case_images: PMC3275446_01
case_images: Abdominal X-ray showed distension sign of the stomach with air fluid level and duodenal gas.
case_images: 1752-1947-6-14-1.jpg
case_images: PMC3275446_01_1752-1947-6-14-1.jpg
case_images: F1
case_images: Plain abdominal X-ray showed a distended stomach and duodenal gas (Figure 1).
case_images: Abdominal computed tomography. Abdominal computed tomography showed distension of the stomach and the duodenal bulb due to compression of the third portion of duodenum. The distance between the abdominal aorta and superior mesenteric artery was 6.1 mm (A). The angle between the abdominal aorta and superior mesenteric artery was 15.8  (B). AAo, abdominal aorta; D, duodenum; SMA, superior mesenteric artery.
case_images: 1752-1947-6-14-2.jpg
case_images: PMC3275446_01_1752-1947-6-14-2.jpg
case_images: F2
case_images: Contrast-enhanced abdominal computed tomography (CT) showed a distended stomach and duodenal bulb due to compression of the third portion of the duodenum, an aortomesenteric distance of 6.1 mm (normal: 10 to 28 mm) and a reduction of the aortomesenteric angle to 15.8  (normal: 25  to 60 ) (Figure 2).
case_images: Upper gastrointestinal series. Upper gastrointestinal series in the supine position showed an abrupt cut-off (arrows) at the third portion of the duodenum (A). In the prone position, the contrast medium passed through the obstructed part (arrows) of the distal side (arrowheads) (B).
case_images: 1752-1947-6-14-3.jpg
case_images: PMC3275446_01_1752-1947-6-14-3.jpg
case_images: F3
case_images: An upper gastrointestinal series in the supine position showed a sharp cut-off at the third portion of the duodenum (Figure 3A). In the prone position, the contrast medium passed through the obstructed part of the distal side of the third portion of duodenum (Figure 3B).