Oncocytoma : Degenerative Atypia

Section Editor: Dharam M. Ramnani, MD

Virginia Urology, Richmond, VA, USA

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Image Description

Focal atypia of degenerative type is quite common in oncocytomas. It consists of marked nuclear hyperchromasia and pleomorphism. However, there is no increase in mitotic activity and Ki-67 labeling index.

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