KRT5 and urothelial carcinoma: Pertinent to this differential diagnosis discussion is also one caveat, that GATA3 often stains the basal cells of the prostate, especially in the setting of atrophy and post radiation [91,92], while very recent scholarship has indicated D2-40 as a marker of prostatic basal cells that (unlike p63, p40, CK5/6, or HMWCK) is negative in both urothelial carcinoma and intraductal carcinoma of the prostate.