Fig. 19
From: Bowel wall thickening at CT: simplifying the diagnosis
White attenuation pattern due to spontaneous intramural bowel wall haemorrhage in a patient with polyarteritis nodosa. Axial unenhanced (a) and contrast-enhanced (b) CT scans of the abdomen show concentric wall thickening of the third duodenal portion that showed spontaneous hyperenhancement of the bowel wall due to spontaneous haemorrhage. Adapted from the electronic poster “Bowel wall thickening—a complex subject made simple” DOI: 10.5444/esgar2011/EE-063