[Vomiting, abdominal pain and weight loss with an acquired anatomical cause: superior mesenteric artery syndrome].

Superior mesenteric artery syndrome (SMAS) is a rare and acquired anatomical condition characterized by vomiting, abdominal distension, weight loss and postprandial distress due to compression of the transverse portion of the duodenum between the superior mesenteric artery (SMA) and aorta, which causes duodenal outflow problems. We report a case series of three patients with SMAS. Diagnosis of the syndrome was made by augmenting a high degree of suspicion with repeat gastroscopies, CT scans and hypotonic duodenal contrast series showing compression of the horizontal part of the duodenum located between the vessels specified above.