An uncommon cause of pneumobilia: blunt abdominal trauma.

Pneumobilia is described as occurrence of free air in the gallbladder or biliary tree. There are a number of causes of pneumobilia, including surgically created biliary enteric fistula, instrumentation of the bile duct on endoscopic retrograde cholangiopancreatography, emphysematous cholecystitis, and pyogenic cholangitis. Pneumobilia has also occurred following blunt abdominal trauma, but to date, no more than five cases of such injury have been reported in the literature. In this report, we present a patient struck by a motor vehicle with traumatic pneumobilia following blunt trauma to the abdomen, which was managed conservatively.