(A) The relative expression of basal (KRT5, KRT14, CD44 and KRT6A) and luminal markers (UPK1A, UPK2, ERBB2, FOXA1 and GATA3) was analyzed in human invasive urothelial carcinomas from 10 patients. Data are presented as the mean ± SEM. The gene discussed is ERBB2; the disease is urothelial carcinoma.