Aneurysms of the superior mesenteric artery and its branches are not common. These are boften detected only after rupture. Some are infected or are associated with intramural dissection. An aneurysm close to the origin of the superior mesenteric artery was associated with a tight stenosis of the celiac artery. These aneurysms develop in patients with systemic lupus erythematosus. Superior mesenteric artery branch aneurysm embolization using small coils is occasionally performed.
This is radiology images of the Superior mesenteric artery aneurysm in a patient with systemic lupus erythematosus. A: Contrast-enhanced CT identifies a mesenteric aneurysm containing an enhancing lumen (arrow), mural thrombus, and calcified rim. B: Longitudinal US reveals the aneurysm continuous with the superior mesenteric artery (arrows). C: T1-weighted MR image shows similar findings, including a hypointense lumen (arrow). D: Selective angiogram outlines the superior mesenteric artery, aneurysm (arrows) and arteries arising from the aneurysm.