In OAK/POPLAR cohort (atezolizumab monotherapy, 2nd line or more), TMB in BRCA1/2 mutant group was significant higher (19.2 vs. 10.24, P=0.008) than group of wild-type. The ORR of mutant group was 21.9% (Table), median PFS was 2.5 months, median OS was 9.5 months. The ORR and PFS were comparable between mutant and wild-type groups, while OS of the mutant group was significantly shorter than that in wild-type group...multicohort analysis showed a trend of worse survival in BRAC-mutant NSCLC patients after ICI treatment compared to those in wild-type group...