The combined efficacy of mobocertinib and amivantamab was tested in 2 human patient-derived xenograft (PDX) models expanded from patients with EGFR ex20ins+ NSCLC, namely CTG-2842 (EGFR A767dupASV) and J100672 (EGFR S768dupSVD)….in the J100672 model, amivantamab 30 mg/kg plus mobocertinib 10 mg/kg yielded a GRI of 168%, with significantly reduced tumor volume over monotherapies (P<0.001).