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 15, 2026 Report an issue

ClinicalTrials.gov public records Last synced Oct 15, 2026, 12:47 PM 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

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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 181–192 of 1,131 matching trials for Breast Cancer.

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Conditions: PIK3CA Mutations, Advanced Solid Tumors, Adult, Endometrial Cancer, HR Positive/HER-2 Negative Breast Cancer, HER2-low Breast Cancer
Interventions: CGT6297; Drug
Lead sponsor: Cogent Biosciences, Inc.; Industry
Eligibility: 18 Years and older
Enrollment: 90 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2026 – 2029
U.S. locations: 11
States / cities: Scottsdale, Arizona • Los Angeles, California • Denver, Colorado + 8 more

Conditions: Estrogen-receptor-positive Breast Cancer, Metastatic Breast Cancer, Breast Cancer, Hormone Receptor Positive Breast Cancer, Human Epidermal Growth Factor 2 Negative Carcinoma of Breast, HER2- Breast Cancer, ESR1 Gene Mutation, ER Wildtype, Breast Neoplasms
Interventions: Capecitabine, Elacestrant; Drug
Lead sponsor: Kristina A. Fanucci; Other
Eligibility: 18 Years and older
Enrollment: 297 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2026 – 2030
U.S. locations: 1
States / cities: Boston, Massachusetts

Conditions: HER2-negative Breast Cancer, Hormone Receptor Positive Tumor, Advanced Breast Cancer, Metastatic Breast Cancer
Interventions: TheraBionic P1; Device
Lead sponsor: Barbara Ann Karmanos Cancer Institute; Other
Eligibility: 22 Years and older
Enrollment: 82 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2026 – 2028
U.S. locations: 8
States / cities: Bay City, Michigan • Clarkston, Michigan • Detroit, Michigan + 5 more

Conditions: Advanced ER-Positive HER2-Negative Breast Cancer
Interventions: AZD9833, Fulvestrant; Drug
Lead sponsor: AstraZeneca; Industry
Eligibility: 18 Years to 130 Years · Female only
Enrollment: 240 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2020 – 2027
U.S. locations: 9
States / cities: Birmingham, Alabama • Long Beach, California • Fort Myers, Florida + 6 more

Conditions: HER2/Neu Positive, Recurrent Breast Carcinoma, Stage IIIC Breast Cancer AJCC v7, Stage IV Breast Cancer AJCC v6 and v7
Interventions: Endoxifen Hydrochloride, Laboratory Biomarker Analysis, Pharmacological Study, Questionnaire Administration; Drug · Other
Lead sponsor: National Cancer Institute (NCI); NIH
Eligibility: 18 Years and older · Female only
Enrollment: 62 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2011 – 2026
U.S. locations: 3
States / cities: Scottsdale, Arizona • Jacksonville, Florida • Rochester, Minnesota

Conditions: Breast Cancer, HER2-positive
Interventions: Zanidatamab, Letrozole, Tamoxifen; Drug
Lead sponsor: M.D. Anderson Cancer Center; Other
Eligibility: 18 Years and older · Female only
Enrollment: 20 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2021 – 2028
U.S. locations: 1
States / cities: Houston, Texas

Conditions: Breast Cancer
Interventions: Dato-DXd, Capecitabine, Gemcitabine, Eribulin, Vinorelbine; Drug
Lead sponsor: AstraZeneca; Industry
Eligibility: 18 Years and older
Enrollment: 732 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2021 – 2026
U.S. locations: 14
States / cities: Duarte, California • Los Angeles, California • Palo Alto, California + 10 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 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: Breast Cancer, HER2-positive Breast Cancer
Interventions: Paclitaxel, Nab-paclitaxel, Docetaxel, Trastuzumab, Pertuzumab; Drug
Lead sponsor: University of Illinois at 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: Breast Cancer
Interventions: GDC-0587, Giredestrant, Omeprazole; Drug
Lead sponsor: Genentech, Inc.; Industry
Eligibility: 18 Years and older
Enrollment: 3 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2026
U.S. locations: 2
States / cities: Grand Rapids, Michigan • San Antonio, Texas

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

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

A Study of Mutant Selective-Inhibitor (CGT6297), in Patients With Advanced Solid Tumors

PhII Randomized CAPecitabine + ELAcestrant vs. Capecitabine Alone in ER+ Breast Cancer (CAPELA)

A Ph II Study of the TheraBionic P1 Device in Subjects With Hormone Positive Breast Cancer

A Study to Investigate Efficacy and Safety With Oral AZD9833 Compared With Intramuscular Fulvestrant in Post-menopausal Women at Least 18 Years of Age With Advanced ER-positive HER2 Negative Breast Cancer

Z-Endoxifen Hydrochloride in Treating Patients With Metastatic or Locally Recurrent Estrogen Receptor-Positive Breast Cancer

A Phase 2 Single-Arm Open-Label Pilot Trial Evaluating Zanidatamab (ZW25) in Patients With Early Stage HER2/Neu Positive (HER2+) Breast Cancer (BC)

A Phase-3, Open-Label, Randomized Study of Dato-DXd Versus Investigator's Choice of Chemotherapy (ICC) in Participants With Inoperable or Metastatic HR-Positive, HER2-Negative Breast Cancer Who Have Been Treated With One or Two Prior Lines of Systemic Chemotherapy (TROPION-Breast01)

Atezolizumab + Pertuzumab + Trastuzumab In CNS Mets In BC

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

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

A Study to Evaluate the Safety, Pharmacokinetics, and Activity of GDC-0587 as a Monotherapy and in Combination With Giredestrant in Participants With Locally Advanced or Metastatic Estrogen Receptor-Positive and Human Epidermal Growth Factor Receptor 2-Negative (ER+/HER2-) Breast Cancer

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

About this Breast Cancer clinical trials directory page