Aortocolic fistula: a rare cause of profuse rectal bleeding.

A 62-year-old man with multiple myeloma survived for 19 months following massive hemorrhage from an aortocolic fistula secondary to an aortoiliac aneurysm that was adherent to the sigmoid colon. The literature indicates that early death from multisystem failure is to be expected and that sepsis is an inevitable consequence of aortocolic fistula. However, in this case the patient did not die despite multisystem complications and his eventual death was unrelated to sepsis or graft complications. Reasons for the unexpected outcome are suggested. No survivors have been reported in the literature.