Several key “driver” genes are mutated in NSCLC including, epidermal growth factor receptor (EGFR), anaplastic lymphoma kinase (ALK), KRAS, human epidermal growth factor receptor 2 (HER2), v-raf murine sarcoma viral oncogene homolog B1 (BRAF), MET, phosphatidylinositol 3-kinase catalytic α (PIK3CA), AKT and mitogen-activated protein kinase kinase 1 (MAP2K1). The gene discussed is KRAS; the disease is non-small cell lung carcinoma.