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 November 15, 2026 Report an issue

ClinicalTrials.gov public records Last synced Nov 15, 2026, 7:32 AM EST

All trial information on this site comes from the official ClinicalTrials.gov public API (clinicaltrials.gov/api/v2), run by the U.S. National Library of Medicine. We only display that public information; we do not add opinions, endorsements, or any other intent. Always review the official ClinicalTrials.gov record for the latest information.

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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.

Showing 889–900 of 7,089 matching trials for Breast Cancer.

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Conditions: Breast Cancer, Early-stage Breast Cancer
Interventions: Fasting; Behavioral
Lead sponsor: Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins; Other
Eligibility: 18 Years and older · Female only
Enrollment: 30 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2024 – 2029
U.S. locations: 1
States / cities: Washington D.C., District of Columbia

Conditions: Breast Cancer, Breast Carcinoma, Cancer of the Breast, Malignant Neoplasm of Breast
Interventions: Expression Networks for highLIGHting Tumor vulnerabilities (ENLIGHT), TruSight(R) Oncology 500, TruSeq Matched Tumor Normal Whole Exome Sequencing Assay; Device
Lead sponsor: National Cancer Institute (NCI); NIH
Eligibility: 18 Years to 120 Years
Enrollment: 175 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2026 – 2029
U.S. locations: 1
States / cities: Bethesda, Maryland

Conditions: Anatomic Stage 0 Breast Cancer AJCC v8, Anatomic Stage I Breast Cancer AJCC v8, Anatomic Stage IA Breast Cancer AJCC v8, Anatomic Stage IB Breast Cancer AJCC v8, Anatomic Stage II Breast Cancer AJCC v8, Anatomic Stage IIA Breast Cancer AJCC v8, Anatomic Stage IIB Breast Cancer AJCC v8, Anatomic Stage III Breast Cancer AJCC v8, Anatomic Stage IIIA Breast Cancer AJCC v8, Anatomic Stage IIIB Breast Cancer AJCC v8, Anatomic Stage IIIC Breast Cancer AJCC v8, Prognostic Stage 0 Breast Cancer AJCC v8, Prognostic Stage I Breast Cancer AJCC v8, Prognostic Stage IA Breast Cancer AJCC v8, Prognostic Stage IB Breast Cancer AJCC v8, Prognostic Stage II Breast Cancer AJCC v8, Prognostic Stage IIA Breast Cancer AJCC v8, Prognostic Stage IIB Breast Cancer AJCC v8, Prognostic Stage III Breast Cancer AJCC v8, Prognostic Stage IIIA Breast Cancer AJCC v8, Prognostic Stage IIIB Breast Cancer AJCC v8, Prognostic Stage IIIC Breast Cancer AJCC v8
Interventions: Behavioral, Psychological or Informational Intervention, Best Practice, Quality-of-Life Assessment, Questionnaire Administration; Other
Lead sponsor: M.D. Anderson Cancer Center; Other
Eligibility: 18 Years and older · Female only
Enrollment: 256 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2021 – 2028
U.S. locations: 1
States / cities: Houston, Texas

Conditions: Breast Cancer, HER2-positive Breast Cancer
Interventions: Paclitaxel, Nab-paclitaxel, Docetaxel, Trastuzumab, Pertuzumab; Drug
Lead sponsor: University of Illinois Chicago; Other
Eligibility: 18 Years and older
Enrollment: 28 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2024 – 2028
U.S. locations: 1
States / cities: Chicago, Illinois

Conditions: Advanced Solid Tumors, HER2-positive Breast Cancer
Interventions: ZN-A-1041, ZN-A-1041 + T-DM1 3.6 mg/kg iv. for Phase 1b, ZN-A-1041 + T-Dxd 5.4 mg/kg iv. for Phase 1b, ZN-A-1041 + PHESGO / Herceptin plus Perjeta injection for Phase 1b, ZN-A-1041 + T-DM1 3.6 mg/kg iv. for Phase 1c, ZN-A-1041 + T-Dxd 5.4 mg/kg iv. for Phase 1c, ZN-A-1041 + PHESGO / Herceptin plus Perjeta injection for Phase 1c; Drug
Lead sponsor: Hoffmann-La Roche; Industry
Eligibility: 18 Years and older
Enrollment: 210 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2020 – 2027
U.S. locations: 8
States / cities: Tucson, Arizona • Cerritos, California • San Francisco, California + 5 more

Conditions: Uterine Neoplasms, Uterine Cervical Neoplasms, Biliary Tract Neoplasms, Urologic Neoplasms, Carcinoma, Non-Small-Cell Lung, HER2 Mutations Breast Neoplasms
Interventions: tucatinib, trastuzumab, fulvestrant; Drug
Lead sponsor: Seagen, a wholly owned subsidiary of Pfizer; Industry
Eligibility: 18 Years and older
Enrollment: 217 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2021 – 2026
U.S. locations: 76
States / cities: Phoenix, Arizona • Tempe, Arizona • Tucson, Arizona + 47 more

Conditions: HER2-positive Metastatic Breast Cancer, Central Nervous System Metastases
Interventions: ATEZOLIZUMAB, PERTUZUMAB, TRASTUZUMAB; Drug
Lead sponsor: Nancy Lin, MD; Other
Eligibility: 18 Years and older
Enrollment: 19 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2018 – 2026
U.S. locations: 2
States / cities: Chicago, Illinois • Boston, Massachusetts

Conditions: Advanced or Metastatic Breast Cancer
Interventions: Ibrance; Drug
Lead sponsor: Pfizer; Industry
Eligibility: 18 Years and older · Female only
Enrollment: 1 participant
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2025
U.S. locations: 1
States / cities: New York, New York

Conditions: Anatomic Stage III Breast Cancer AJCC v8, Anatomic Stage IV Breast Cancer AJCC v8, BRCA-Associated Malignant Neoplasm, BRCA Hereditary Ovarian Carcinoma, Metastatic BRCA Hereditary Breast Carcinoma, Metastatic Breast Carcinoma, Metastatic Fallopian Tube Carcinoma, Metastatic Malignant Solid Neoplasm, Metastatic Ovarian Carcinoma, Metastatic Pancreatic Carcinoma, Metastatic Primary Peritoneal Carcinoma, Prognostic Stage III Breast Cancer AJCC v8, Prognostic Stage IV Breast Cancer AJCC v8, Stage III Fallopian Tube Cancer AJCC v8, Stage III Ovarian Cancer AJCC v8, Stage III Pancreatic Cancer AJCC v8, Stage III Primary Peritoneal Cancer AJCC v8, Stage IV Fallopian Tube Cancer AJCC v8, Stage IV Ovarian Cancer AJCC v8, Stage IV Pancreatic Cancer AJCC v8, Stage IV Primary Peritoneal Cancer AJCC v8, Unresectable Breast Carcinoma, Unresectable Fallopian Tube Carcinoma, Unresectable Malignant Solid Neoplasm, Unresectable Ovarian Carcinoma, Unresectable Pancreatic Carcinoma, Unresectable Primary Peritoneal Carcinoma
Interventions: Dostarlimab, Niraparib, Biopsy, Biospecimen Collection, Computed Tomography, Magnetic Resonance Imaging; Biological · Drug · Procedure
Lead sponsor: University of Washington; Other
Eligibility: 18 Years and older
Enrollment: 18 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2021 – 2027
U.S. locations: 1
States / cities: Seattle, Washington

Conditions: Breast Carcinoma
Interventions: QT Ultrasound Breast Scanner, Questionnaire Administration; Device · Other
Lead sponsor: Mayo Clinic; Other
Eligibility: 18 Years and older · Female only
Enrollment: 26 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2025
U.S. locations: 1
States / cities: Rochester, Minnesota

Conditions: Anatomic Stage I Breast Cancer AJCC v8, Anatomic Stage II Breast Cancer AJCC v8, Anatomic Stage III Breast Cancer AJCC v8, Invasive Breast Carcinoma, Localized Estrogen Receptor-Positive Breast Carcinoma, Localized Human Epidermal Growth Factor Receptor (HER2)-Negative Breast Carcinoma
Interventions: Abemaciclib, Biospecimen Collection, Imlunestrant, Questionnaire Administration, Radiologic Imaging Procedure; Drug · Procedure · Other
Lead sponsor: Jonsson Comprehensive Cancer Center; Other
Eligibility: 18 Years and older
Enrollment: 42 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2026 – 2031
U.S. locations: 1
States / cities: Los Angeles, California

Conditions: Solid Tumor, Adult, Epithelial Ovarian Cancer, Small Cell Lung Carcinoma, Breast Cancer, Colorectal Cancer, Pancreas Cancer, Appendix Cancer, Non-small Cell Lung Cancer, Gastric Cancer, Esophagus Cancer, Urothelial Carcinoma, Sarcoma
Interventions: CBX-12; Drug
Lead sponsor: Cybrexa Therapeutics; Industry
Eligibility: 18 Years and older
Enrollment: 69 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2021 – 2025
U.S. locations: 4
States / cities: New Haven, Connecticut • Austin, Texas • Houston, Texas + 1 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.

Breast Cancer clinical trials

How Breast Cancer studies are organized in the registry

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Live official records

Gut Microbiome, Adverse Effects, and Markers Through MEtabolic Reprogramming

A Synthetic Lethality-Focused Algorithm to Identify Therapeutic Options in Advanced Metastatic Breast Cancer (SYNTHESIS-Breast)

Culturally Based Brief Expressive Writing Intervention for the Improvement of Health in Chinese Immigrant Stage 0-III Breast Cancer Survivors, Writing to Heal Study

BRE-10: Biomarker Optimization of Neoadjuvant Therapy in Breast Cancer

A Phase 1 Trial of ZN-A-1041 Enteric Capsules or Combination in Participants With Human Epidermal Growth Factor Receptor 2 (HER2)-Positive Advanced Solid Tumors

Basket Study of Tucatinib and Trastuzumab in Solid Tumors With HER2 Alterations

Atezolizumab + Pertuzumab + Trastuzumab In CNS Mets In BC

A Study to Understand the Patients Confirmed to Have Advanced or Metastatic Breast Cancer and Receiving Palbociclib Treatment Using a Real-world Database

Niraparib and TSR-042 for the Treatment of BRCA-Mutated Unresectable or Metastatic Breast, Pancreas, Ovary, Fallopian Tube, or Primary Peritoneal Cancer

Quantitative Transmission Imaging Compared With MRI as Supplemental Screening for High Lifetime Risk of Breast Cancer

Imlunestrant and Abemaciclib for the Treatment of Estrogen Receptor Positive Breast Cancer in Patients With Minimal Residual Disease, MIRI Trial

Study of CBX-12 in Subjects With Advanced or Metastatic Refractory Solid Tumors

About this Breast Cancer clinical trials directory page