Introduction. Aortoenteric fistula is a communication between the aorta and
segments of the gastrointestinal tract. Primary aortoduodenal fistula is an
extremely rare cause of gastrointestinal bleeding associated with a high
mortality rate. Case Report. We report a case of a 63-year-old man admitted
due to abdominal pain lasting for a week. Abdominal ultrasound and computed
tomography angiography revealed an aortoduodenal fistula without an aortic
aneurysm. Conclusion. This case is an example of a rare cause of
gastrointestinal bleeding, as well as presentation of aortoduodenal fistula
that was not caused by an abdominal aortic aneurysm.
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