CD274 and renal cell carcinoma: Using a semiquantitative method, namely the H-score (percentage of positive cells showing a membranous staining pattern [0–100] × staining intensity [0–3]), Kawakami et al. found that 118 patients with sarcomatoid RCC and 92 patients with non-sarcomatoid clear cell RCC were positive for PD-L1 expression.8