KRT5 and urothelial carcinoma: UC1/p-UC1 and UC2/p-UC2 expressed only luminal markers (KRT7, GATA3), supporting their classification as luminal-type urothelial carcinomas, while UC3/p-UC3 expressed basal markers (KRT5, KRT6) and KRT7 but lacked GATA3 and keratinization markers, confirming its basaloid subtype.