Normal Urothelium : Brunn Nests
Section Editor: Dharam M. Ramnani, MD
Virginia Urology, Richmond, VA, USA
Image Description
Note the relatively uniform size and shape of the nests and the lack of cytologic atypia. Irregularity in size and shape, location deep within the lamina propria, and cytologic atypia should raise the concern for nested variant of urothelial carcinoma.