Furthermore, gene amplifications of avian erythroblastic leukemia viral oncogene homolog 2 (ERBB2), MET, ROS1, Neuregulin 1 (NRG1), neurotrophic tyrosine kinase receptor 1 (NTRK1), and RET have also been found in lung adenocarcinoma [5–8]. Here, NRG1 is linked to lung adenocarcinoma.