Results showed that MAP2K1/2 and MAP3K14 mutations were associated with an increased progression-free survival (PFS; HR, 0.42; 95% CI, 0.18-0.96; P = 0.0342) and a superior overall survival (OS; HR, 0.28; 95% CI, 0.09-0.90; P = 0.0227) in melanoma with significance at borderline level. TMB levels in melanoma patients with MAP2K1/2 and MAP3K14 mutations were higher than in wild-type patients (P = 0.007).