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Study identifier: NCT06184750 Synced from ClinicalTrials.gov · July 28, 2026
● Recruiting

Finding the Best Tamoxifen Dose for Breast Cancer Risk Reduction in Premenopausal Women, RENAISSANCE Trial

Condition: Breast Atypical Ductal Hyperplasia · Breast Atypical Lobular Hyperplasia · Breast Carcinoma  ·  Sponsor: National Cancer Institute (NCI)

PhasePhase 2
Planned participants200
Who can joinFemale, 18 Years to 55 Years
Healthy volunteersNo

About this study

This phase II trial evaluates response-guided low-dose tamoxifen for reducing breast density in women who are at higher than average risk for breast cancer. Increasing breast density is a well established risk factor for breast cancer. Tamoxifen is a selective estrogen receptor modulator. It works by blocking the effects of the hormone estrogen in the breast. Tamoxifen has been shown to reduce breast density, even at reduced dosages, and is approved for the prevention of breast cancer.

This description comes directly from the study's public registry record.

Talk to the study team

Contact details are listed per location below or on the registry record.

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Locations (11)

University of Arizona Cancer Center - Prevention Research ClinicTucson, Arizona, United StatesRecruiting
Northwestern UniversityChicago, Illinois, United StatesRecruiting
University of Illinois College of Medicine - ChicagoChicago, Illinois, United StatesRecruiting
University of Kansas Cancer CenterKansas City, Kansas, United StatesRecruiting
Brigham and Women's HospitalBoston, Massachusetts, United StatesWithdrawn
Dana-Farber Cancer InstituteBoston, Massachusetts, United StatesRecruiting
University of Michigan Rogel Cancer CenterAnn Arbor, Michigan, United StatesRecruiting
Washington University School of MedicineSt Louis, Missouri, United StatesRecruiting
Case Western Reserve UniversityCleveland, Ohio, United StatesRecruiting
Medical University of South CarolinaCharleston, South Carolina, United StatesRecruiting
UT MD Anderson Cancer CenterHouston, Texas, United StatesRecruiting

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Source record: clinicaltrials.gov/study/NCT06184750