Fig. 21

Coronal (a) and axial (b) contrast-enhanced CT of the abdomen demonstrating multiple dilated loops of small bowel. There is a 3-cm peripherally hyperattenuating obstructing gallstone in the left flank (arrow 1). There is an extensive inflammatory process in the gallbladder bed with air in the gallbladder (arrow 2) consistent with a cholecystoenteric fistula. Appearances are consistent with a bowel obstruction secondary to a gallstone ileus