...the relationship between FAT1/2/3/4 mutations and efficacy of immunotherapy was explored in the Hellmann cohort consist of patients with NSCLC....Five patient who had mutant FAT1 showed better PFS compared to those with wildtype FAT1 (median, not reached (NR) vs 6.5 months; HR = 0.135; 95% CI: 0.059–0.306; P = .017, Figure 7A). The best overall response (BOR) rates of patients with a mutant FAT1 and those with wildtype FAT1 were 100.0% and 30.0%, respectively (Figure 7B, χ2 = 9.894, P = .001). The durable clinical benefit (DCB) rates of patients with mutant FAT1 and those with wildtype FAT1 were 100.0% and 46.0%, respectively (Figure 5C, χ2 = 5.502, P = .019).