Fig. 1

An 83-year-old woman with type II (inflammatory type) giant sigmoid diverticulum, which developed after an episode of acute diverticulitis. Axial (a) contrast-enhanced CT image of the abdomen shows a peridiverticular abscess (arrows), which was percutaneously drained. Axial (b) contrast-enhanced CT image obtained 5 months later (follow-up CT examination) shows a gas-filled structure adjacent to the sigmoid colon (arrow), without air–fluid level or pericolic inflammatory changes, consistent with type II (inflammatory type) GCD