Figure 5. Unblinded 11-mm malignant polyp located near the hepatic flexure.Left. Three-dimensional endoluminal view from virtual colonoscopy shows a large polypoid lesion on the edge of a fold. Right. Digital photograph from optical colonoscopy shows the same polyp, which was found only after several attempts to reposition the instrument because of repeated slippage in this region. Invasive adenocarcinoma was confirmed at surgery.

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