Fig. 21From: Gastrointestinal perforation: clinical and MDCT clues for identification of aetiology62-year-old patient with colonic rupture into the abdominal wall. a Coronal and (b) axial contrast-enhanced images illustrate a soft tissue mass (*) arising from the descending colon (arrow), extending into an abscess (ab) containing air-fluid level. Note the extraperitoneal gas bubbles (arrowheads) abutting the muscular fasciasBack to article page