According to the American Institute for Cancer Research (AICR), lung cancer wasthe most common cancer in the world among all cases documented in 2018.Non-small cell lung cancer (NSCLC) accounts for most (about 85%) lung cancers.Activating mutations in the epidermal growth factor receptor (EGFR) gene arefound in 40–89% of NSCLCs. The gene discussed is EGFR; the disease is lung cancer.