For all patients (n = 13), stable disease was achieved in 9 (69.2%), progressive disease in 3 (23.1%)...Based on the best overall response, the disease control rate (DCR) was 69.2% (95% CI 39–91)….Median PFS was 12.4 weeks (95% CI 6.9–36.6) and median OS was 41.9 weeks (95% CI 31.7–not evaluable) weeks (Table 4)....This phase 1 study demonstrated that DS-1205c was well-tolerated in patients with advanced EGFR-mutant NSCLC when administered in combination with osimertinib. No new safety/tolerability signals were identified.