Gousias, KKGousiasHoyer, AAHoyerMazurczyk, L AL AMazurczykBartek, JJBartekBruneau, MMBruneauCeltikci, EECeltikciForoglou, NNForoglouFreyschlag, CCFreyschlagGrossman, RRGrossmanJungk, CCJungkMetellus, PPMetellusNetuka, DDNetukaRola, RRRolaSchucht, PhilippePhilippeSchuchtSenft, CCSenftSignorelli, FFSignorelliVincent, A J P EA J P EVincentSimon, MMSimon2024-10-262024-10-262024https://boris-portal.unibe.ch/handle/20.500.12422/177938INTRODUCTION Technical advances and the increasing role of interdisciplinary decision-making may warrant formal definitions of expertise in surgical neuro-oncology. RESEARCH QUESTION The EANS Neuro-oncology Section felt that a survey detailing the European neurosurgical perspective on the concept of expertise in surgical neuro-oncology might be helpful. MATERIAL AND METHODS The EANS Neuro-oncology Section panel developed an online survey asking questions regarding criteria for expertise in neuro-oncological surgery and sent it to all individual EANS members. RESULTS Our questionnaire was completed by 251 respondents (consultants: 80.1%) from 42 countries. 67.7% would accept a lifetime caseload of >200 cases and 86.7% an annual caseload of >50 as evidence of neuro-oncological surgical expertise. A majority felt that surgeons who do not treat children (56.2%), do not have experience with spinal fusion (78.1%) or peripheral nerve tumors (71.7%) may still be considered experts. Majorities believed that expertise requires the use of skull-base approaches (85.8%), intraoperative monitoring (83.4%), awake craniotomies (77.3%), and neuro-endoscopy (75.5%) as well as continuing education of at least 1/year (100.0%), a research background (80.0%) and teaching activities (78.7%), and formal interdisciplinary collaborations (e.g., tumor board: 93.0%). Academic vs. non-academic affiliation, career position, years of neurosurgical experience, country of practice, and primary clinical interest had a minor influence on the respondents' opinions. DISCUSSION AND CONCLUSION Opinions among neurosurgeons regarding the characteristics and features of expertise in neuro-oncology vary surprisingly little. Large majorities favoring certain thresholds and qualitative criteria suggest a consensus definition might be possible.enCNS tumors EANS Expertise Surgical neuro-oncology600 - Technology::610 - Medicine & healtharticle10.48350/1975533883193510.1016/j.bas.2024.102822