AstraZeneca announced that the U.S. Food and Drug Administration accepted a supplemental New Drug Application for the use of Tagrisso (osimertinib) – a third-generation, irreversible epidermal growth factor receptor (EGFR) tyrosine kinase inhibitor with clinical activity against central nervous system metastases – in the first-line treatment of patients with metastatic non-small cell lung cancer whose tumors have EGFR mutations.