Aortoduodenal fistula

The CT scan comes from a 75-year-old patient with a history of AAA repair who presented with massive lower gastrointestinal bleeding and hypotension. An aortoduodenal fistula is demonstrated by a CT scan, which shows a break in the wall of the aorta (arrow) and high-density hematoma (arrowhead). In (B), air can be seen tracking between the duodenum and the aorta (arrow).