- 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
- Endoxifen Hydrochloride, Laboratory Biomarker Analysis, Pharmacological Study, Tamoxifen Citrate
- Drug · Other
- Lead sponsor
- National Cancer Institute (NCI)
- NIH
- Eligibility
- 18 Years and older · Female only
- Enrollment
- 81 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2015 – 2027
- U.S. locations
- 559
- States / cities
- Mobile, Alabama • Anchorage, Alaska • Fairbanks, Alaska + 356 more
Condition Directory
Breast Cancer clinical trials
Directory of U.S. ClinicalTrials.gov public records for Breast Cancer. Browse Breast Cancer recruiting trials, filter by phase, sponsor, location, or intervention, and open the official ClinicalTrials.gov study record for each result.
By Clinical Trials Finder Guidance last reviewed June 10, 2026 Data synced October 26, 2026 Report an issue
Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.
Official matching trials
7073
Shown on this page
12
Local recruiting
416
Local phase groups
6
These results were retrieved from the live ClinicalTrials.gov registry. Filters and sort order apply to this result list.
How Breast Cancer studies are organized in the registry
Breast cancer listings are usually subtype-specific: receptor status appears directly in titles and condition fields, so subtype terms narrow results far better than stage words alone. Many studies also restrict to either early-stage or metastatic settings, which is visible in the title or eligibility section of the official record.
- 55% of the 761 locally indexed Breast Cancer records are currently marked recruiting.
- The most common phase group in the local index is Not applicable (257 records).
- The most frequent sponsor is Memorial Sloan Kettering Cancer Center (77 records).
- The most listed study location is New York, New York (195 records).
Terms that often appear in related listings
These describe how studies tend to be titled and grouped on ClinicalTrials.gov — they are search vocabulary, not medical guidance.
Showing 1–12 of 7,073 matching trials for Breast Cancer.
Live ClinicalTrials.gov results.
Phase distribution
Not applicable 257
Phase 2 209
Phase 1 133
Phase 3 57
Early Phase 1 11
Phase 4 9
Top locations
Top sponsors
Top therapies
Live official records
Open in full search- Conditions
- Breast Cancer, Diabetes, Colon Cancer, Cardiovascular Disease
- Interventions
- Family Health History
- Behavioral
- Lead sponsor
- National Human Genome Research Institute (NHGRI)
- NIH
- Eligibility
- 18 Years and older
- Enrollment
- 498 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- Started 2007
- U.S. locations
- 1
- States / cities
- Houston, Texas
- Conditions
- Breast Cancer
- Interventions
- GDC-4198, Giredestrant, Abemaciclib
- Drug
- Lead sponsor
- Genentech, Inc.
- Industry
- Eligibility
- 18 Years and older
- Enrollment
- 285 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2025 – 2028
- U.S. locations
- 33
- States / cities
- Huntsville, Alabama • Tucson, Arizona • Duarte, California + 29 more
- Conditions
- Breast Cancer
- Interventions
- Study Device Arm
- Combination Product
- Lead sponsor
- Lumicell, Inc.
- Industry
- Eligibility
- 18 Years and older · Female only
- Enrollment
- 406 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2019 – 2022
- U.S. locations
- 14
- States / cities
- Mobile, Alabama • Scottsdale, Arizona • Palo Alto, California + 11 more
- Conditions
- HER2-positive Breast Cancer, Breast Cancer
- Interventions
- HER2-targeted therapy, Tamoxifen, No Radiation Therapy
- Drug · Radiation
- Lead sponsor
- Memorial Sloan Kettering Cancer Center
- Other
- Eligibility
- 18 Years and older
- Enrollment
- 136 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2026 – 2031
- U.S. locations
- 7
- States / cities
- Basking Ridge, New Jersey • Middletown, New Jersey • Montvale, New Jersey + 4 more
- Conditions
- Familial Ovarian Cancer, Familial Breast Cancer, BRCA1-associate Malignancies, BRCA2-associated Malignancies
- Interventions
- Not listed
- Lead sponsor
- National Cancer Institute (NCI)
- NIH
- Eligibility
- 18 Years to 100 Years
- Enrollment
- 377 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- Started 2002
- U.S. locations
- 1
- States / cities
- Bethesda, Maryland
- Conditions
- Breast Cancer, Survivorship, Pain, Postoperative
- Interventions
- Dance Program
- Behavioral
- Lead sponsor
- Dana-Farber Cancer Institute
- Other
- Eligibility
- 18 Years and older · Female only
- Enrollment
- 28 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2025 – 2027
- U.S. locations
- 1
- States / cities
- Boston, Massachusetts
- Conditions
- Breast Cancer
- Interventions
- Inavolisib, Ribociclib, Letrozole, Giredestrant
- Drug
- Lead sponsor
- Hoffmann-La Roche
- Industry
- Eligibility
- 18 Years and older · Female only
- Enrollment
- 120 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2025 – 2027
- U.S. locations
- 6
- States / cities
- Los Angeles, California • Orange, California • Germantown, Tennessee + 3 more
- Conditions
- Breast Neoplasms, Colorectal Neoplasms, Prostate Neoplasm, Endometrial Neoplasms, Neoplasm Metastasis, Stomach Neoplasms, Esophageal Neoplasms
- Interventions
- LY4257496, Standard of Care Anticancer Therapies, LY4257529
- Drug · Diagnostic Test
- Lead sponsor
- Eli Lilly and Company
- Industry
- Eligibility
- 18 Years and older
- Enrollment
- 421 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2025 – 2035
- U.S. locations
- 16
- States / cities
- Duarte, California • Santa Monica, California • Stanford, California + 11 more
- Conditions
- Anatomic Stage II Breast Cancer AJCC v8, Anatomic Stage IIIA Breast Cancer AJCC v8, Anatomic Stage IIIC Breast Cancer AJCC v8, Estrogen Receptor-Positive Breast Carcinoma, HER2-Negative Breast Carcinoma
- Interventions
- Anastrozole, Biospecimen Collection, Bone Scan, Chemotherapy, Computed Tomography, Exemestane, Letrozole, Oncotype DX Breast Cancer Assay, Positron Emission Tomography, Ribociclib Succinate
- Drug · Procedure
- Lead sponsor
- National Cancer Institute (NCI)
- NIH
- Eligibility
- 18 Years and older
- Enrollment
- 1,978 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2026 – 2029
- U.S. locations
- 222
- States / cities
- Jonesboro, Arkansas • Auburn, California • Berkeley, California + 183 more
- Conditions
- Solid Tumor, Adult, Colorectal Cancer, Non Small Cell Lung Cancer, Pancreatic Cancer, CRC, NSCLC, Pancreas Cancer, Mesothelioma, Ovarian Cancer, Ovarian Neoplasms, Ovarian Carcinoma, Mesothelioma, Malignant, Mesothelioma; Lung, Cancer, Triple Negative Breast Cancer (TNBC), Renal Cell Carcinoma (Kidney Cancer), Head and Neck Squamous Cell Carcinoma HNSCC
- Interventions
- Apheresis, Next Generation Sequencing (NGS), Long Range NGS HLA typing
- Other · Diagnostic Test
- Lead sponsor
- A2 Biotherapeutics Inc.
- Industry
- Eligibility
- 18 Years and older
- Enrollment
- 500 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2021 – 2029
- U.S. locations
- 16
- States / cities
- Gilbert, Arizona • Phoenix, Arizona • Duarte, California + 13 more
- Conditions
- Breast Cancer
- Interventions
- Inavolisib, Fulvestrant, Alpelisib, Bupropion, Omeprazole, Midazolam
- Drug
- Lead sponsor
- Hoffmann-La Roche
- Industry
- Eligibility
- 18 Years and older
- Enrollment
- 420 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2023 – 2029
- U.S. locations
- 39
- States / cities
- Greenbrae, California • Los Alamitos, California • Los Angeles, California + 32 more
About this Breast Cancer clinical trials directory page
- What this page lists
- U.S. ClinicalTrials.gov public records that list Breast Cancer as a study condition, including recruiting, not yet recruiting, and active not recruiting trials across phase 1, phase 2, and phase 3.
- How to narrow results
- Use the filters above to scope by intervention, sponsor, city, state, recruitment status, phase, study type, healthy volunteer eligibility, sex, age, or NCT ID within Breast Cancer.
- Where the data comes from
- Records are sourced from the official ClinicalTrials.gov public API. Each result links back to the official study page, which is the source of truth for eligibility, enrollment, and contact information.
- What this page does not do
- No medical advice, eligibility judgments, treatment recommendations, ranking of trials by quality, or AI-generated medical summaries.
Related: all condition pages, browse by drug or therapy, browse by U.S. city, browse by sponsor, or open the full search for Breast Cancer.