BSG and nonpapillary renal cell carcinoma: In the ccRCC cohort 2 (TCGA) only MCT4, but not CD147 mRNA levels and, even superior, SLC16A3 DNA methylation in the promoter region at cg18345635 significantly predicted survival (HR = 1.60, 95%CI (1.21, 2.12); P(logrank) = 0.0024; Harrell's c-index: 61.4 and HR = 0.018, 95%CI (0.003, 0.119); P(logrank) = 0.00003; Harrell's c-index: 64.9%, respectively).