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

Figure 5

(a) High-grade urothelial carcinoma with early invasion showing strong CK20 cytoplasmic staining and absence of basal cells. (b) High-grade urothelial carcinoma with extensive invasion. The carcinoma cells are diffusely positive for CK20, but the basal layer is absent.

(a)

(b)