KRT20 and urothelial carcinoma: Consistent with the correlation of keratin expression and basal/luminal types of MIBC, early urothelial carcinomas showing CK5/6-high/CK20-low and CK5/6-low/CK20-high immunoreactions were enriched for basal type and luminal type/urothelial differentiation signature genes, respectively, in this study and in the previous one [1].