Infiltrating urothelial carcinoma, micropapillary subtype

(A) The micropapillary subtype of UC is characterized by fine papillae with high-grade cytologic features. Necrosis (lower right) is commonly present (20×).

(B) The papillae are usually contained within tissue retraction spaces, simulating lymphatic spaces (40×).

Courtesy of Cristina Magi-Galluzzi, MD, PhD.

Graphic 69301 Version 2.0

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