Axial section of the contrast-enhanced CT scan image of abdomen and pelvis depicting the compression of third part of the duodenum between the SMA and the abdominal aorta. The proximal part of the duodenum is dilated (White arrow—compressed third part of the duodenum, green arrow—the dilated proximal part, red arrow—abdominal aorta, blue arrow—superior mesenteric artery). SMA, superior mesenteric artery.