Figure 2

Conventional adenoma (CA) with a focal villous architecture. (A), Tubular adenoma (TA) composed of columnar cells with diffuse conventional dysplasia and focal epithelial serration (hematoxylin and eosin; original magnification × 40). (B), Higher magnification of the box in panel A, showing dysplastic cells with cytoplasmic eosinophilia and ectopic crypts (hematoxylin and eosin; original magnification × 200). (C), Tubulovillous adenoma (TVA) with a villous architecture and columnar cells with diffuse conventional dysplasia (hematoxylin and eosin; original magnification × 100). (D), Higher magnification of the box in panel C, displaying ectopic crypts (arrows) (hematoxylin and eosin; original magnification × 200).