Figure 1.

Photomicrographs (hematoxylin & eosin stain) of different types of colon polyps.

Notes: Histologically, a hyperplastic polyp shows epithelial hyperplasia characterized by a serrated appearance without nuclear atypia (A); a tubular adenoma contains elongated crypts lined by columnar epithelial cells with nuclear atypia, including nuclear elongation, pleomorphism, and hyperchromasia (B); a villous adenoma is characterized by a villiform architecture lined by columnar epithelial cells with nuclear atypia similar to that seen in a tubular adenoma (C). Nx: picture taken with Nx objective lens.