USP18 and melanoma: The genes in the overlap include DDX58, EIF2AK2, GBP3, HERC5, IFIT1, IFIT2, IFIT3, OAS1, OAS2, OAS3, PSMB8, SP100, STAT1, UBE2L6, USP18, and XAF1. Our model indicates that the relatively higher expression of these genes is associated with a good prognosis in melanoma.