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From the case:
Thumbprinting sign and its differential diagnosis
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An illustration of thumbprinting sign and its differential diagnosis
Case Discussion
Thumbprinting is a radiological sign of large bowel fold thickening, usually caused by edematous change, related to an infective or inflammatory process (colitis) or due to mucosal/submucosal hemorrhage. The normal haustra become thickened at regular intervals appearing like thumbprints projecting into the bowel lumen.
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