{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,8,28]],"date-time":"2025-08-28T05:40:16Z","timestamp":1756359616797,"version":"3.44.0"},"reference-count":17,"publisher":"BMJ","issue":"1","content-domain":{"domain":["bmj.com"],"crossmark-restriction":true},"short-container-title":["BMJ Case Rep"],"accepted":{"date-parts":[[2019,12,20]]},"published-print":{"date-parts":[[2020,1]]},"abstract":"<jats:p>Ependymomas are neoplasms which arise from the radial glial cells, which many recent studies have proposed are neural stem cells. Extracranial ependymomas are rare. We present the case report and supporting multimedia of a 37-year-old man who presented with a painless intergluteal swelling which was diagnosed clinically as a pilonidal cyst. However, on excision, he was found to have a subcutaneous sacrococcygeal myxopapillary ependymoma based on histological findings. His management and follow-up are presented and discussed. Given the rare nature of this condition, there is a lack of published guidelines on management and follow-up protocols. Supporting evidence is limited to sporadic case reports. This case highlights the diagnostic challenges and management strategies adopted supported by the best available evidence.<\/jats:p>","DOI":"10.1136\/bcr-2019-231639","type":"journal-article","created":{"date-parts":[[2020,1,3]],"date-time":"2020-01-03T05:45:12Z","timestamp":1578030312000},"page":"e231639","update-policy":"https:\/\/doi.org\/10.1136\/crossmarkpolicy","source":"Crossref","is-referenced-by-count":6,"title":["Subcutaneous sacrococcygeal myxopapillary ependymoma misdiagnosed as pilonidal disease"],"prefix":"10.1136","volume":"13","author":[{"given":"Aisling","family":"Kelly","sequence":"first","affiliation":[{"name":"Department of Surgery, Tallaght University Hospital, Dublin, Ireland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Deirdre","family":"Nally","sequence":"additional","affiliation":[{"name":"Department of Surgery, Tallaght University Hospital, Dublin, Ireland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Stephen","family":"Crowther","sequence":"additional","affiliation":[{"name":"Department of Pathology, Tallaght University Hospital, Dublin, Ireland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Dara","family":"Kavanagh","sequence":"additional","affiliation":[{"name":"Department of Surgery, Tallaght University Hospital, Dublin, Ireland"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"239","published-online":{"date-parts":[[2020,1,2]]},"reference":[{"key":"2025082722162657000_13.1.e231639.1","doi-asserted-by":"crossref","first-page":"277","DOI":"10.12688\/f1000research.12684.1","article-title":"Radial glial cells in the adult dentate gyrus: what are they and where do they come from?","volume":"7","author":"Berg","year":"2018","journal-title":"F1000Res"},{"key":"2025082722162657000_13.1.e231639.2","doi-asserted-by":"publisher","DOI":"10.1002\/cncr.21111"},{"key":"2025082722162657000_13.1.e231639.3","doi-asserted-by":"crossref","DOI":"10.1093\/jscr\/rjw121","article-title":"Extradural sacrococcygeal subcutaneous ependymoma misdiagnosed as pilonidal disease: case report and review of the literature","volume":"2016","author":"McEachron","year":"2016","journal-title":"J Surg Case Rep"},{"key":"2025082722162657000_13.1.e231639.4","article-title":"[Subcutaneous myxopapillary ependymoma]","volume":"177","author":"Bj\u00f8rn","year":"2015","journal-title":"Ugeskr Laeger"},{"key":"2025082722162657000_13.1.e231639.5","doi-asserted-by":"publisher","DOI":"10.3171\/jns.1979.51.3.0383"},{"key":"2025082722162657000_13.1.e231639.6","first-page":"1","article-title":"Three gliomata of ependymal origin; two in the fourth ventricle, one subcutaneous over the coccyx","volume":"8","author":"Mallory","year":"1902","journal-title":"J Med Res"},{"key":"2025082722162657000_13.1.e231639.7","doi-asserted-by":"publisher","DOI":"10.1016\/S0022-3468(99)90020-9"},{"key":"2025082722162657000_13.1.e231639.8","doi-asserted-by":"publisher","DOI":"10.1259\/bjr\/61959899"},{"key":"2025082722162657000_13.1.e231639.9","doi-asserted-by":"crossref","first-page":"262","DOI":"10.5144\/0256-4947.2014.262","article-title":"Myxopapillary ependymoma masquerading as subcutaneous saccroccygeal non-healing ulcer: case report","volume":"34","author":"Zaidi","year":"2014","journal-title":"Ann Saudi Med"},{"key":"2025082722162657000_13.1.e231639.10","doi-asserted-by":"crossref","first-page":"218","DOI":"10.4103\/1817-1745.106485","article-title":"Sacrococcygeal myxopapillary ependymoma with anaplastic ependymoma component in an infant","volume":"7","author":"Chakraborti","year":"2012","journal-title":"J Pediatr Neurosci"},{"key":"2025082722162657000_13.1.e231639.11","doi-asserted-by":"publisher","DOI":"10.1007\/s00401-006-0179-0"},{"key":"2025082722162657000_13.1.e231639.12","doi-asserted-by":"crossref","first-page":"70","DOI":"10.14791\/btrt.2017.5.2.70","article-title":"Ependymomas: prognostic factors and outcome analysis in a retrospective series of 33 patients","volume":"5","author":"Chai","year":"2017","journal-title":"Brain Tumor Res Treat"},{"key":"2025082722162657000_13.1.e231639.13","unstructured":"Nabors LB , Portnow J , Ammirati M , et al . NCCN guidelines version 2.2018 central nervous system cancers. National Comprehensive Cancer Network 2018."},{"key":"2025082722162657000_13.1.e231639.14","doi-asserted-by":"publisher","DOI":"10.1016\/S0022-3468(87)80638-3"},{"key":"2025082722162657000_13.1.e231639.15","doi-asserted-by":"publisher","DOI":"10.1002\/(SICI)1097-0339(199609)15:3<228::AID-DC10>3.0.CO;2-I"},{"key":"2025082722162657000_13.1.e231639.16","doi-asserted-by":"crossref","first-page":"50","DOI":"10.1055\/s-0035-1567878","article-title":"Spinal metastasis from subcutaneous sacrococcygeal ependymoma: a case report with long-term follow-up","volume":"1","author":"Yoshioka","year":"2015","journal-title":"Surg J"},{"key":"2025082722162657000_13.1.e231639.17","unstructured":"Maiorana AFR , Fano RA . Myxopapillary ependymoma of the sacrococygeal region. Pathologica 1989:471\u20136."}],"container-title":["BMJ Case Reports"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/syndication.highwire.org\/content\/doi\/10.1136\/bcr-2019-231639","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,8,28]],"date-time":"2025-08-28T05:16:34Z","timestamp":1756358194000},"score":1,"resource":{"primary":{"URL":"https:\/\/casereports.bmj.com\/lookup\/doi\/10.1136\/bcr-2019-231639"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2020,1]]},"references-count":17,"journal-issue":{"issue":"1","published-online":{"date-parts":[[2020,1,2]]},"published-print":{"date-parts":[[2020,1]]}},"alternative-id":["10.1136\/bcr-2019-231639"],"URL":"https:\/\/doi.org\/10.1136\/bcr-2019-231639","relation":{},"ISSN":["1757-790X"],"issn-type":[{"type":"electronic","value":"1757-790X"}],"subject":[],"published":{"date-parts":[[2020,1]]}}}