Of the 42 patients with advanced NSCLC harboring EGFR mutations who received TKIs… non-resistance co-mutations in APC, ATM, CDKN2A, MET, TP53, and 5 (12%) had resistance concurrent mutations in KRAS, PIK3CA, PTEN and SMAD4…. Median OS in the absence of co-mutations and in the presence of non-resistance mutations was 18.1 and 16.8 months, respectively, while it was significantly reduced in the group with resistance mutations (7.7 months, HR=4.6, 95% CI=1.56-13.3, p=0.002, compared to the other two groups).