Fig. 17
From: Imaging the postoperative patient: long-term complications of gastrointestinal surgery
a, b Patient with complete lower intestinal obstruction who had undergone anterior resection of the rectum some years earlier. Water-soluble enema showed no progression of contrast beyond the coloanal anastomosis (arrow in a). Pelvic CT revealed diffuse wall thickening (arrows in b) of the coloanal anastomosis (note the surgical staples) due to a histologically proven fibrotic stenosis