We found that the frequency of EGFR mutations in lung adenocarcinomas and non-squamous NSCLC was broadly in keeping with results from two previous large studies in European patients with lung adenocarcinomas that found EGFR mutations in 10% and 16.6% of patients, with exon 19 deletions representing 46% and 62% of all EGFR mutations [12], [14]. The gene discussed is EGFR; the disease is lung adenocarcinoma.