Houdek Matthew T, Warneke James A, Pollard Claire M, Lindgren Elizabeth A, Taljanovic Mihra S
Radiol Case Rep. 2015 Nov 6;5(4):476. doi: 10.2484/rcr.v5i4.476. eCollection 2010.
Epidermal cysts are common, benign, intradermal or subcutaneous, typically asymptomatic masses, ranging from 1 to 4 cm in size. They may occur anywhere in the body, with a predilection for the face, neck, and trunk. Transformation to squamous-cell carcinoma is rare. We present a case of a 61-year-old male patient with a large, growing mass in his posterior left gluteal region. Given the concern for a malignancy, he was referred to a surgical oncologist. Magnetic resonance imaging (MRI) without contrast was performed due to poor renal function and revealed a large cystic mass in the left gluteal subcutaneous soft tissues that was subsequently excised. Pathological examination revealed an epidermal inclusion cyst that measured 17.8 × 13.18 × 5.8 cm. To our knowledge, this is the largest epidermal inclusion cyst reported in the English literature.
表皮囊肿很常见，是良性的皮内或皮下肿物，通常无症状，大小从1至4厘米不等。它们可发生于身体的任何部位，好发于面部、颈部和躯干。转变为鳞状细胞癌很罕见。我们报告一例61岁男性患者，其左臀后部有一个不断增大的肿物。鉴于担心是恶性肿瘤，他被转诊至外科肿瘤学家处。由于肾功能不佳，未进行增强磁共振成像（MRI），结果显示左臀皮下软组织有一个大的囊性肿物，随后将其切除。病理检查显示为一个大小为17.8×13.18×5.8厘米的表皮样囊肿。据我们所知，这是英文文献中报道的最大的表皮样囊肿。
