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Find Breast Cancer Clinical Trials That Are Right For You
The clinical trials listed below are open in the U.S. for people with DCIS (stage 0), stage 1, stage 2, stage 3, or stage 4 (metastatic)
breast cancer. Clinical trials are available for people who are newly diagnosed with breast cancer, currently in treatment, experiencing
breast cancer recurrence, living with metastatic disease, as well as breast cancer survivors who have completed treatment.
Use the search box and filters to find a trial that’s right for you.
Currently viewing trials
(Last updated: June 10, 2026)
Brain Mets
BRCA1/2 (inherited)
Chemotherapy
Hormone Therapy
Leptomeningeal Disease
Radiation Oncology
Surgery
Surgery: Reconstruction
Targeted Therapy: All
Targeted Therapy: ADC
Targeted Therapy: Anti-HER2 Therapy
Targeted Therapy: CDK Inhibitors
Targeted Therapy: PARP Inhibitors
Targeted Therapy: Tumor Mutations
Targeted Therapy: Other Targeted Therapy
Vaccines and Immunotherapy
Other Treatment
Activities
Complementary and Integrative Medicine
Decision Support
Diagnosing Breast Cancer
Genetics/Family History
Having Children
Healthy/High Risk
Imaging
Lymphedema
Managing Side Effects
No Travel Required
Predicting Response to Treatment
Preventing Breast Cancer
Preventing Recurrence
Support/Education
Surveys/Interviews/Registries
AKT
ALK
AR
BARD1
BRCA1/2 (tumor)
BRIP1
CD205
CD70
CHEK2 or CHEK1
dMMR/MSI-H
ESR1
FGFR
HER2/ERBB2
HLA
MET or C-Met
NTRK
PALB2
PIK3CA or PI3K
PTEN
RAD51
RAF (including BRAF)
RAS (KRAS or NRAS)
RB
ROS1
TP53
NEAREST SITE: 353 miles
City of Hope Comprehensive Cancer Center
Duarte,CA
VISITS: 2-3 visits within 6 months
PHASE: II
NCT ID: NCT05941520
Acolbifene or Low Dose Tamoxifen to Prevent Breast Cancer in Premenopausal Women at High Risk for Breast Cancer
Phase IIA Trial of Acolbifene (20 mg) vs Low Dose Tamoxifen (5 mg) in Pre-Menopausal Women at High Risk for Development of Breast Cancer Scientific Title
- What's involved?
- What's being studied?
- How can I learn more?
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<p class="seamTextPara"> You will be randomly assigned to 1 of 2 groups: </p> <p class="seamTextPara"> <i class="seamTextEmphasis">Group 1</i> </p> <ul class="seamTextUnorderedList"> <li class="seamTextUnorderedListItem">Acolbifene, by mouth, daily for 6 months</li> <li class="seamTextUnorderedListItem">Mammogram, 2 times within 6 months</li> <li class="seamTextUnorderedListItem">Blood tests, 2 times within 6 months</li> <li class="seamTextUnorderedListItem">Breast biopsy, 2 times</li> </ul> <p class="seamTextPara"> <i class="seamTextEmphasis">Group 2</i> </p> <ul class="seamTextUnorderedList"> <li class="seamTextUnorderedListItem">Low-dose tamoxifen (Nolvadex®), by mouth, daily for 6 months</li> <li class="seamTextUnorderedListItem">Mammogram, 2 times within 6 months</li> <li class="seamTextUnorderedListItem">Blood tests, 2 times within 6 months</li> <li class="seamTextUnorderedListItem">Breast biopsy, 2 times</li></ul>
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<ul class="seamTextUnorderedList"> <li class="seamTextUnorderedListItem">High risk is defined as at least 1 of the following: abnormal biopsy; history of DCIS or LCIS (stage 0 breast cancer); high breast density; family history; and/or an ATM, BARD1, BRIP1, CDH1, CHEK2, MSH6, NBN, NF1, PTEN, PMS2, RAD51C, RAD51D, or TP53 gene mutation. You must not have a BRCA1/2 or PALB2 gene mutation.</li> <li class="seamTextUnorderedListItem">People at high risk for breast cancer may receive breast MRI, ultrasound, mammograms, mastectomy, and/or tamoxifen (Nolvadex®).</li> <li class="seamTextUnorderedListItem">Estrogen can cause the development and growth of breast cancer cells. Acolbifene and tamoxifen (Nolvadex®) hormone therapies block the use of estrogen by breast cells.</li> <li class="seamTextUnorderedListItem">The dose of tamoxifen (Nolvadex®) used in this study is four times lower than the standard dose.</li></ul>
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<ul class='seamTextUnorderedList'><li class='seamTextUnorderedListItem'>View eligibility criteria and additional trial information: <a href='https://clinicaltrials.gov/ct2/show/NCT05941520' target='_blank'>ClinicalTrials.gov</a> </li><li class='seamTextUnorderedListItem'><a href='https://www.cancer.org/cancer/types/breast-cancer/risk-and-prevention/tamoxifen-and-raloxifene-for-breast-cancer-prevention.html' target='_blank'>American Cancer Society: Tamoxifen and Raloxifene for Lowering Breast Cancer Risk</a> </li></ul>
NEAREST SITE: 752 miles
University of Arizona Cancer Center - Prevention Research Clinic
Tucson,AZ
VISITS: 4 visits within 1.5 years
PHASE: II
NCT ID: NCT06184750
Tamoxifen Hormone Therapy to Reduce Breast Density and Breast Cancer Risk for Premenopausal Women
Refining Tamoxifen Dose for Premenopausal Breast Cancer Risk Reduction (RENAISSANCE): A Phase II Single Arm Trial Scientific Title
- What's involved?
- What's being studied?
- How can I learn more?
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<p class="seamTextPara"> You will receive the following: </p> <ul class="seamTextUnorderedList"> <li class="seamTextUnorderedListItem">Tamoxifen (Nolvadex®), by mouth, daily for 6 months to 2 years</li> <li class="seamTextUnorderedListItem">Mammograms, 4 times within 1.5 years</li> <li class="seamTextUnorderedListItem">Questionnaires, 4 times within 1.5 years</li> <li class="seamTextUnorderedListItem">Blood tests</li> <li class="seamTextUnorderedListItem">Biopsy, 2 times (optional)</li></ul>
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<ul class="seamTextUnorderedList"> <li class="seamTextUnorderedListItem">Dense breasts are a risk factor for breast cancer.</li> <li class="seamTextUnorderedListItem">Tamoxifen (Nolvadex®) is a type of hormone therapy called a selective estrogen receptor modulator (SERM). It works by blocking the effects of the hormone estrogen in the breast.</li> <li class="seamTextUnorderedListItem">Tamoxifen reduces breast density, even at low doses, and is approved for the prevention of breast cancer.</li> <li class="seamTextUnorderedListItem">The researchers may change your tamoxifen dose according to changes in your breast density as seen on a mammogram.</li> <li class="seamTextUnorderedListItem">DCIS or LCIS are also known as stage 0 breast cancer.</li></ul>
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<ul class='seamTextUnorderedList'><li class='seamTextUnorderedListItem'>View eligibility criteria and additional trial information: <a href='https://clinicaltrials.gov/ct2/show/NCT06184750' target='_blank'>ClinicalTrials.gov</a> </li></ul>
NEAREST SITE: 1500 miles
University of Kansas Cancer Center
Kansas City,KS
VISITS: At least 2 visits in 6 months
PHASE: II
NCT ID: NCT06195306
Tamoxifen With or Without Omega-3 Fatty Acids to Reduce the Risk of Breast Cancer for Overweight Postmenopausal Women
Phase 2 Study of Low Dose Tamoxifen +/- High Dose Omega-3 Fatty Acids in Overweight Postmenopausal Women at Increased Risk for Breast Cancer Scientific Title
- What's involved?
- What's being studied?
- How can I learn more?
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<p class="seamTextPara"> You will be randomly assigned to 1 of 2 groups: </p> <p class="seamTextPara"> <i class="seamTextEmphasis">Group 1: Tamoxifen Alone</i> </p> <ul class="seamTextUnorderedList"> <li class="seamTextUnorderedListItem">Tamoxifen (Nolvadex®), by mouth, daily for 6 months</li> <li class="seamTextUnorderedListItem">Mammogram, 1 time</li> <li class="seamTextUnorderedListItem">Blood tests, 2 times in 6 months</li> <li class="seamTextUnorderedListItem">Questionnaires</li> </ul> <p class="seamTextPara"> <i class="seamTextEmphasis">Group 2: Tamoxifen with Omega-3 Fatty Acids</i> </p> <ul class="seamTextUnorderedList"> <li class="seamTextUnorderedListItem">Tamoxifen (Nolvadex®), by mouth, daily for 6 months</li> <li class="seamTextUnorderedListItem">Omega-3 fatty acids (Lovaza®), by mouth, daily for 6 months</li> <li class="seamTextUnorderedListItem">Mammogram, 1 time</li> <li class="seamTextUnorderedListItem">Blood tests, 2 times in 6 months</li> <li class="seamTextUnorderedListItem">Questionnaires</li></ul>
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<ul class="seamTextUnorderedList"> <li class="seamTextUnorderedListItem">Tamoxifen (Nolvadex®) is a type of hormone therapy called a selective estrogen receptor modulator (SERM). SERMs work by blocking the activity of estrogen.</li> <li class="seamTextUnorderedListItem">Tamoxifen is approved by the FDA for preventing breast cancer in women at increased risk. </li> <li class="seamTextUnorderedListItem">Omega-3 fatty acids have been shown to decrease the amount of fats made in the liver and may help prevent cancer in overweight or obese individuals.</li></ul>
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<ul class='seamTextUnorderedList'><li class='seamTextUnorderedListItem'>View eligibility criteria and additional trial information: <a href='https://clinicaltrials.gov/ct2/show/NCT06195306' target='_blank'>ClinicalTrials.gov</a> </li><li class='seamTextUnorderedListItem'><a href='https://my.clevelandclinic.org/health/treatments/9785-tamoxifen' target='_blank'>Cleveland Clinic: Tamoxifen (Nolvadex®)</a> </li></ul>
NEAREST SITE: 1615 miles
Mayo Clinic in Rochester
Rochester,MN
VISITS: Number of visits unavailable
PHASE: II
NCT ID: NCT05557877
Low-Dose Aspirin to Prevent Breast Cancer After Having a Baby
Targeted Prevention of Postpartum-Related Breast Cancer Scientific Title
- What's involved?
- What's being studied?
- How can I learn more?
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<p class="seamTextPara"> You will receive the following: </p> <ul class="seamTextUnorderedList"> <li class="seamTextUnorderedListItem">Biopsy</li> <li class="seamTextUnorderedListItem">Blood tests</li> </ul> <p class="seamTextPara"> followed by: </p> <ul class="seamTextUnorderedList"> <li class="seamTextUnorderedListItem">Low-dose aspirin, by mouth, daily</li> </ul> <p class="seamTextPara"> followed by: </p> <ul class="seamTextUnorderedList"> <li class="seamTextUnorderedListItem">Blood tests</li> <li class="seamTextUnorderedListItem">Questionnaires</li> </ul> <p class="seamTextPara"> <i class="seamTextEmphasis">Please contact research site for treatment schedule</i></p>
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<ul class="seamTextUnorderedList"> <li class="seamTextUnorderedListItem">Low-dose aspirin, a non-steroidal anti-inflammatory drug, may reduce inflammation in blood and tissue which may prevent breast cancer after having a baby.</li> <li class="seamTextUnorderedListItem">Benign breast disease is non-cancerous breast disease.</li></ul>
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<ul class='seamTextUnorderedList'><li class='seamTextUnorderedListItem'>View eligibility criteria and additional trial information: <a href='https://clinicaltrials.gov/ct2/show/NCT05557877' target='_blank'>ClinicalTrials.gov</a> </li><li class='seamTextUnorderedListItem'><a href='https://newsnetwork.mayoclinic.org/discussion/mayo-clinic-minute-aspirins-role-in-preventing-and-stopping-the-spread-of-cancer/' target='_blank'>Mayo Clinic: Aspirin and Cancer Prevention</a> </li></ul>
NEAREST SITE: 1814 miles
Rush University College of Nursing
Sugar Grove,IL
VISITS: 2 visits within 6 months
PHASE: NA
NCT ID: NCT06827704
Dance Program to Improve Physical Health and Reduce the Risk of Breast Cancer for South Asian Indian Immigrant Women
Physical Activity Targeting Metabolic Syndrome for Prevention of Breast Cancer in South Asian Indian Immigrant Women (MetS-BC) Scientific Title
- What's involved?
- What's being studied?
- How can I learn more?
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<p class="seamTextPara"> You will be randomly assigned to 1 of 4 groups: </p> <p class="seamTextPara"> <i class="seamTextEmphasis">Group 1</i> </p> <ul class="seamTextUnorderedList"> <li class="seamTextUnorderedListItem">Wear a Fitbit</li> <li class="seamTextUnorderedListItem">Treatment plan to increase physical activity</li> <li class="seamTextUnorderedListItem">Blood tests, 2 times within 6 months</li> <li class="seamTextUnorderedListItem">Body measurements, 2 times within 6 months</li> </ul> <p class="seamTextPara"> <i class="seamTextEmphasis">Group 2</i> </p> <ul class="seamTextUnorderedList"> <li class="seamTextUnorderedListItem">Bollywood-style group dance, virtual, 1-hour sessions, twice a week for 6 months</li> <li class="seamTextUnorderedListItem">Blood tests, 2 times within 6 months</li> <li class="seamTextUnorderedListItem">Body measurements, 2 times within 6 months</li> </ul> <p class="seamTextPara"> <i class="seamTextEmphasis">Group 3</i> </p> <ul class="seamTextUnorderedList"> <li class="seamTextUnorderedListItem">Wear a Fitbit</li> <li class="seamTextUnorderedListItem">Treatment plan to increase physical activity</li> <li class="seamTextUnorderedListItem">Bollywood-style group dance, virtual, 1-hour sessions, twice a week for 6 months</li> <li class="seamTextUnorderedListItem">Blood tests, 2 times within 6 months</li> <li class="seamTextUnorderedListItem">Body measurements, 2 times within 6 months</li> </ul> <p class="seamTextPara"> <i class="seamTextEmphasis">Group 4</i> </p> <ul class="seamTextUnorderedList"> <li class="seamTextUnorderedListItem">No intervention</li> <li class="seamTextUnorderedListItem">Blood tests, 2 times within 6 months</li> <li class="seamTextUnorderedListItem">Body measurements, 2 times within 6 months</li></ul>
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<ul class="seamTextUnorderedList"> <li class="seamTextUnorderedListItem">Breast cancer develops an average of 5-10 years earlier in South Asian Indian immigrant women than in white women.</li> <li class="seamTextUnorderedListItem">The risk of breast cancer is more than twice as high in South Asian Indian immigrant women with high blood pressure, diabetes, abnormal lipid levels, and obesity than in white women with these conditions.</li> <li class="seamTextUnorderedListItem">This study aims to use a culturally appropriate exercise program to improve physical activity, blood pressure, diabetes, lipid levels, and obesity to reduce the risk of breast cancer in South Asian Indian immigrant women.</li></ul>
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<ul class='seamTextUnorderedList'><li class='seamTextUnorderedListItem'>View eligibility criteria and additional trial information: <a href='https://clinicaltrials.gov/ct2/show/NCT06827704' target='_blank'>ClinicalTrials.gov</a> </li></ul>
NEAREST SITE: 2264 miles
UPMC Magee Womens Hospital
Pittsburgh,PA
VISITS: Number of visits unavailable
PHASE: I
NCT ID: NCT06218303
Vaccine to Prevent Breast Cancer for Women with ER+ DCIS
A Clinical Study of a Prototype DAA/TAA Vaccine Targeting MUC1 for Immune Interception and Prevention in Ductal Carcinoma In Situ Scientific Title
- What's involved?
- What's being studied?
- How can I learn more?
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<p class="seamTextPara"> You will be randomly assigned to 1 of 2 groups: </p> <p class="seamTextPara"> <i class="seamTextEmphasis">Group 1: Experimental</i> </p> <ul class="seamTextUnorderedList"> <li class="seamTextUnorderedListItem">MUC1 peptide vaccine with Poly ICLC (Hiltonol®), by injection, 3-4 times within 3-9 months</li> <li class="seamTextUnorderedListItem">Aromatase inhibitor, by mouth, daily</li> </ul> <p class="seamTextPara"> <i class="seamTextEmphasis">Group 2: Standard of Care</i> </p> <ul class="seamTextUnorderedList"> <li class="seamTextUnorderedListItem">Aromatase inhibitor, by mouth, daily</li></ul>
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<ul class="seamTextUnorderedList"> <li class="seamTextUnorderedListItem">Not all DCIS will progress to invasive breast cancer.</li> <li class="seamTextUnorderedListItem">Vaccines for DCIS may allow for less treatment. </li> <li class="seamTextUnorderedListItem">The MUC1 peptide vaccine is an experimental immunotherapy. The vaccine targets MUC1, which is a protein expressed by DCIS.</li> <li class="seamTextUnorderedListItem">Poly ICLC (Hiltonol®) is an immunotherapy that stimulates immune cells to go after and kill cancer cells.</li> <li class="seamTextUnorderedListItem">Anastrozole (Arimidex®), letrozole (Femara®), and exemestane (Aromasin®) are types of hormone therapy called aromatase inhibitors. Aromatase inhibitors block some production of estrogen that helps cancer grow.</li></ul>
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<ul class='seamTextUnorderedList'><li class='seamTextUnorderedListItem'>View eligibility criteria and additional trial information: <a href='https://clinicaltrials.gov/ct2/show/NCT06218303' target='_blank'>ClinicalTrials.gov</a> </li></ul>
NEAREST SITE: 2539 miles
Memorial Sloan Kettering Cancer Center Basking Ridge (Limited Protocol Activities)
Basking Ridge,NJ
VISITS: 4 visits over 5 years
PHASE: NA
NCT ID: NCT07294703
Understanding Genetic and Lifestyle Factors That Affect Breast Cancer Risk
Genomic and Non-Genomic Factors Associated With Breast Cancer Risk Factors and Outcomes Scientific Title
- What's involved?
- What's being studied?
- How can I learn more?
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<p class="seamTextPara"> You will provide the following: </p> <ul class="seamTextUnorderedList"> <li class="seamTextUnorderedListItem">Blood and tissue samples</li> <li class="seamTextUnorderedListItem">Questionnaires</li></ul>
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<ul class="seamTextUnorderedList"> <li class="seamTextUnorderedListItem">The goal of this study is to understand why breast cancer risk and outcomes, including recurrence, may be different for people with different backgrounds by looking at genetic information, blood and tissue samples, and survey responses.</li> <li class="seamTextUnorderedListItem">Collecting samples of blood and tissue from patients with and without breast cancer can help determine which factors may be linked to breast cancer risk and outcomes.</li> <li class="seamTextUnorderedListItem">This is a research only study and does not provide cancer treatment.</li></ul>
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<ul class='seamTextUnorderedList'><li class='seamTextUnorderedListItem'>View eligibility criteria and additional trial information: <a href='https://clinicaltrials.gov/ct2/show/NCT07294703' target='_blank'>ClinicalTrials.gov</a> </li><li class='seamTextUnorderedListItem'><a href='https://www.cancer.org/cancer/types/breast-cancer/risk-and-prevention/genetic-testing.html' target='_blank'>American Cancer Society: Genetic Counseling and Testing for Breast Cancer Risk</a> </li><li class='seamTextUnorderedListItem'><a href='https://www.breastcancer.org/genetic-testing' target='_blank'>Breastcancer.org: Genetic Testing for Breast Cancer</a> </li></ul>
NEAREST SITE: 2693 miles
Dana Farber Cancer Institute
Boston,MA
VISITS: At least 2 visits within 4 months
PHASE: NA
NCT ID: NCT06322888
Exercise to Reduce the Risk of Breast Cancer for Women With Dense Breasts
Resistance and Aerobic Exercise for Prevention in Women With Dense Breasts (REP-D) Scientific Title
- What's involved?
- What's being studied?
- How can I learn more?
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<p class="seamTextPara"> You will be randomly assigned to 1 of 2 groups: </p> <p class="seamTextPara"> <i class="seamTextEmphasis">Group 1: Experimental</i> </p> <ul class="seamTextUnorderedList"> <li class="seamTextUnorderedListItem">Exercise program, in person or virtual, 3 times every week for 3 months</li> <li class="seamTextUnorderedListItem">Exercise journal</li> <li class="seamTextUnorderedListItem">Fitbit</li> <li class="seamTextUnorderedListItem">Biopsy, 2 times within 3 months</li> <li class="seamTextUnorderedListItem">Blood test, 2 times within 3 months</li> <li class="seamTextUnorderedListItem">Questionnaires</li> </ul> <p class="seamTextPara"> <i class="seamTextEmphasis">Group 2 : Control</i> </p> <ul class="seamTextUnorderedList"> <li class="seamTextUnorderedListItem">Biopsy, 2 times within 3 months</li> <li class="seamTextUnorderedListItem">Blood test, 2 times within 3 months</li> <li class="seamTextUnorderedListItem">Questionnaires</li> </ul> <p class="seamTextPara"> followed 3 months later by: </p> <ul class="seamTextUnorderedList"> <li class="seamTextUnorderedListItem">Exercise program, 3 months (optional)</li></ul>
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<ul class="seamTextUnorderedList"> <li class="seamTextUnorderedListItem">Greater physical activity is associated with a lower risk of breast cancer.</li> <li class="seamTextUnorderedListItem">Exercise may change markers in blood and breast tissue that play a role in breast cancer development.</li> <li class="seamTextUnorderedListItem">If you are in group 1, the exercise program includes aerobic and resistance training exercise with a certified exercise trainer.</li> <li class="seamTextUnorderedListItem">If you are in group 1, a FitBit activity tracker, resistance bands, hand weights, and stationary bike will be provided to you. Hand weights will be returned at end of study.</li></ul>
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<ul class='seamTextUnorderedList'><li class='seamTextUnorderedListItem'>View eligibility criteria and additional trial information: <a href='https://clinicaltrials.gov/ct2/show/NCT06322888' target='_blank'>ClinicalTrials.gov</a> </li></ul>
