CK20 and CK5/6 Immunohistochemical Staining of Urothelial Neoplasms: A Perspective

Figure 2

(a) Low-grade papillary urothelial carcinoma. (b) Immunohistochemical stain depicting the CK20 (magenta) expression limited to the umbrella cells and a well-formed basal layer depicted by CK5/6 staining (brown). (c) Low-grade urothelial carcinoma with staining of basal cells but lacking umbrella cells.

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