EGFR and adenocarcinoma: Table 1 describes the characteristics of the patients and tumors based on their EGFR status. The percentage of EGFR mutations was significantly higher in younger patients (p = 0.010), female sex (p < 0.001), lower Brinkman Index (p < 0.001), and early clinical stage (p < 0.001). All mutated tumors were adenocarcinomas except for one case of pleomorphic carcinoma. Table 2 summarizes the histological types of adenocarcinomas. EGFR-mutated adenocarcinomas were lepidic predominant, papillary, or acinar types (p < 0.001); no other histological types showed mutations.