[Expert consensus on clinical practice of EGFR exon20 insertion detection in non-small cell lung cancer in China (2024 edition)].

About 82% of the Chinese lung cancer population is non-small cell lung cancer(NSCLC), and the epidermal growth factor receptor (EGFR) gene is the most common driver mutation in the Chinese lung cancer population (51.7%-54.4%). In recent years, the rapid development and wide application of targeted therapies, especially EGFR tyrosine kinase inhibitors, have significantly improved the survival time and quality of life of Chinese lung cancer patients. EGFR exon20 insertion (EGFR ex20ins) accounts for 0.3%-2.9% in NSCLC patients in China. Recently, several tyrosine kinase inhibitors have been approved for the therapy of EGFR ex20ins NSCLCs. The variety variants and high molecular heterogeneity of EGFR ex20ins NSCLCs asks for more accurate detection methods, and clinical routine detection process needs to be further standardized. On account to the practical questions of EGFR ex20ins detection, this consensus was finally reached based on the combination of literature, expert experience and internal discussion among committee members, in the hope of providing the guide for standardizing the EGFR ex20ins detection.