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There are various problems associated with the surgical management of concomitant abdominal aortic aneurysm (AAA) and gastrointestinal malignancy. Our surgical strategy for the treatment of concomitant AAA and gastrointestinal malignant diseases, with the exception of colorectal diseases is basically a one-stage operation. This report reviews 6 cases involving concomitant AAA and gastrointestinal malignancy (colon cancer in 3 cases, gastric cancer in 2 and hepatoma in one). In 2 cases involving gastric cancer, we selected a one-stage operation for the coexistent AAA and gastrointestinal malignancy. The postoperative courses were uneventful. In a 69-yearold man with concomitant AAA, hepatoma and ischemic heart disease, a hepatectomy and coronary revascularization preceded AAA repair because the AAA diameter was too small. AAA repair was performed after 4 months when its diameter had been enlarged. In one of the 3 cases involving concomitant AAA and colon cancer, the malignancy was resected first and the patient died of recurrence 7 months after the operation and prior to the operation for AAA. In the second case of colon cancer, AAA repair preceded the resection of the malignancy.A right hemicolectomy was performed 53 days after the AAA operation. The third case had a one-stage operation for coexistent AAA and colon cancer. His postoperative course was uneventful. In this

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