Normal urothelium. Cell layers. Urothelium = all epithelial cells. Superficial/umbrella Intermediate 2 to >10 cells Basal . Normal urothelial mucosa. Mucosa = Urothelium + stroma beneath urothelium deep to muscularis mucosae. Normal urothelial mucosa. Normal urothelial mucosa.
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Mucosa = Urothelium + stroma beneath urothelium deep to muscularis mucosae
Distribution of muscularis mucosae (as % of bladders)
Prominent & continuous 3 %
Discontinuous & interrupted 20 %
Scattered & dispersed 71 %
Absent 6 %
Ta and Tis tumors