Boy with abdominal distension

Video S1. Abdominal ultrasonography showed stenosis of the duodenal lumen and dilatation of the proximal duodenum. Immediately after the patient changed posture to left decubitus position, the duodenal contents remained stagnant at the compression site. Video S2. A few seconds later, superior mesenteric artery entrapment was relieved, and flow of duodenal contents was observed. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.