Primary aortosigmoid fistula treated by descending thoracic aortofemoral bypass

Primary aortoenteric fistula is a rare disease with a fatal outcome unless it is diagnosed accurately and treated surgically. We present an elderly pa tient with primary aortosigmoid fistula confirmed by endoscopy. Descending thoracic aortofemoral bypass was performed and the aortoiliac aneurysm and sigmoid colon were then resected in continuity. The patient maintains a goo d quality of life 6 years after the operation with good graft patency and n o sign of graft infection.