Local Consolidative Therapy and Brigatinib in Treating Patients With Stage IV or Recurrent Non-small Cell Lung Cancer

PRIMARY OBJECTIVES: I. To assess the safety, tolerability, and feasibility of brigatinib with local consolidative therapy (LCT) in tyrosine kinase inhibitor-naive ALK-rearranged advanced (non-small cell lung cancer) NSCLC. SECONDARY OBJECTIVES: I. To determine progression-free survival (PFS) using modified Response Evaluation Criteria in Solid Tumors (RECIST 1.1) in advanced ALK+ NSCLC patients treated with local consolidative therapy (LCT) after achieving stable disease or partial response with first-line brigatinib treatment. II. To determine overall survival (OS). III. To assess time to progression (TTP) of non-LCT lesions. EXPLORATORY OBJECTIVES: I. To assess time to appearance of new metastatic lesion(s). II. To determine the utility of pre-treatment, pre-LCT, and post-LCT circulating free tumor deoxyribonucleic acid (DNA) (cfDNA) as a potential prognostic and predictive biomarkers. II. To evaluate potential impact of LCT on mechanisms of ALK resistance with molecular analysis of post-progression biopsies. OUTLINE: Patients receive brigatinib orally (PO) once daily (QD) on days 1-28. Treatment repeats every 28 days for up to 2 courses in the absence of disease progression or unacceptable toxicity. Patients then undergo LCT for up to 3 weeks in the absence of disease progression or unacceptable toxicity. Within 7 days after completion of LCT, patients receive brigatinib PO QD on days 1-28. Cycles repeat every 28 days in the absence of disease progression or unacceptable toxicity. After completion of study treatment, patients are followed up at 30 days and every 3 months for up to 2 years.