Mixed endometrioid and clear cell carcinoma arising from laparoscopic trocar site endometriosis.

Laparoscopic port site endometriosis is less common in abdominal wall endometriosis, and malignant transformation of abdominal wall endometriosis is rare. We reported a case of mixed endometrioid and clear cell carcinoma arising from port site endometriosis. The patient was a 49-year-old woman with a history of laparoscopic excision of ovarian endometrioma. Physical examination revealed a subcutaneous solid tumor around the laparoscopic surgical scar. Imaging showed a suspicious malignancy. She underwent radical marginal resection of the abdominal wall tumor, flap reconstruction of the abdominal wall, hysterectomy, bilateral salpingo-oophorectomy and omental biopsy. Histological examination revealed mixed endometrioid and clear cell carcinoma. Computed tomography scan showed no evidence of recurrence after six cycles of chemotherapy. This is the first case of malignant transformation from laparoscopic trocar site endometriosis.