Figure 21c. Case 7. (a) CT scan of the abdomen shows marked thickening of the cecal wall, a narrowed lumen, vague regions of low attenuation within the wall, poorly defined margins of the wall of the cecum, and stranding in the pericecal fat. (b, c) CT scans obtained at lower levels show thickening of the inferior tip of the cecum and nodular stranding of the pericecal fat extending to the right lateral conal fascia, which is thickened. Note the thickened mesentery in c.