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Figure 2a.   Bowel infarct due to mesenteric venous thrombosis in a 52-year-old man. (a) Contrast-enhanced CT scan shows diffuse bowel wall thickening in the jejunum (arrows) and a hypoattenuating thrombus in the SMV (arrowhead). (b) Follow-up CT scan obtained 5 weeks later shows that the thickened bowel wall has become much thinner (arrows). However, at surgery, the involved bowel segment was gangrenous with microperforation.