Villous Adenoma
Section Editor: Dharam M. Ramnani, MD
Virginia Urology, Richmond, VA, USA
Image Description
Villous adenomas of bladder are morphologically similar to those arising in the intestinal tract. The image shows a villous adenoma arising in the urachus near the dome. The right one-third of this cystic lesion is lined by urothelium; the remainder is lined by intestinal type epithelium with goblet cells. Villous adenomas can also originate in metaplastic epithelium, usually near trigone.