Fig. 5. Abnormal mesenteric vessels. A–D: Blunt mesenteric hematoma, colonic ischemia, and perforation in a 28-year-old man. Coronal-reformatted maximal intensity projection computed tomography images on days 1 (A), 3 (B), 5 (C), and 8 (D) following trauma demonstrate progressive abnormalities of the sigmoid artery from beaded appearance (arrowheads) to complete arterial cutoff (arrows), and increased size of hematoma (h) of the descendosigmoid colonic mesentery. Ischemic hemorrhagic colitis with gangrene and perforation was observed during laparotomy.