Two cases of aorto-gastrointestinal fistula

We report two cases of aorto-gastrointestinal fistula. Case 1, a 60-year-ol d man, suffered from repeat hematemesis. He was preoperatively diagnosed as aortoesophageal fistula with thoracic aortic aneurysm and was successfully treated by graft replacement of the aneurysm. Case 2, a 73-year-old man, p resented with massive gastrointestinal bleeding, yet repeat endoscopical ex amination did not reveal the origin of the bleeding. He died of catastrophi c hematochezia. The pathological findings at autopsy revealed an aortoduode nal fistula. These two cases suggested the importance to consider an aorto- gastrointestinal fistula in the differential diagnosis of patients presenti ng gastrointestinal hemorrhage.