Large epidermal cyst involving the ischiorectal fossa: MR demonstration

Hajime Fujimoto, Koji Murakami, Akio Kashimada, Masami Terauchi, Kosuke Ozawa, Kenji Nosaka, Noboru Arimizu

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23 Citations (Scopus)


A large subcutaneous mass was noted in the buttock of a 79-year-old man. Computed tomography (CT) and magnetic resonance imaging (MRI) showed a thinwalled cystic mass that involved the ischiorectal fossa. The content appeared hyperintense on T1-weighted images. T2-weighted images demonstrated a considerable amount of debris. At surgery an epidermal cyst with markedly keratinized squamous epithelium was found. It contained much keratin and cholesterin.

Original languageEnglish
Pages (from-to)146-148
Number of pages3
JournalClinical Imaging
Issue number2
Publication statusPublished - 1993 Jan 1


  • Epidermal cyst
  • Ischio-rectal fossa
  • Magnetic resonance imaging

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging

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    Fujimoto, H., Murakami, K., Kashimada, A., Terauchi, M., Ozawa, K., Nosaka, K., & Arimizu, N. (1993). Large epidermal cyst involving the ischiorectal fossa: MR demonstration. Clinical Imaging, 17(2), 146-148.