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). Here, PTGS2 is linked to melanoma.