Gastrointestinal hemorrhage due to fistula from aortic aneurysm. Case report.

Two cases of gastrointestinal bleeding due to aortic aneurysm with fistula to the duodenum are reported. When upper gastrointestinal fiberendoscopy rules out the commonest sources of bleeding but reveals no specific lesion, sonography is advisable. Accurate diagnosis and timely treatment are prerequisites for a successful outcome in this otherwise fatal condition.