On the other hand, among the 81 patients with EGFR mutations detected in primary lung cancer tissues, the median DFS or OS has not been reached and the survival of the six patients with mutations detected in LN was not different from their counterparts without mutations in LN (DFS: p = 0.904; OS: p = 0.278, Figure 3E,F). This evidence concerns the gene EGFR and lung cancer.