A Patient with Hematochezia and Intestinal Obstruction

levels (75.10 U/mL). Sigmoidoscopy was performed, showing a polypoid, fungating mass with colonic obstruction in the rectum, located 11 cm from the anal verge (Fig. A). Chronic inflammation with ulceration and epithelial hyperplasia were observed in the mucosal layer of endoscopic biopsies. A CT scan of the abdomen and pelvis revealed an illdefined enhancing lesion in the rectum, abutting the uterus (Fig. B). Strong fluorodeoxyglucose uptake in the rectum was noted on PET-CT scanning (Fig. C). Further analysis by T2W sagittal imaging and MRI confirmed the presence of a fungating rectal mass that was infiltrating the uterus (Fig. D). Although the presence of cancer was not confirmed in colonoscopic biopsies, we decided to operate based on clinical suspicions of invasive rectal malignancy and colonic obA Patient with Hematochezia and Intestinal Obstruction