According to the study of P11014 and P1029, Crizotinib is a first-line therapy for advanced non squamous non small cell lung cancer with positive ALK rearrangement.This study aims to explore the efficacy and safety of clozotinib as a first-line therapy for advanced non-squamous non-small cell lung cancer with ALK-positive mutations in the real world. Among them, ALK positive was based on NGS test results, exploring the new drug resistance mechanism of ALK under clozotinib treatment mode and consistency between plasma and tissue detection driving genes, and finally assessing the role of plasma dynamic detection driving gene mutation spectrum in predicting disease progression risk. A retrospective study of 120 patients with advanced NSCLC using clozotinib ALK positive mutation was conducted to observe the efficacy and safety of clozotinib regimen in the real world.
