Endoscopic appearance of multiple polyps in familial adenomatous polyposis

Endoscopic findings at multiple levels in a 50-year-old man with familial adenomatous polyposis. Multiple polyps of various sizes are seen. At colectomy, some of these polyps had areas of high-grade dysplasia and early malignant transformation.

Endoscopic appearance of the normal sigmoid colonic mucosa. The fine vasculature is easily visible, and the surface is shiny and smooth. The folds are of normal thickness.