Efficacy was observed in patients with various mechanisms of EGFR TKI resistance, including EGFR C797S mutation, MET amplification, HER2 mutation, BRAF fusion, and PIK3CA mutation….Patritumab deruxtecan at 5.6 mg/kg provides promising evidence of preliminary antitumor activity and safety in heavily pre-treated patients with locally advanced or metastatic EGFRm NSCLC.