Figure 1.

(A) Coronal maximum intensity projection CT angiography image shows arteriovenous malformation originating from inferior mesenteric artery (arrow). (B) Axial CT image shows multiple abnormal vascular structures around to inferior mesenteric artery (black arrow) and marked thickening of colonic wall segments (white arrows). Frontal (C) and lateral (D) views of coloured three-dimensional volume rendered CT angiography images show arteriovenous malformation nidus (black arrow) of inferior mesenteric artery (IMA) (C and D) and severe stenosis of orifice of the IMA (white arrow).