Rectus abdominal muscle endometriosis in a patient with cesarian scar: case report.

Endometriosis is the existence of endometrial tissue out of the intrauterine cavity. Abdominal wall endometrioma is a well-defined mass composed of endometrial glands and stroma that may develop after gynecologic and obstetrical surgeries. A cyclic painful mass at the site of a cesarean section scar is most likely due to an endometrioma, and wide local excision is the advisable treatment. The authors present a case of endometrioma in the abdominal wall, which was treated with local excision.