Figure 7b. Mucosal enhancement. (a) Coronal unenhanced CT scan shows multiple colonic diverticuli without any hyperattenuating material within the bowel. (b) CT angiogram demonstrates diffuse mucosal enhancement throughout the descending colon (arrowheads), within the stomach (large arrow), and in portions of the small bowel. Such a finding can mimic acute hemorrhage, but the contracted appearance of the bowel, the striated peripheral enhancement pattern (small arrows), and the diffuse multifocal appearance support the correct diagnosis of mucosal enhancement. (c, d) Unenhanced CT scan (c) and CT angiogram (d) demonstrate the typical striated appearance of mucosal enhancement within the stomach.