<prompt> In a patient with sponteneous biliary enteric fistula the most common site of communication with gall bladder isDuodenumJejunumIleumTransverse colon  <response>: .BILIARY FISTULAS - Types a. External: Usually occurs as a complication of surgery following-- Gastrectomy. Cholecystectomy open or laparoscopic. CBD surgery. Pancreatic surgery. b. Internal: Cholecysto-duodenal fistula causing gallstone ileus. Cholecysto-enteric fistula. Cholecysto-choledochal fistula. External biliary fistulas are difficult to manage, often dangerous, but many a times resolve spontaneously. ref:SRB;s manual of surgery,ed 3,pg no 593 