Abstract
The superior mesenteric artery syndrome is rare, especially in children. Recently, we experienced a premature infant with this syndrome. A two-day old premature female infant weighting 1, 625 g presented with vomiting. Duodenal obstruction due to the superior mesenteric artery was diagnosed. The baby was cured by mobilization of the duodenum and jejunum. This is the first case of this syndrome diagnosed in Japan in a premature infant, so far.