FOLH1 and chromophobe renal cell carcinoma: Spatz et al. evaluated the PSMA expression in patients affected by CRCC, ChRCC and PRCC, showing that in all histotypes only the endothelia of the tumoral microvessels were PSMA+ under IHC, with the exception of two PRCC patients, in which cytoplasmatic PSMA expression was observed in the specimens.