Endometriosis with Intestinal Implants Mimicking Rectal Cancer

The case presented involves a thirty-eight year old woman with endometriosis, who was diagnosed by laparoscopic visualization and histopathological confirmation. after one year, and while the patient was on infertility work-up, she referred to a gastroenterologist from the gynecologic clinic because of palpable bulging and nodules discovered in a pelvic exam. colonic involvement was detected by colonoscopy and endosonography. a pathology report of sections of the colonic mucosa revealed deciduosis (endometriosis). this incidence of this type of endometriosis is quite rare, and involves extensive involvement of colonic mucosa. we recommend careful pelvic examination and rectovaginal palpation in endometriosis patients even if they appear asymptomatic for gastrointestinal complications.