EGFR and lung adenocarcinoma: Of the 200 patients, 115 (58%) exhibited an EGFR mutation and 85 (42%) exhibited wild-type EGFR. The mean age of the 200 patients with EGFR wild-type and mutant lung adenocarcinoma was 63.61 ± 11.42 and 59.39 ± 9.73 years, respectively.