EGFR and lung adenocarcinoma: In EGFR-mutated lung adenocarcinoma, Bjaanæs et al. and Chitale et al. demonstrated characteristic miRNA and mRNA signatures, respectively; however, no studies have validated their results [38,43]; In the current study, we identified the 19-miRNA and 431-mRNA expression signatures in EGFR-mutated tumors.