The FDA on July 30, 2019 approved KEYTRUDA® for patients with recurrent, locally advanced or metastatic Squamous Cell Carcinoma of the Esophagus (ESCC), whose tumors express PD-L1 (Combined Positive Score-CPS of 10 or more), as determined by an FDA-approved test, with disease progression after one or more prior lines of systemic therapy. FDA also approved a new use for the PD-L1 IHC 22C3 pharmDx kit as a companion diagnostic device for selecting patients for the above indication. KEYTRUDA® is a product of Merck & Co., Inc.