Figure 10. Drawings illustrate the stages of intestinal rotation. In A, the duodenum has rotated 90° counterclockwise to lie to the right of the superior mesenteric artery. The distal large bowel also rotates 90° counterclockwise. In B, the duodenum has rotated another 90° counterclockwise. In C, the duodenum has rotated its final 90° counterclockwise with the duodenojejunal flexure lying to the left of the midline. The cecum continues to rotate. In D, the normally rotated bowel is depicted. (Reprinted, with permission, from reference 1.)