Ultrasound identification of traumatic pneumobilia.

A 65-year-old woman presented to the emergency department with low back pain after being hit by a truck at low speed. Although her abdominal examination showed benign results, an extended Focused Assessment With Sonography in Trauma ultrasound examination was performed and incidentally demonstrated evidence of pneumobilia. There were no additional intra-abdominal injuries noted. Subsequent computed tomography and magnetic resonance cholangiopancreatography confirmed these findings. The etiology of traumatic pneumobilia is discussed with a brief review of the literature on the subject.