Aortic erosion by duodenal diverticulum: an unusual aortoenteric fistula

Primary aortoduodenal fistula presenting as a diverticulum of the distal duodenum with GI bleeding may be a difficult diagnostic entity with nondiagnostic endoscopy and angiography. We have described a patient in whom diagnosis was established at laparotomy, with treatment including debridement, repair, and extra-anatomic bypass.