Ovarian Mature Cystic Teratoma Perforating the Rectum: A Case Report

Abstract

A 48-year-old woman was admitted to our hospital with hematochezia. Abdominal enhanced CT showed a right ovarian cystic teratoma penetrating the rectum. Colonoscopy revealed penetration of the rectum by the ovarian teratoma, and elective operation was performed. Bilateral salpingo-oophorectomy, total abdominal hysterectomy and low anterior resection were performed en bloc. Intraoperative frozen section examination showed a mature cystic teratoma. Mature cystic teratoma penetrating the rectum is rare. Intraoperative frozen-section diagnosis is necessary, because the extent of surgery depends on whether the lesion is benign or malignant.