NCT03199885 2025-12-30Testing the Drug Atezolizumab or Placebo With Usual Therapy in First-Line HER2-Positive Metastatic Breast CancerNational Cancer Institute (NCI)Phase 3 Completed190 enrolled 12 charts
NCT01922921 2023-04-18Vaccine Therapy With or Without Polysaccharide-K in Patients With Stage IV HER2 Positive Breast Cancer Receiving HER2-Targeted Monoclonal Antibody TherapyUniversity of WashingtonPhase 1/2 Completed31 enrolled 8 charts