MDCT Angiography of Middle Mesenteric Artery with Associated Bowel Nonrotation Complicating Management of Abdominal Aortic Aneurysm

Abstract

WEB This is a Web exclusive article. middle mesenteric artery is a very rare mesenteric arterial anomaly resulting from incomplete regression of the primitive paired segmental ventral arteries of the dorsal abdominal aorta which supply variable amounts of the small and large bowel [1–8]. We report the imaging findings of a middle mesenteric artery with associated bowel nonrotation in a patient undergoing preoperative MDCT angiography for a known abdominal aortic aneurysm (AAA). The patient was subsequently excluded from aortic stent-graft repair because the middle mesenteric artery was originating from the proximal aspect of the AAA, which, to our knowledge, has not previously been reported. In addition, findings of a middle mesenteric artery with associated bowel nonrotation on MDCT angiography examination have not been previously reported in the literature.