Distribution and Detectability of EGFR Exon 20 Insertion Variants in Non-small Cell Lung Cancer

Epidermal growth factor receptor (EGFR) exon 20 insertion (ex20ins) mutations represent 5%−10% of EGFR mutations in non-small cell lung cancer (NSCLC). Identifying patients with EGFR ex20ins is challenging due to the limited coverage of polymerase chain reaction (PCR) assays and the relatively recent use of next-generation sequencing (NGS). This study analyzes the spectrum of EGFR ex20ins…

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