Superior mesenteric artery syndrome involving the duodenum and jejunum.

Superior mesenteric artery (SMA) syndrome is a rare cause of intestinal obstruction involving the duodenum. Diagnosis is based on clinical suspicion with radiologic confirmation. We report an unusual presentation of the SMA syndrome involving both the duodenum and jejunum initially not recognized on contrast-enhanced CT. This case demonstrates the judicious use of multiple modalities in evaluating for this syndrome.