A total of 206 patients were assessed, including 92 cutaneous melanoma patients with 12 NRAS mutations and 114 noncutaneous melanoma patients with 21 NRAS mutations….NRAS wild-type melanoma included patients with BRAF or KIT mutations….In cutaneous melanoma, 21 from 92 patients had NRAS mutations. The overall ORR of anti-PD-1 monotherapy in the NRAS mutant population was 9.5%, which was lower than the rate of 23.9% among the wild-type patients (P=0.223).