3D CT rendering of pedunculated colon polyp as new “clapper-
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The incidental detection of a tubulovillous adenoma at a contrast-enhanced computed tomography (CECT) with nondedicated protocol, performed under emergency conditions, is an uncommon finding. This article reports a case of a woman presenting with a subocclusive episode. A CECT scan was performed and a pedunculated polyp could be appreciated at 3D-reconstruction images. A particular depiction of pedunculus of the polypoid lesion resembles a clapper-bell could help to define the vegetating lesion at the volume-rendering reconstruction images.

This case emphasizes the fundamental role of postprocessing in the clinical practice to improve the diagnostic accuracy of abdominal CT scan. In addition, a potential new radiologic sign, the “clapper-bell sign” is proposed, as literature about the appearance of a polyp at CECT, performed without a dedicated protocol for colonoscopy, is poor...

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