The FDA on October 24, 2016 approved KEYTRUDA® for the treatment of patients with metastatic Non Small Cell Lung Cancer (NSCLC), whose tumors express PD-L1, as determined by an FDA-approved test. This is the first FDA approval of a checkpoint inhibitor for first-line treatment of Lung cancer. This approval also expands the indication in second-line treatment of Lung cancer to include all patients with PD-L1-expressing NSCLC. KEYTRUDA® is a product of Merck & Co., Inc.