EGFR and lung cancer: Lung cancer remains the leading cause of cancer‐related death worldwide.1 Non‐small cell lung cancers (NSCLC) account for about 85% of lung cancers, and of these, approximately 30% are lung squamous cell carcinomas (SqCC).2 Epidermal growth factor receptor (EGFR) is a cell‐surface tyrosine kinase receptor that can activate pathways associated with cell growth and proliferation when activated.