Ovarian remnant with bilateral duplicate ureters.

A 27-year-old woman had a history of acute chronic pelvic pain. She had had a previous salpingo-oophorectomy for an endometrioma. A computerized tomographic scan showed a left adnexal mass. She was known to have bilateral duplicate ureters shown on intravenous pyelogram. She underwent laparoscopy and retroperitoneal dissection of endometriosis with excision of the mass from the pelvic sidewall. The final pathology was consistent with a hemorrhagic corpus luteal cyst.