KRAS mt pts with STK11/KEAP1 that were treated with immunotherapy-based regimens had shorter PFS (1.1 vs 7.6 m, p = 0.001) and OS (1.4 vs 90.9 m, p = 0.0007) compared to those treated with chemotherapy alone....Our data shows that pts with KRAS co-mt with STK11/KEAP1 had worse PFS and OS with the addition of immunotherapy compared to chemotherapy alone...