Fig. 1.

Contrast-enhanced CT images on admission. a Superior mesenteric artery (white arrow) showing luminal stenosis and concentric intramural hematoma without extravasation. b A small intimal flap (white arrow) can be seen inside the SMA just proximal to the intramural hematoma. c CT angiograph showing two lesions (asterisks) with segmental dilatation proximal to the SMA aneurysm. A blind-sac aneurysm (black arrow) can also be seen. At this point, SMA blood flow distal (S) to the aneurysm is preserved