Targeting the Gatekeeper: Osimertinib in EGFR T790M Mutation-Positive Non-Small Cell Lung Cancer

In 2015, the FDA approved an unprecedented number of new therapies for non-small cell lung cancer (NSCLC), among them therapies addressing specific genomic tumor subsets in the setting of development of resistance to first-line targeted therapy. Osimertinib (Tagrisso, formerly AZD9291; AstraZeneca) is indicated for patients with metastatic EGFR T790M mutation-positive NSCLC, as detected by an FDA-approved test, who have progressed on or after EGFR tyrosine kinase inhibitor therapy. It received breakthrough therapy designation, priority review status, and accelerated approval from the FDA. (C) 2016 AACR.