Fig. 2

Transanal double-balloon enteroscopy revealing bifurcation of the intestinal tract (a). In one lumen seen at the bottom of the screen, there was a polypoid lesion inside of the diverticulum (b, arrow) and ulceration (b, arrowhead). A small bowel series also showed a polypoid lesion inside of the diverticulum at a site approximately 50 cm from the ileocecal valve (c, arrow)