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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 13, 2026 Report an issue

ClinicalTrials.gov public records Last synced Oct 13, 2026, 5:09 AM EDT

Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.

Official matching trials
678
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12
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Recently updated
Condition scope
Breast Cancer
Additional filters apply within this condition.

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.

Terms that often appear in related listings
triple-negative HER2-positive hormone receptor-positive metastatic breast cancer

These describe how studies tend to be titled and grouped on ClinicalTrials.gov — they are search vocabulary, not medical guidance.

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Showing 37–48 of 678 matching trials for Breast Cancer.
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Live official records

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Active, not recruiting Phase 3 Interventional Results available

Exemestane With or Without Entinostat in Treating Patients With Recurrent Hormone Receptor-Positive Breast Cancer That is Locally Advanced or Metastatic

NCT02115282
View directory record Official record
Conditions
Anatomic Stage III Breast Cancer AJCC v8, Anatomic Stage IV Breast Cancer AJCC v8, Breast Adenocarcinoma, HER2/Neu Negative, Locally Advanced Breast Carcinoma, Metastatic Breast Carcinoma, Recurrent Breast Carcinoma
Interventions
Biospecimen Collection, Computed Tomography, Entinostat, Exemestane, Goserelin, Goserelin Acetate, Magnetic Resonance Imaging, Placebo Administration, Quality-of-Life Assessment
Procedure · Drug · Other
Lead sponsor
National Cancer Institute (NCI)
NIH
Eligibility
18 Years and older
Enrollment
608 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2027
U.S. locations
652
States / cities
Birmingham, Alabama • Jonesboro, Arkansas • Carmichael, California + 460 more
Source: ClinicalTrials.gov public record
Updated Oct 1, 2026 · Synced Oct 13, 2026, 5:09 AM EDT
Active, not recruiting Phase 3 Interventional Results available

Hormone Therapy With or Without Combination Chemotherapy in Treating Women Who Have Undergone Surgery for Node-Negative Breast Cancer (The TAILORx Trial)

NCT00310180
View directory record Official record
Conditions
Breast Adenocarcinoma, Hormone Receptor Positive, Stage IA Breast Cancer AJCC v7, Stage IB Breast Cancer AJCC v7, Stage IIA Breast Cancer AJCC v6 and v7, Stage IIB Breast Cancer AJCC v6 and v7, Stage IIIB Breast Cancer AJCC v7
Interventions
Anastrozole, Exemestane, Laboratory Biomarker Analysis, Letrozole, Quality-of-Life Assessment, Radiation Therapy, Tamoxifen Citrate
Drug · Other · Radiation
Lead sponsor
National Cancer Institute (NCI)
NIH
Eligibility
18 Years to 75 Years · Female only
Enrollment
10,273 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2030
U.S. locations
1160
States / cities
Anniston, Alabama • Birmingham, Alabama • Mobile, Alabama + 723 more
Source: ClinicalTrials.gov public record
Updated Oct 1, 2026 · Synced Oct 13, 2026, 5:09 AM EDT
Recruiting Phase 2 Interventional

A Study of Alisertib in Combination With Endocrine Therapy in Patients With HR-positive, HER2-negative Recurrent or Metastatic Breast Cancer

NCT06369285
View directory record Official record
Conditions
Hormone Receptor Positive HER-2 Negative Breast Cancer, Metastatic Breast Cancer, Recurrent Breast Cancer
Interventions
Alisertib, Endocrine therapy
Drug
Lead sponsor
Puma Biotechnology, Inc.
Industry
Eligibility
18 Years and older
Enrollment
225 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2029
U.S. locations
35
States / cities
Birmingham, Alabama • Phoenix, Arizona • Beverly Hills, California + 28 more
Source: ClinicalTrials.gov public record
Updated Oct 1, 2026 · Synced Oct 13, 2026, 5:09 AM EDT
Active, not recruiting Phase 3 Interventional Results available

Tamoxifen Citrate, Letrozole, Anastrozole, or Exemestane With or Without Chemotherapy in Treating Patients With Invasive RxPONDER Breast Cancer

NCT01272037
View directory record Official record
Conditions
Breast Ductal Carcinoma In Situ, Invasive Breast Carcinoma, Multicentric Breast Carcinoma, Multifocal Breast Carcinoma, Synchronous Bilateral Breast Carcinoma
Interventions
Anastrozole, Exemestane, Laboratory Biomarker Analysis, Letrozole, Quality-of-Life Assessment, Systemic Chemotherapy, Tamoxifen Citrate
Drug · Other
Lead sponsor
National Cancer Institute (NCI)
NIH
Eligibility
18 Years and older · Female only
Enrollment
5,018 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2027
U.S. locations
1435
States / cities
Anniston, Alabama • Birmingham, Alabama • Mobile, Alabama + 881 more
Source: ClinicalTrials.gov public record
Updated Oct 1, 2026 · Synced Oct 13, 2026, 5:09 AM EDT
Recruiting Phase 2 Interventional

Abemaciclib and Endocrine Therapy in Older Patients With Breast Cancer.

NCT04305834
View directory record Official record
Conditions
Anatomic Stage IV Breast Cancer AJCC v8, Hormone Receptor Positive Breast Carcinoma, Metastatic Breast Carcinoma, Prognostic Stage IV Breast Cancer AJCC v8
Interventions
Abemaciclib, Questionnaire Administration
Drug · Other
Lead sponsor
City of Hope Medical Center
Other
Eligibility
70 Years and older
Enrollment
43 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2027
U.S. locations
6
States / cities
Duarte, California • Irvine, California • Long Beach, California + 3 more
Source: ClinicalTrials.gov public record
Updated Oct 1, 2026 · Synced Oct 13, 2026, 5:09 AM EDT
Recruiting Phase 2 Interventional

Evaluation of Alternative Site Goserelin Acetate Injection for Ovarian Function Suppression (OFS) in Local and Locally Advanced Premenopausal Hormone Receptor Positive Breast Cancer Patients

NCT07460752
View directory record Official record
Conditions
Anatomic Stage I Breast Cancer AJCC v8, Anatomic Stage II Breast Cancer AJCC v8, Anatomic Stage III Breast Cancer AJCC v8, Locally Advanced Hormone Receptor-Positive Breast Carcinoma
Interventions
Biospecimen Collection, Goserelin Acetate, Questionnaire Administration
Procedure · Drug · Other
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years to 50 Years · Female only
Enrollment
98 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2029
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Oct 1, 2026 · Synced Oct 13, 2026, 5:09 AM EDT
Active, not recruiting Phase 3 Interventional

Additional Support Program Via Text Messaging and Telephone-Based Counseling for Breast Cancer Patients Receiving Hormonal Therapy

NCT04379570
View directory record Official record
Conditions
Anatomic Stage I Breast Cancer AJCC v8, Anatomic Stage II Breast Cancer AJCC v8, Anatomic Stage III Breast Cancer AJCC v8, HER2 Negative Breast Carcinoma, Hormone Receptor Positive Breast Carcinoma, Invasive Breast Carcinoma, Prognostic Stage I Breast Cancer AJCC v8, Prognostic Stage II Breast Cancer AJCC v8, Prognostic Stage III Breast Cancer AJCC v8
Interventions
Educational Intervention, Text Message-based Navigation Intervention, Motivational Interviewing, Best Practice, Questionnaire Administration, Quality-of-Life Assessment
Other · Behavioral
Lead sponsor
Alliance for Clinical Trials in Oncology
Other
Eligibility
18 Years and older · Female only
Enrollment
1,167 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2026
U.S. locations
526
States / cities
Birmingham, Alabama • Fairbanks, Alaska • Gilbert, Arizona + 406 more
Source: ClinicalTrials.gov public record
Updated Oct 1, 2026 · Synced Oct 13, 2026, 5:09 AM EDT
Recruiting Phase 1Phase 2 Interventional

A Study of Patritumab Deruxtecan (HER3-DXd) in Combination With Trastuzumab Deruxtecan (T-DXd) in Participants With HR-Positive, HER2-Low or HER2-Ultralow Unresectable or Metastatic Breast Cancer

NCT07701941
View directory record Official record
Conditions
Hormone Receptor Positive, HER2-low or HER2-ultralow, Unresectable or Metastatic Breast Cancer
Interventions
Patritumab deruxtecan, Trastuzumab deruxtecan
Drug
Lead sponsor
Daiichi Sankyo
Industry
Eligibility
18 Years and older
Enrollment
220 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2032
U.S. locations
12
States / cities
Los Angeles, California • Stanford, California • Aurora, Colorado + 8 more
Source: ClinicalTrials.gov public record
Updated Oct 1, 2026 · Synced Oct 13, 2026, 5:09 AM EDT
Recruiting Phase 1Phase 2 Interventional

PRE-ISPY Phase I/II Oncology Platform Program

NCT05868226
View directory record Official record
Conditions
HER2-positive Breast Cancer, Metastatic Cancer, Metastatic Breast Cancer, Metastatic, HER2-positive Metastatic Breast Cancer, HER2 Mutation-Related Tumors, HER-2 Protein Overexpression, HER2-negative Breast Cancer, Triple Negative Breast Cancer, HR Positive, Hormone Receptor-positive Breast Cancer, Estrogen Receptor Positive Tumor, Progesterone Receptor-positive Breast Cancer, Hormone Receptor Negative Breast Carcinoma, Solid Tumor, Solid Tumor, Adult, Solid Carcinoma, HER2 Low Breast Cancer, HER2 Low Breast Carcinoma, ER Positive Breast Cancer, PR-positive Breast Cancer, Minimal Residual Disease, Colo-rectal Cancer, Colon Cancer, Rectal Cancer, ctDNA Monitoring, Colorectal Neoplasms, Colonic Neoplasms, Rectal Neoplasms, Neoplasm, Residual, Adenocarcinoma of Colon, Adenocarcinoma
Interventions
ALX148, Fam-Trastuzumab Deruxtecan-Nxki, Zanidatamab, Tucatinib, TTX-MC138
Drug
Lead sponsor
QuantumLeap Healthcare Collaborative
Other
Eligibility
18 Years and older
Enrollment
280 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2031
U.S. locations
10
States / cities
Birmingham, Alabama • Phoenix, Arizona • Aurora, Colorado + 7 more
Source: ClinicalTrials.gov public record
Updated Sep 30, 2026 · Synced Oct 13, 2026, 5:09 AM EDT
Active, not recruiting Phase 3 Interventional

Ovarian Suppression Evaluating Subcutaneous Leuprolide Acetate in Breast Cancer

NCT04906395
View directory record Official record
Conditions
Breast Cancer
Interventions
TOL2506, Tamoxifen, Letrozole Tablets, Anastrozole Tablets, Exemestane Tablets
Drug
Lead sponsor
Tolmar Inc.
Industry
Eligibility
18 Years to 49 Years
Enrollment
250 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2026
U.S. locations
17
States / cities
Greenbrae, California • Parker, Colorado • Chicago, Illinois + 14 more
Source: ClinicalTrials.gov public record
Updated Sep 29, 2026 · Synced Oct 13, 2026, 5:09 AM EDT
Active, not recruiting Phase 3 Interventional

A Comparative Study of AZD9833 Plus Palbociclib Versus Anastrozole Plus Palbociclib in Patients With ER-Positive HER2 Negative Breast Cancer Who Have Not Received Any Systemic Treatment for Advanced Disease

NCT04711252
View directory record Official record
Conditions
ER-Positive HER2-Negative Breast Cancer
Interventions
AZD9833, Anastrozole, Anastrozole placebo, AZD9833 placebo, Palbociclib, Luteinizing hormone-releasing hormone (LHRH) agonist
Drug
Lead sponsor
AstraZeneca
Industry
Eligibility
18 Years to 130 Years
Enrollment
1,371 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2029
U.S. locations
30
States / cities
Mobile, Alabama • Springdale, Arkansas • Harbor City, California + 25 more
Source: ClinicalTrials.gov public record
Updated Sep 28, 2026 · Synced Oct 13, 2026, 5:09 AM EDT
Recruiting Phase 1 Interventional

BGB-43395 Alone or as Part of Combination Therapies in Participants With Breast Cancer and Other Advanced Solid Tumors

NCT06120283
View directory record Official record
Conditions
Advanced Solid Tumor, Advanced Breast Cancer, Metastatic Breast Cancer, Hormone-receptor-positive Breast Cancer, Hormone Receptor Positive Breast Carcinoma, Hormone Receptor Positive Malignant Neoplasm of Breast, HER2-negative Breast Cancer, Hormone Receptor Positive HER-2 Negative Breast Cancer
Interventions
BGB-43395, Fulvestrant, Letrozole, Elacestrant, Anti-Diarrheal Agent
Drug
Lead sponsor
BeOne Medicines
Industry
Eligibility
18 Years and older
Enrollment
433 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2029
U.S. locations
9
States / cities
Denver, Colorado • Lake Mary, Florida • Detroit, Michigan + 6 more
Source: ClinicalTrials.gov public record
Updated Sep 28, 2026 · Synced Oct 13, 2026, 5:09 AM EDT

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.