<prompt> Most common site of gall stone impaction in Cholecysto Intestinal fistula isDJ junctionProximal to ileo-cecal junctionDistal to ileo-cecal junctionColon  <response>: Ans. b Proximal to ileo cecal junctionRef: Sabiston 20th edition Page 1506Gallstone ileus: MC site of obstruction is terminal ileum Intermittent obstruction is seen Pneumobilia is seen 10 have multiple stones in small intestine 