CDK4 and melanoma: The top 20 genes were regarded as melanoma genes (CDKN2A, MC1R, NRAS, MITF, PTEN, TERT, POT1, BRAF, TP53, TYR, CDK4, MLANA, PMEL, IL2, ERCC2, IFNG, TNF, PTGS2, CDKN2B, TYRP1).