Agilent Technologies, Inc. announced that the companys PD-L1 IHC 22C3 pharmDx assay has expanded its use in Europe. The assay is now CE-IVD marked for use as an aid in identifying esophageal cancer patients for treatment with KEYTRUDA using Combined Positive Score = 10.1 In Europe, KEYTRUDA is approved in combination with platinum- and fluoropyrimidine-based chemotherapy for patients with locally advanced unresectable or metastatic esophageal carcinoma or HER2 negative gastroesophageal junction adenocarcinoma whose tumors express PD-L1. In Europe, almost 53,000 people were diagnosed with esophageal cancer in 2020, and this type of cancer caused more than 45,000 deaths the same year. KEYTRUDA is a humanized monoclonal antibody that enhances the ability of the immune system to detect and fight tumor cells. KEYTRUDA blocks the PD-1 pathway, thereby activating T lymphocytes that may affect both tumor cells and healthy cells.2 KEYTRUDA and other targeted immunotherapies are changing cancer treatment, and their therapeutic value is being realized across a growing list of cancer types. PD-L1 IHC 22C3 pharmDx was developed by Agilent as a companion diagnostic for KEYTRUDA in partnership with Merck.