Fig. 3

A The yellow arrow in the axial plane of computed tomography angiography indicates superior mesenteric artery, which continues its course to branches to supply small bowel. B Conventional angiography. Huge aneurysm originating from posterior and inferior surface of the proximal of superior mesenteric artery is seen in the lateral view of the superior mesenteric artery angiogram. The margin of this aneurysm is shown by the black dashed line. Short black arrows indicate the superior mesenteric artery itself, which is continuously branched in front of this aneurysm. A long black arrow indicates the right hepatic artery originating from superior mesenteric artery. C, D Reconstructed volume rendering images. White arrowheads point to three aneurysms, and short white arrows indicate superior mesenteric artery and its branches. Long white arrow indicates the right hepatic artery originating from superior mesenteric artery. Solid red arrows indicate anterior pancreaticoduodenal artery’s course which originates superiorly from gasrtoduodenal artery and is connected inferiorly to the huge aneurysm. A solid black arrow indicates the celiac trunk. The dotted circle shows obvous narrowing of the origin of the celiac trunk