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Case report
Subcutaneous sacrococcygeal myxopapillary ependymoma misdiagnosed as pilonidal disease
  1. Aisling Kelly1,
  2. Deirdre Nally1,
  3. Stephen Crowther2 and
  4. Dara Kavanagh1
  1. 1Department of Surgery, Tallaght University Hospital, Dublin, Ireland
  2. 2Department of Pathology, Tallaght University Hospital, Dublin, Ireland
  1. Correspondence to Dr Aisling Kelly; aiskelly{at}


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.

  • CNS cancer
  • general surgery
  • pathology
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  • Contributors DK conceived of the presented idea and supervised the project. SC analysed the pathology specimens and provided images of the same. AK and DN wrote the manuscript with input from DK and SC.

  • Funding The authors have not declared a specific grant for this research from any funding agency in the public, commercial or not-for-profit sectors.

  • Competing interests None declared.

  • Patient consent for publication Obtained.

  • Provenance and peer review Not commissioned; externally peer reviewed.

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