Intestinal Endometriosis Leading to Recurrent Hematochezia

Endometriosis occurs when endometrial tissue existing outside of the endometrial cavity has an inflammatory response, which can lead to swelling and scarring, generally in the abdominopelvic cavity. It commonly presents in reproductive-age women and very infrequently presents in postmenopausal women. We report a case of a 51-year-old woman who underwent a hysterectomy a decade before presentation with new-onset intermittent proctalgia and hematochezia. Her colonoscopy showed a sigmoid polyp, which was confirmed to be endometriosis on histopathology. This case highlights intestinal endometriosis as a rare differential to be considered in women, regardless of age, with abnormal rectal bleeding.