Figure 2: Axial images of contrast-enhanced abdominal MDCT showed wall thickening with narrowing of the lumen and multiple diverticula of the sigmoid colon. There is also pericolic fat stranding, an umbilical hernia (a), thickening of the abdominal wall ((a), (b)), and extraluminal air collection (b). In image (c), we see a bilocular abscess in the lower left abdominal wall and the communication between the abscess and the intra-abdominal inflammation.