We report a case of a 63-years-old woman with a ten years history of increasing abdominal girth with associated abdominal pain. Abdomino-pelvic ultrasound and computed tomography scan revealed a large left ovarian cyst. The patient underwent laparotomy, resection of ovarian cyst and hysterectomy with bilateral ovarian resection. The removed huge mucinous cystadenoma, weighed 27 kg. Her post-operative course was unremarkable.
