An Inflammatory Polyp of the Sigmoid Colon Observed in a Case with a Ruptured Ovarian Dermoid Cyst

We present here a rare case, an ovarian dermoid cyst with fistulaformation into the sigmoid colon, which forms an inflammatorypolyp of the sigmoid colon. A 58-year-old woman was admitted because of occasional analbleeding. Several examination disclosed the elevation of erythrocytesedimentation rate, a positive test of stool specimen for occultblood, a polyp of the sigmoid colon in barium enema. Laparotomyshowed that a dermoid cyst of the left ovary had ruptured intothe sigmoid. The etiology of the rupture was "idiopathic." Thefistulous communication between the cyst and the sigmoid colonwas thought to have developed the inflammatory polyp over aperiod of about two years.