Figure 4.

Reperfusive damage from still available superior mesenteric artery in a patient with inferior mesenteric artery occlusion. In the acute phase (Day 1), (a) it appears as thickening of the large bowel wall on multidetector CT with consequent lumen calibre reduction and the typical feature of “little rose” sign (arrow). Shaggy contour of the involved intestine and misty mesentery is associated with the pericolic fluid (arrowhead). In the subacute phase (Day 3), (b) thanks to an effective reperfusion large bowel wall thickening decrease with progressive gaping of lumen (white arrow) while pericolic fluid decreases (arrowhead). The patient underwent new CT in the chronic phase, (c) showing fibrotic reaction that led to continuous mild and irregular circumferential thickening with gaping lumen (arrow).