A Case of Cutaneous Endometriosis Combined with Epidermal Cyst in the Cesarean Section Scar

Endometriosis is the abnormal growth of endometrial glands and stroma outside the uterine cavity. Cutaneous endometriosis is a very rare form of extrapelvic endometriosis, and this most commonly occurs at the site of a previous abdominal or pelvic procedure such as hysterectomy, laparoscopy, episiotomy and cesarean section. The classic symptom is a painful nodule that becomes bigger and tenderer during menstruation. Because cutaneous endometriosis is unfamiliar to dermatologists, it can be easily misdiagnosed as other skin tumors. We present here a case of cutaneous endometriosis combined with epidermal cyst, and this developed in the cesarean section scar of a 28-year-old woman.