Figure 16b. Juvenile polyp. (a) Endoluminal 3D view from CT colonography in an asymptomatic 57-year-old man shows a pedunculated 15-mm polyp extending from a fold in the rectosigmoid region. The polyp was a solitary finding in this case. (b) Digital photograph from optical colonoscopy shows the same polyp. (Reprinted, with permission, from reference 21.)