Secondary aortoenteric fistulas (AEFs) and aortic graft infection are relatively rare but fatal complications of aortic surgery. A 77-year-old man had a 1-week history of fever and abdominal pain with right inguinal area swelling. The patient's medical history included hypertension, aortobifemoral bypass grafting due to right iliac artery, and superficial femoral artery occlusion. Abdominopelvic computed tomography revealed the presence of an aortic graft in the hollow viscus. Although there have been several reports of secondary AEF, there have been few reports of an aortic graft in a hollow viscus. Diagnosis of AEF can be delayed in patients with atypical symptoms. Without a high index of suspicion, this condition has fatal consequences.