The percentage of mutated adenocarcinomas was 12.8% (92 out of 716 adenocarcinomas), whilst in all other histological types the percentage of EGFR mutations did not surpass 5% (9 out of 240 samples), and no mutation was detected in squamous cell carcinomas (Fig 2, Table 3). This evidence concerns the gene EGFR and adenocarcinoma.