EGFR and lung adenocarcinoma: Many lung adenocarcinomas have an actionable driver mutations involving genes such as epidermal growth factor receptor (EGFR), anaplastic lymphoma kinase (ALK), Kirsten rat sarcoma virus (KRAS), MET, c-ros oncogene 1 (ROS1), HER2, BRAF, RET, and NTRK [4].