- Conditions
- Anatomic Stage IA Breast Cancer AJCC v8, Anatomic Stage II Breast Cancer AJCC v8, Anatomic Stage IIA Breast Cancer AJCC v8, Anatomic Stage IIB Breast Cancer AJCC v8, Anatomic Stage III Breast Cancer AJCC v8, Anatomic Stage IIIA Breast Cancer AJCC v8, Anatomic Stage IIIB Breast Cancer AJCC v8, Anatomic Stage IIIC Breast Cancer AJCC v8, HER2 Positive Breast Carcinoma, Invasive Breast Carcinoma, Multifocal Breast Carcinoma, Prognostic Stage I Breast Cancer AJCC v8, Prognostic Stage IA Breast Cancer AJCC v8, Prognostic Stage IB Breast Cancer AJCC v8, Prognostic Stage II Breast Cancer AJCC v8, Prognostic Stage IIA Breast Cancer AJCC v8, Prognostic Stage IIB Breast Cancer AJCC v8, Prognostic Stage III Breast Cancer AJCC v8, Prognostic Stage IIIA Breast Cancer AJCC v8, Prognostic Stage IIIB Breast Cancer AJCC v8, Prognostic Stage IIIC Breast Cancer AJCC v8, Synchronous Bilateral Breast Carcinoma
- Interventions
- Trastuzumab Emtansine, Placebo Administration, Tucatinib, Questionnaire Administration, Quality-of-Life Assessment
- Biological · Drug · Other
- Lead sponsor
- Alliance for Clinical Trials in Oncology
- Other
- Eligibility
- 18 Years and older
- Enrollment
- 1,056 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2021 – 2035
- U.S. locations
- 1160
- States / cities
- Birmingham, Alabama • Fairhope, Alabama • Mobile, Alabama + 749 more
Source: ClinicalTrials.gov public record
Updated Oct 28, 2025 · Synced May 22, 2026, 5:46 AM EDT