Gallstone ileus of duodenum with huge duodenal stone

Gastrointestinal obstruction by a gallstone is an uncommon but important complication of biliary stone disease whichmostly affects the elderly. the classic triad of radiological features includes pneumobilia, ectopic gallstone and evidenceof intestinal obstruction. terminal ileum is the most common site of obstruction, followed by jejunum and gastricoutlet. we present a case of duodenal gallstone ileus of a large, fluid-density mixed biliary stone with a peripheral rimof hyperdensity (very fine calcification) in ct scan.