Colorectal cancer screening: The role of CT colonography

Figure 1 Sessile polyp: adenoma with low-grade dysplasia. A: Coronal reformatted image showing a polypoid lesion (arrow), partly surrounded by tagged fluid (asterisks); B: The same lesion as shown on 3D endoluminal view (arrow); C: Conventional colonoscopy.

Figure 2 Non-polypoid (flat) lesion: advanced adenoma. A: On 2D axial computed tomography image an irregularly thickened fold (arrow) is detected; B: On 3D endoluminal image the lesion is better appreciated (black arrow), in particular if compared with the normal adjacent colonic folds (white arrows); C: The same lesion at colonoscopy before removal.