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We hypothesized that authors\u2019 medical specialties could be associated with reported findings on the role of adjuvant radiotherapy after GTR of WHO grade 2 meningiomas.<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Method<\/jats:title>\n                <jats:p>A systematic review was conducted in Embase and Medline databases, in addition to screening of all relevant bibliographies. Articles including patients aged 18 years or older, with histologically confirmed WHO grade 2 meningioma, were included. We extracted data on medical subspecialties using the author list. We registered study design, median follow-up, number of included patients, WHO classification in use, and years of study inclusion.<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Results<\/jats:title>\n                <jats:p>Thirty-seven relevant studies were identified, where 34 (92%) were retrospective cohort studies, two studies (5%) were systematic reviews, and one study (3%) was a meta-analysis. If the last author was a radiation-oncologist, the study was more likely to favor adjuvant radiotherapy, and if a neurosurgeon was last author, the study was more likely to not advocate adjuvant radiotherapy (<jats:italic>p<\/jats:italic>=0.009). There was no significant association between study result and whether the study was published in a neurosurgical or oncological journal (<jats:italic>p<\/jats:italic>=0.802). There was no significant difference in follow-up time, years of inclusion, or number of included patients between studies favoring or not favoring adjuvant radiotherapy.<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Conclusions<\/jats:title>\n                <jats:p>In this systematic review of the literature, we found that if a radiation-oncologist was the last author of the study, the study was more likely to favor adjuvant radiotherapy after gross total resection of WHO grade 2 meningioma. Clinicians and researchers should be aware of a possible genealogy bias in the neuro-oncological literature.<\/jats:p>\n              <\/jats:sec>","DOI":"10.1007\/s00701-021-04797-0","type":"journal-article","created":{"date-parts":[[2021,3,29]],"date-time":"2021-03-29T11:02:51Z","timestamp":1617015771000},"page":"2459-2464","update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["The impact of authors\u2019 medical specialty on publication patterns and published results of adjuvant radiotherapy for WHO grade 2 meningiomas\u2014a systematic review"],"prefix":"10.1007","volume":"163","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-9883-3796","authenticated-orcid":false,"given":"Per Sveino","family":"Strand","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ole","family":"Solheim","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"297","published-online":{"date-parts":[[2021,3,29]]},"reference":[{"key":"4797_CR1","doi-asserted-by":"publisher","first-page":"1547","DOI":"10.1093\/neuonc\/nou098","volume":"16","author":"AA Aizer","year":"2014","unstructured":"Aizer AA, Arvold ND, Catalano P, Claus EB, Golby AJ, Johnson MD, Al-Mefty O, Wen PY, Reardon DA, Lee EQ, Nayak L, Rinne ML, Beroukhim R, Weiss SE, Ramkissoon SH, Abedalthagafi M, Santagata S, Dunn IF, Alexander BM (2014) Adjuvant radiation therapy, local recurrence, and the need for salvage therapy in atypical meningioma. 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