Extraluminal air bubble on computed tomography.

We present two cases of gastrointestinal perforation associated with a tiny extraluminal air bubble on computed tomography (CT). The air bubble was located at the round ligament of the liver in a patient of perforated duodenal ulcer and at the intraperitoneal space adjacent to the perforated site of the anterior gastric wall in the other patient. A small amount of fluid was also seen at the round ligament in the second patient. The region of the round ligament of the liver should be carefully scrutinized for the presence of extraluminal air or fluid in patients with acute abdominal symptomatology.