ERBB2 and non-small cell lung carcinoma: The evaluation of the expression level of the HER2 gene for the diagnosis and treatment of tumors is usually conducted using immunohistochemical techniques.The aim of the current study is to explore the feasibility of real-time quantitative PCR and the 2[-Delta Delta C(T)] method in detecting the level of HER2 gene overexpression in non-small cell lung cancer (NSCLC).