EGFR and lung adenocarcinoma: In our results (Table 2), the overall mutation rate of the EGFR gene in patients with lung adenocarcinoma was 48.36%, including 47.46% (56/118) EGFR-19-Del, 42.37% (50/118) EGFR-21-L858R, 4.24% (5/118) EGFR-20-T790M mutation, 2.54% (3/118) EGFR-21-L861Q mutation, 2.54% (3/118) EGFR 20-insertion, and 0.85% (1/118) EGFR-18-G719X mutation.