PITUITARY APOPLEXY: A CASE SERIES – Mohammed Alahmari, MD¹, Fahad Alkherayf, MSc, MD², Andrea Lasso, MSc¹, Fatmahalzahra Banaz, MD¹, Sepideh Mohajeri, MD¹, Pourya Masoudian, MD¹, Andre Lamothe, MD¹, Charles Agbi, MD², Lisa Caulley, MSc, MD¹, Mohammad Alshardan, MD², Shaun Kilty, MD¹; ¹Department of Otolaryngology-Head and Neck Surgery, University of Ottawa, Ottawa, Canada, ²Division of Neurosurgery, Department of Surgery, University of Ottawa, Ottawa, Canada

246: ENDOSCOPIC VERSUS NON-ENDOSCOPIC SURGERY FOR RESECTION OF PITUITARY ADENOMAS: A NATIONAL CANCER DATABASE STUDY – Khodayar Goshtasbi, BS¹, Brandom M Lehrich, BS², Arash Abiri, BS¹, Tyler Yasaka, BS², Frank P Hsu, MD, PhD³, Gilbert Cadena, MD³, Edward C Kuan, MD, MBA¹; ¹University of California Irvine Department of Otolaryngology-Head and Neck Surgery, ²University of California Irvine, ³University of California Irvine Department of Neurological Surgery

247: CSF FLOW IMPROVEMENT AFTER CHIARI MALFORMATION TYPE I SURGERY AS A PROGNOSTIC INDICATOR FOR CLINICAL IMPROVEMENT – Luke Mugge, MD¹, Camila Dassi, MD², Thiago Albonette Felicio, MD², Rafael Martinez-Perez, MD², Giuliano Schmidt Bertazzo Silveira, MD², Mostafa Shahein, MD^2,3, Gustavo Guimarães Rangel, MD⁴, Marcus Zachariah, MD, PhD², Douglas Hardesty, MD², Daniel M Prevedello, MD²; ¹The University of Toledo Medical Center, Department of Neurosurgery, ²The Ohio State University Wexner Medical Center, Department of Neurological Surgery, ³Aswan University, Department of Neurological Surgery, Aswan, Egypt, ⁴The Ohio State Wexner Medical Center, Department of Otolaryngology and Head and Neck

248: GIANT SOLITARY FIBROUS TUMOR: CASE SERIES AND EFFECTIVE MANAGEMENT – Mostafa Shahein, MD^1,2, Thomas L Beaumont, MD, PhD³, Bradley A Otto, MD⁴, Ricardo L Carrau, MD⁴, Oliver Adunka, MD⁴, Daniel M Prevedello, MD¹; ¹Department of Neurological Surgery, The Ohio State University, Wexner Medical Center, Columbus, Ohio, ²Department of Neurosurgery, Aswan University, Egypt, ³Department of Neurological Surgery Department. University of California, San Diego, ⁴Department of Otolaryngology–Head and Neck Surgery, The Ohio State University, Wexner Medical Center Columbus, Ohio

249: COCHLEAR IMPLANTATION IN PATIENTS WITH NEUROFIBROMATOSIS TYPE 2 AND OTHER RETROCOCHLEAR PATHOLOGY: A REVIEW OF 32 CASES OVER 25 YEARS – Nicholas L Deep, MD, Evan Patel, BS, William H Shapiro, AuD, Susan B Waltzman, PhD, Daniel Jethanamest, MD, Sean O McMenomey, MD, J. Thomas Roland Jr., MD, David R Friedmann, MD; NYU Langone

250: THE SELECTIVE VESTIBULAR NEURECTOMY FOR INTRACTABLE MéNIèRE’S DISEASE IN THE ERA OF ENDOSCOPY AND INTRAOPERATIVE ADVANCED NEUROMONITORING. – F. Salvinelli¹, F. Greco¹, F. Capuano¹, M. Della Costanza², A. Marini², M. Iacoangeli²; ¹Department of E.N.T. Surgery, Campus Biomedico University, Rome, Italy, ²Department of Neurosurgery, Marche Polytecnic University, Umberto I General Hospital, Ancona, Italy

251: CLINICAL CHARACTERIZATION OF THIN BONE OVERLYING THE SUPERIOR SEMICIRCULAR CANAL – Michelle K Hong, BS, BA¹, Courtney Duong, BS², Isaac Yang, MD², Quinton Gopen, MD³; ¹David Geffen School of Medicine at UCLA, ²Department of Neurosurgery, UCLA, ³Department of Head and Neck Surgery, UCLA

252: A MODEL OF SUCCESS: INCORPORATING 3D-PRINTED MODELS OF SKULL BASE PATHOLOGY FOR SURGICAL APPROACH PLANNING – Lucas P Carlstrom, MD, PhD, Avital Perry, MD, Christopher S Graffeo, MD, Colin L Driscoll, MD, Michael J Link, MD, Jonathan M Morris, MD; Mayo Clinic

253: MRI T2-WEIGHTED COCHLEAR INTENSITY AS A PREDICTOR OF HEARING LOSS WITH VESTIBULAR SCHWANNOMA PATIENTS – Peter Q Luong, BA¹, Claudia I Cabrera, MD, MS², Nirav Patil, MBBS, MPH³, Hammad A Khan, BS¹, Carlito Lagman, MD⁴, Thomas A Ostergard, MD⁴, Gary Huang, MD², Nicholas C Bambikidas, MD⁴, Sarah E Mowry, MD²; ¹Case Western Reserve University School of Medicine, ²Department of Otolaryngology, University Hospitals Cleveland Medical Center, ³University Hospitals Cleveland Medical Center/Case Western Reserve University, ⁴Department of Neurological Surgery, University Hospitals Cleveland Medical Center

254: RETROSIGMOID INTRADURAL SUPRAMEATAL APPROACH (RISA): A SINGLE-CENTER EXPERIENCE WITH 19 CASES. – Minsoo Kim, MD; Samsung Medical Center, Seoul, Korea

255: ASSESSMENT OF VASCULAR CONFIGURATIONS OF THE SUPRACHIAMATIC REGION USING ENDOSCOPIC ENDONASAL CORRIDORS: A CADAVERIC ANATOMICAL STUDY – Hongwei Zhu, MD, PHD^1,2, Amandeep S Ahluwalia³, Ivan El-Sayed , MD^2,4, Adib A Abla, MD^2,5, Roberto Rodriguez Rubio, MD^2,4,5; ¹Department of Neurological Surgery, The First Affiliated Hospital of Xiamen University, Xiamen, China, ²Skull Base & Cerebrovascular Laboratory, UCSF, ³University of Chicago, ⁴Department of Otolaryngology – Head and Neck Surgery, UCSF, ⁵Department of Neurological Surgery, UCSF

256: COMPARATIVE ANALYSIS OF MICROSURGICAL TECHNIQUES FOR THE EXPOSURE OF INTERNAL MAXILLARY ARTERY: A CADAVER STUDY OF A MAJOR DONOR FOR CEREBRAL REVASCULARIZATION – Xiong Li, MD, PhD^1,2, Atakan Orscelik, MD², Ivan H El-Sayed, MD^2,3, Adib A Abla, MD^2,4, Roberto Rodriguez R Rubio, MD^2,3,4; ¹Department of Neurosurgery, Beijing Chao-Yang Hospital, Capital Medical School, Beijing, China, ²Skull Base & Cerebrovascular Laboratory, UCSF, ³Department of Otolaryngology – Head and Neck Surgery, UCSF, ⁴Department of Neurological Surgery, UCSF

257: CRISTA GALLI PNEUMATIZATION: ANATOMICAL VARIATIONS AND CLINICAL CONSIDERATION IN NEUROSURGERY – Osamu Akiyama, MD, PhD, Akihide Kondo, MD, PhD, Hajime Arai, MD, PhD; Juntendo University Department of Neurosurgery

258: THE ROLE OF ENDOSCOPIC CONDYLECTOMY IN ENDONASAL INFERIOR CLIVECTOMY AND EXTENDED FAR MEDIAL APPROACHES: DEMONSTRATION OF STEREOTACTIC CT LANDMARKS IN CADAVERIC DISSECTION WITH CLINICAL CORRELATION. – Giuliano S Bertazzo-Silveira, MD¹, Sunil V Manjila, MD², Rafael Martinez-Perez, PHD¹, Thiago F Albonette, MD¹, Luciano M Prevedello, MD¹, Ricardo L Carrau, MD³, Daniel M Prevedello, MD⁴; ¹The Ohio State University Wexner Medical Center, Department of Neurological Surgery, ²Department of Neurosurgery, McLaren Hospital, Bay Region, Bay City MI, USA, ³The Ohio State University Wexner Medical Center, Department of Otolaryngology and Head and Neck, ⁴Departments of Neurosurgery and Head and Neck Surgery3, Wexner Medical Center, The Ohio State University. Columbus, OH, USA

259: VOLUMETRIC ASSESSMENT OF ENDOSCOPIC ENDONASAL ANTERIOR CLINOIDECTOMY – Pierre-Olivier Champagne, MD, Georgios Zenonos, MD, Eric E Wang, MD, Carl H Snyderman, MD, Paul A Gardner, MD; University of Pittsburgh Medical Center

261: MORPHOMETRIC ANALYSIS OF THE PETROCLIVAL REGION AND THE EFFECTS OF CLIVAL DIMENSIONS ON SURGICAL APPROACH SELECTION. – Zaid Aljuboori, MD, Ahmad Alhourani, MD, Candice Nguyen, BS, Heegok Yeo, BS, Brian Williams, MD, Norberto Andaluz, MD; University of Louisville

262: BONY DEHISCENCE IN THE LATERAL WALL OF THE SPHENOID SINUS: PREVALENCE AND ITS IMPLICATION – Sung-Woo Cho, Kihwan- KihwanHwang, Tae-Bin Won, MD, PhD; Seoul National University Bundang Hospital

263: NASAL CHONDROMESENCHYMAL HAMARTOMA INVOLVING ANTERIOR SKULL BASE – A CASE SERIES IN A PEDIATRIC POPULATION – Gustavo Rangel¹, Erin Hamersley¹, Gregory Wiet², Brad Otto², Rachel Mariani¹, Annie Drapeau¹, Ricardo Carrau², Daniel Prevedello¹, Patrick Walz¹; ¹Nationwide Children’s Hospital – OSU, ²OSU

264: PEDIATRIC ENDONASAL ENDOSCOPIC SKULL BASE SURGERY : AN INSTITUTIONAL EXPERIENCE OF 54 PATIENTS – Cem Meco, Prof, Gokmen Kahilogullari, Assoc Prof, Suha Beton, Assoc Prof, Murat Zaimoglu, Onur Ozgural, Hazan Basak, Melih Bozkurt, Assoc Prof, Agahan Unlu, Prof, Dr; Ankara University

265: SINONASAL SYMPTOM OUTCOMES FOLLOWING ENDOSCOPIC ANTERIOR CRANIAL BASE SURGERY IN THE PEDIATRIC POPULATION – Taylor R Carle, MD, Anthony P Heaney, MD, Harvey K Chiu, MD, Jeffrey D Suh, Marilene B Wang, MD; UCLA

266: JUVENILE NASOPHARYNGEAL ANGIOFIBROMA: A RETROSPECTIVE INSTITUTIONAL SURGICAL CASE SERIES – Salomon Cohen Cohen, MD¹, Michael J Link, MD¹, Jeffrey R Janus, MD², Garret W Choby, MD², Eric J Moore, MD², Jan Kasperbauer, MD², Jamie J Van Gompel, MD¹; ¹Mayo Clinic, Rochester, Department of Neurologic Surgery, ²Mayo Clinic, Rochester, Department of Otorhinolaryngology

267: ANTERIOR SKULL BASE SARCOMAS: REPORT ON CHARACTERISTICS AND OUTCOMES – Sallie Long, MD¹, Panagiotis Asimakopoulos, MBChB², Marlena McGill, BS², Marc A Cohen, MD, MPH², Snehal G Patel, MD², Jatin P Shah, MD², Ian Ganly, MD, PhD²; ¹Department of Otolaryngology Head and Neck Surgery, NewYork-Presbyterian Hospital Columbia and Cornell, ²Department of Surgery, Head and Neck Service, Memorial Sloan Kettering Cancer Center

268: SURGICAL MANAGEMENT OF CLASS C AND D GLOMUS JUGULARE TUMORS: FISCH INFRATEMPORAL FOSSA TYPE A APPROACH – Yin Xia, Yubin Xue, Ting Ye, Xiaopeng Qu, Xukun Yan, Wenyang Zhang; Department of Otorhinolaryngology, Beijing Tiantan Hospital, Capital Medical University

269: CRANIOPHARYNGIOMAS: THE ADVANTAGE OF AN INFRASELLAR APPROACH WITH POSTERIOR CLINOIDECTOMY – Ariel Kaen, MD, PhD¹, Eugenio Cardenas, MD, PhD¹, Edinson Najera, MD¹, Pablo Remon, MD², Ignacio Martin Schrader, MD¹, Alfonso Soto, MD²; ¹Department of Neurological Surgery, Hospital Universitario Virgen del Rocío, Sevilla, Spain, ²Department of Endocrinology and Nutrition, Hospital Universitario Virgen del Rocío, Sevilla, Spain

270: ENDOSCOPIC ENDONASAL SURGERY FOR “INOPERABLE” CRANIOPHARYNGIOMAS: INTRAOPERATIVE CHALLENGES AND MANAGEMENT OF COMPLICATIONS – Juan C Fernandez-Miranda, MD, FACS, Ahmed Moyheldin, MD, PhD, Zara Patel, Jayakar Nayak, Peter Hwang; Stanford University