To describe a case of suprapubic dermoid cyst that had been mistaken for cutaneous endometriosis.Case report.Department of Obstetrics and Gynecology, Seoul National University Hospital, Korea.A 22-year-old woman with a 5-year history of a slowly growing suprapubic mass, which had begun to bleed intermittently 6 months before presentation.Complete excision of the suprapubic mass and primary closure of the wound.The natural course of the suprapubic dermoid cyst and histologic findings.The excised suprapubic mass was histologically diagnosed as a dermoid cyst.Subcutaneous dermoid cysts should be part of the differential diagnosis of suprapubic wall masses.