KRAS and neoplasm: The median OS in the group of patients with wt-KRAS and wt-BRAF tumours was 107.4 months (95% CI: 82- 132.9 months) and in the group of patients with wt-KRAS and mt-BRAF tumours 44.9 months (95% CI: 28.4- 61.5 months) (Figure 1).