GDF15 and melanoma: A 31-GEP for melanoma, often referred to as the “DecisionDx-Melanoma” test, analyses a panel of 27 prognostic genes alongside 3 control genes, including genes like LGALS1, SULF1, COL4A1, ITGB3, PLAT, SERPINE2, GDF15, TGFBR1, LOXL4, CXCL8, and MLANA.