05/02/2026 Partner Therapeutics' zenocutuzumab received the FDA orphan drug designation for cholangiocarcinoma Partner Therapeutics' zenocutuzumab received the FDA orphan drug designation for cholangiocarcinoma ( Ref ) The US FDA granted the orphan drug designation to Partner Therapeutics' zenocutuzumab‑zbco (HER2xHER3 bispecific antibody) for the treatment of adults with advanced unresectable or metastatic cholangiocarcinoma.  Zenocutuzumab is being developed in a subset of