Transverse color US of the upper abdomen in the midline (above) shows the mesenteric vessels swirling around themselves (Whirlpool sign). The superior mesenteric vein was above the superior mesenteric artery. Upper GI exam (below) shows the duodenal jejunal junction to be to the left of the spine but to be lower in position than the duodenal bulb and the proximal jejunum appears to spiral downwards away from it.
Pediatric Imaging 