BCAM and nonpapillary renal cell carcinoma: The results revealed that, in the 333 samples of ccRCC, the methylation level of 8 out of 9 probes negatively correlated with BCAM gene expression, in which CpG island-related probe cg22640961 (r = − 0.54, p < 0.001) showed the strongest negative correlation, followed by cg12249345 (r = − 0.52, p < 0.001), cg21978694 (r = − 0.51, p < 0.01), cg24122751 (r = − 0.47, p < 0.001), cg14037553 (r = − 0.33, p < 0.001), cg17489534 (r = − 0.32, p < 0.001), cg23318764 (r = − 0.24, p < 0.001) and cg05670193 (r = − 0.17, p < 0.01).