Imaging Case of the Week 202 Answer

The abdominal x-ray shows a thumb-printing sign, as seen below, which is indicative of mucosal oedema of the large bowel due to colitis from a variety of conditions (e.g. ulcerative colitis, pseudomembranous colitis, and ischaemic colitis).

colitis thumbprinting sign


Coronal CT thumbprinting

Axial CT thumbprinting sign

This particular patient, however, was suffering from an infective colitis.