BAP1 and nonpapillary renal cell carcinoma: In the TCGA database, several significantly mutated genes have been identified, including MET, SETD2, NF2, KDM6A, SMARCB1, FAT1, BAP1, PBRM1, STAG2, NFE2L2 and TP53. Notably, somatic mutations in MET are mainly found in type 1 PRCC, whereas type 2 PRCC is primarily associated with somatic mutations in SETD2, BAP1 and PBRM1, all of which are also frequently mutated in human ccRCC.