Wong T H, Khoo A K, Tan P H, Ong B H
Department of Plastic Surgery, Singapore General Hospital, 1 Hospital Drive, Singapore 169608.
Ann Acad Med Singap. 2000 Nov;29(6):757-9.
Cutaneous epidermal cysts are common lesions, but fortunately, malignant transformation of their epithelium is rare. There are only a few cases mentioned in recent literature, mostly occurring in epidermal cysts in the head and neck region.
We present a case of malignant transformation in a long-standing buttock epidermal cyst, presenting a month after trauma to the cyst.
An excision biopsy and rotation flap was done. When the pathology was confirmed, a second resection was carried out and the defect covered with a free latissimus dorsi flap, a buttock rotation flap and a posterior thigh rotation flap.
Although malignant transformation is rare, this case illustrates the importance of routine histology in excision of epidermal cysts.
皮肤表皮囊肿是常见病变，但幸运的是，其上皮发生恶性转化的情况罕见。近期文献中仅提及少数病例，大多发生在头颈部的表皮囊肿。
我们报告一例长期存在的臀部表皮囊肿发生恶性转化的病例，囊肿外伤后一个月出现症状。
进行了切除活检及旋转皮瓣手术。病理确诊后，再次进行切除，并采用背阔肌游离皮瓣、臀部旋转皮瓣和大腿后侧旋转皮瓣覆盖缺损。
尽管恶性转化罕见，但该病例说明了表皮囊肿切除术中常规组织学检查的重要性。
