The reason for this is to provide the appropriate treatment by investigating whether the tumor expresses the epidermal growth factor receptor (EGFR), anaplastic lymphoma kinase (ALK), proto-oncogene 1 (ROS-1), proto-oncogene B-Raf (BRAF), and programmed death-ligand 1 (PD-L1) [6,8,9,10,11,12]. Here, EGFR is linked to neoplasm.