NRAS and neoplasm: In tumours that have BRAF mutation (Figure 1B) [HR (95%CI)=0.81 (0.46, 1.43), p=0.47] and in NRAS mutants, low PTEN level did not significantly influence prognosis (Figure 1C) [HR 95%CI)=0.88 (0.29, 2.69), p=0.82].