There is a large mesenteric arteriovenous malformation arising from the superior mesenteric artery with a large nidus and multiple draining veins. The dominant draining vein terminates at the portal confluence. There are multiple jejunal and ileal arterial feeders. Mesenteric edema and trace ascites are associated with the malformation. Prominent wall thickening and relative hypoenhancement of the distal ileum and proximal colon is likely ischemic secondary to steal phenomenon. Subsequent arteriogram confirmed these findings, and demonstrated no supply from the celiac axis or inferior mesenteric artery.