In a large molecular epidemiologic study of lung adenocarcinoma in Asian patients, including patients from Taiwan, women were found to have a significantly higher percentage of EGFR mutations than men (61.1% vs 44%).29 The higher percentage of EGFR mutations among female patients with lung adenocarcinoma compared to men with lung adenocarcinoma may explain the better survival of lung adenocarcinoma in Taiwanese women, particularly after the introduction of EGFR inhibitors. This evidence concerns the gene EGFR and lung adenocarcinoma.