Urothelial Carcinoma-In-Situ : CK20

Section Editor: Dharam M. Ramnani, MD

Virginia Urology, Richmond, VA, USA

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Image Description

Urothelial carcinoma-in-situ involving Brunn's nests. The smaller nest on the left is uninvolved. With CK20, there is strong immunoreactivity in the CIS. The uninvolved nest on the left is negative.
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