Fig. 3
From: Giant colonic diverticulum: radiographic and MDCT characteristics
A 68-year-old man with giant sigmoid diverticulum (GSD) associated with acute diverticulitis. Abdominal radiograph (a) shows a large air-filled structure throughout the right pelvis, consistent with GSD. Axial (b and c) contrast-enhanced CT images through the pelvis show a predominantly gas-filled structure with air–contrast material level arising (arrow) from the sigmoid colon (S). The thickened wall of the diverticulum and the surrounding fat infiltration denote acute diverticulitis (arrows)