Agilent's Dako confirms FDA approval of NSCLC diagnostic Dako, an Agilent Technologies (A) company and a worldwide provider of cancer diagnostics, announced the FDA approval of a new companion diagnostic assay that can reveal whether a patient with advanced non-small cell lung cancer, or NSCLC, is likely to respond to a new form of treatment. The approval of PD-L1 IHC 22C3 pharmDx strengthens Dako's portfolio of companion diagnostics and the company's leadership position in developing and commercializing companion diagnostic products. Dako developed PD-L1 IHC 22C3 pharmDx in partnership with Merck (MRK), maker of the anti-PD-1 therapy Keytruda. The FDA approved PD-L1 IHC 22C3 pharmDx for use in the United States. Dako hopes to gain regulatory approval for the new diagnostic in Canada, Europe and other jurisdictions next year.