Primary aortoduodenal fistula presenting as an upper gastrointestinal bleed.

A case of primary aortoduodenal fistula, which presented as an upper gastrointestinal bleed, is described, including a brief review of the literature. Since 1952, with the advent of homograft replacement, there has been a significant decrease in the number of reported cases of aortoenteric fistulas of the primary type.