11,826 Images : Last Update : Nov 19, 2022

Villous Adenoma : Gross

prev
slide 31 of 113
next
No Image
Colon_Polyp_VillousAdenoma1_AdenoCA_resized.jpg

Close

Comments:
Villous adenomas show slender finger-like processes on the surface in 75% or more of the tumor. This accounts for granular appearance often seen in gross specimens. Pure villous adenomas are quite uncommon and make up between 3% and 15% of all colonic adenomas. Villous architecture is more frequently seen as a component in Tubulovillous adenomas. The larger the adenoma, the greater the frequency of villous component. Villous adenomas tend to be large and have greater degree of dysplasia. Distribution: Tubular adenomas 80-85%; Tubulovillous adenomas 8-16%; Villous adenomas 3-15%.

prev
slide 31 of 113
next