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Urothelial Carcinoma - Plasmacytoid Variant

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UrinaryBladder_Variants_Plasmacytoid5_CK.jpg

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Strong diffuse immunoreactivity for CK7 along with H&E features (previous image) confirms the diagnosis of urothelial carcinoma, plasmacytoid variant. CD138, the marker of plasmacytic differentiation is frequently expressed by this tumor and should not be relied on to differentiate it from plasmacytoma.

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