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Biomarker Analysis in Tumor and Blood Samples from Patients with Stage IV Non-small Cell Lung Cancer and EGFR, ALK, ROS1, or BRAF Mutations Undergoing Targeted Therapy

Trial Status: active

This research trial studies biomarkers in tumor and blood samples from patients with stage IV non-small cell lung cancer and EGFR, ALK, ROS1, or BRAF mutations who are undergoing targeted therapy. Studying biomarkers in the laboratory may help doctors learn more about differences found between pretreatment and early treatment tumor samples from patients with stage IV lung cancer.