Overall, 3 partial responses were observed (2 with KRAS G12D, 1 with KRAS G12R); the objective response rate was 16.7% (95% CI 4.0-41.4). At 8 weeks, the disease control rate was 66.7% (95% CI 41.0-86.7)….Combination treatment of regorafenib and oral methotrexate in patients with KRAS mutant NSCLC was limited due to toxicity.