Abstract
This report describes a case of a giant superior mesenteric artery (SMA) aneurysm. A 21-year-old man was admitted to our hospital because of progressive intermittent backache. He was given a diagnosis of a giant aneurysm of the SMA by enhanced computed tomography, with a diameter up to 80 mm. Angiography showed adequate collateral flow from the inferior mesenteric artery to the distal small bowel and the right half of the colon. We extirpated the giant SMA aneurysm as thoroughly as possible, and closed the trunk of SMA with sutures. We resected a small daughter aneurysm and reconstructed one of the major collateral arteries by end-to-end anastomosis. The postoperative course was uneventful without any abdominal complications. Pathological examination of the aneurismal wall proved to be associated with fibromuscular dysplasia (FMD).
