FOLH1 and nonpapillary renal cell carcinoma: The presence of positive immunohistochemistry (IHC) staining for PSMA is found in 75–100% of ccRCC cases and is the highest among all types of RCC—positive IHC staining was seen only in 30–61% cases of chrRCC and in 0–28% of pRCC [42,45,46,47].