AZD9291, an Irreversible EGFR-TKI, in Relapsed EGFR-mutated Non-small Cell Lung Cancer Patients Previously Treated With an EGFR-TKI, Coupled to Extensive Translational Studies

This is a phase II, single-arm study to assess the safety and efficacy of AZD9291 (80 mg, orally, once daily) in second-line (or later) patients with EGFR mutation-positive, locally advanced or metastatic NSCLC, who have progressed following treatment with an approved epidermal growth factor tyrosine kinase inhibitor agent. If feasible, subjects will have to provide a biopsy sample for molecular testing following confirmed disease progression on the most recent treatment regimen. A second biopsy will be sampled at progression on AZD9291, if feasible. Liquid biopsies will be sampled throughout the treatment period. Subjects should continue on study treatment until RECIST 1.1-defined progression or until a treatment discontinuation criterion is met. There is no maximum duration of treatment as subjects may continue to receive investigational product beyond RECIST 1.1 defined progression as long as they are continuing to show clinical benefit, as judged by the investigator.