PD-L1 positivity in both pRCC and chRCC tumor cells was not correlated with any of the examined clinicopathological features such as age at surgery, sex, pathological tumor stage, WHO/ISUP grade, presence of tumor necrosis, angioinvasion, neuroinvasion, renal fibrous capsule invasion, perinephric fat invasion and risk of death (Table 2 and Table 3). This evidence concerns the gene CD274 and chromophobe renal cell carcinoma.