title: Polypoid endometrioma of the rectosigmoid.
abstract: Endometriosis of the bowel most often involves the sigmoid and rectosigmoid and appears as an intramural mass protruding into the lumen in a polypoid or constricting fashion. Occasionally there is an intraluminal mass without obvious intramural involvement. Endometriosis of bowel is rarely diagnosed at endoscopic biopsy. We present a patient with an intraluminal endometrioma with a positive endoscopic biopsy.
mesh_terms: D004715:Endometriosis / Q000175:diagnosis* / Q000473:pathology; D005260:Female; D006801:Humans; D007417:Intestinal Polyps / Q000175:diagnosis / Q000473:pathology; D008875:Middle Aged; D012004:Rectal Neoplasms / Q000175:diagnosis* / Q000473:pathology; D012811:Sigmoid Neoplasms / Q000175:diagnosis* / Q000473:pathology; D012812:Sigmoidoscopy