BOTHELL, Wash.--(BUSINESS WIRE)--Seagen Inc. (Nasdaq: SGEN) today announced that the Phase 3 HER2CLIMB-02 clinical trial of TUKYSA® (tucatinib) in combination with the antibody-drug conjugate ado-trastuzumab emtansine (Kadcyla®) met its primary endpoint of progression-free survival (PFS). Patients in the trial had u...