Tamoxifen Citrate or Z-Endoxifen Hydrochloride in Treating Patients With Locally Advanced or Metastatic, Estrogen Receptor-Positive, HER2-Negative Breast Cancer
Status: ACTIVE_NOT_RECRUITING
Study type: INTERVENTIONAL
Conditions: Recurrent Breast Carcinoma|Stage III Breast Cancer AJCC v7|Stage IIIA Breast Cancer AJCC v7|Stage IIIB Breast Cancer AJCC v7|Stage IIIC Breast Cancer AJCC v7|Stage IV Breast Cancer AJCC v6 and v7
Interventions: DRUG: Endoxifen Hydrochloride|OTHER: Laboratory Biomarker Analysis|OTHER: Pharmacological Study|DRUG: Tamoxifen Citrate
Sponsor: National Cancer Institute (NCI)