EGFR and non-small cell lung carcinoma: The epidermal growth factor receptor (EGFR) also known as ErbB or HER1 is a member of the ErbB receptor tyrosine kinase (RTK) family that is overexpressed in many human malignancies including NSCLC (Normanno et al., 2006; Yoshida et al., 2010; Kumarakulasinghe et al., 2015).