Both NSCLC and melanoma cohorts included ICI-treated patients...MUC16 mutation was associated with improved overall survival in both the NSCLC (hazard ratio, 0.34; 95% CI, 0.12-0.99; P = .04) and melanoma (hazard ratio, 0.57; 95% CI, 0.36-0.90; P = .02) cohorts.