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Computed Tomography Colonography (CTC) is a feasible and minimally invasive technique widely accepted both for screening and diagnosis of colon cancer. The major limit of CTC compared to optical endoscopy resides in its minor specificity due to false positive findings. Several non-pathologic aspects mimicking true polyps are described in medical literature and are well known to radiologists. In this study we report seven pathologically documented cases of reactive edema appearing after a previous endoscopic polipectomy. This represents another possible and relatively common source of false positive examination of which radiologists should be aware when interpreting CTC after previous endoscopic removal of polyps.

Reactive Edema after Endoscopic Polipectomy Simulating a Polypoid Lesion: A New Pitfall in CT Colonography