Figure A1.

Progression-free survival (PFS) in stage IV patients receiving first-line EGFR TKIs (only patients using Qiagen^® EGFR RGQ PCR kit for their tissue samples). (a) Patients with concordant EGFR mutation test results in liquid/tissue biopsy vs. those with discordant results. (b) Patients with lymph node involvement (N1–3 disease) vs. those without lymph node involvement (N0 disease). Abbreviations: EGFR = epidermal growth factor receptor; ECOG = Eastern Cooperative Oncology Group; TKI = tyrosine kinase inhibitors.