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Large epidermal cyst involving the ischiorectal fossa: MR demonstration
H Fujimoto1, K Murakami, A Kashimada
1Department of Radiology, Numazu City Hospital, Japan.
Clinical Imaging
|April 1, 1993
Abstract:
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 thin-walled 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.