Question: A 39-year-old Hispanic man with a 7-year history of intermittent left lower quadrant abdominal pain and hematochezia. He is otherwise healthy. On several computed tomography (CT) scans, there were diffuse colonic diverticula. During acute attacks, inflammatory changes were noted within the pelvis adjacent to a large, inflamed, sigmoid diverticulum. These finings were consistent with acute sigmoid diverticulitis. He was treated with antibiotics. During colonoscopy, there was significant sigmoid luminal narrowing with near circumferential erythematous and bluish mucosa (Figure A and Video Clip) at 35 cm from the anal verge. This discolored mucosal segment was actually the base of several elongated and pedunculated polyps (Figure B). The pedicles of these polyps were hyperemic and adenomatous tissue was not observed. One of these pedunculated polyps was removed through snare polypectomy uneventfully. What is the diagnosis?
PREVIEW00162-0/journalimage?img=PIIS0016508509001620.gr1.lrg.gif&fig=fig1&kwhquery=&issn=0016-5085&ishighres=false&allhighres=false&free=no','journalimage');)
