Multicenter Study of Rociletinib Administered to Patients With Previously Treated Mutant EGFR Non-small Cell Lung Cancer

This is a Phase 2, single arm, open-label, dual cohort, multicenter study evaluating the safety and efficacy of rociletinib administered orally to patients with previously treated mutant EGFR NSCLC. Patients will be enrolled into 2 cohorts. Cohort A will enroll approximately 125 eligible patients who are centrally confirmed T790M-positive. Cohort B will be a continuation of the study and will enroll up to approximately 100 eligible patients who will be either centrally confirmed T790M-positive or T790M-negative. All patients (for Cohort A and B) should have experienced disease progression while on treatment with the first single-agent EGFR-directed TKI (EGFR-TKI) for advanced/metastatic NSCLC. One line of chemotherapy prior to the EGFR-TKI treatment is permissible. The study (Cohorts A and B) will consist of a screening phase to establish study eligibility and document baseline measurements, an open-label treatment phase, in which the patient will receive rociletinib to ascertain safety and efficacy until disease progression as defined by RECIST Version 1.1, clinical tumor progression, or unacceptable toxicity as assessed by the investigator. For patients with clinical progression, radiographic assessment should be performed to document evidence of radiographic progression.