Inferior Mesenteric Arteriovenous Fistula Successfully Treated with Surgical Resection: A Case Report.

Idiopathic inferior mesenteric arteriovenous fistula is an extremely rare pathology, and symptoms vary greatly depending on the shunt flow volume through the fistula. We report a case of idiopathic inferior mesenteric arteriovenous fistula in a 63-year-old man who presented with a pulsating sensation in the upper abdomen. Computed tomography revealed an inferior mesenteric arteriovenous fistula with aneurysmal dilatation and a drainage vein into the dilated marginal vein of the descending colon. Surgical resection and ligation of the fistula were successfully performed, and the postoperative course was uneventful. The patient's symptoms resolved, and no recurrence was observed during the 5-year follow-up.