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 the Clinical Trials Finder editorial team Guidance last reviewed June 10, 2026 Data synced July 24, 2026 Report an issue

ClinicalTrials.gov public records Last synced Jul 24, 2026, 5:09 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

669

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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 1–12 of 669 matching trials for Breast Cancer.

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Conditions: HR+/HER2- Breast Cancer
Interventions: BGB-43395, Letrozole, Abemaciclib, Palbociclib, Ribociclib; Drug
Lead sponsor: BeOne Medicines; Industry
Eligibility: 18 Years and older
Enrollment: 1,056 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2026 – 2037
U.S. locations: 25
States / cities: Birmingham, Alabama • Anchorage, Alaska • Chandler, Arizona + 22 more

Conditions: Female Breast Carcinoma, Breast Cancer
Interventions: anastrozole, Palbociclib; Drug
Lead sponsor: Wake Forest University Health Sciences; Other
Eligibility: 18 Years and older · Female only
Enrollment: 40 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2016 – 2028
U.S. locations: 1
States / cities: Charlotte, North Carolina

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, Non-small Cell Lung Cancer
Interventions: BGB-43395, Fulvestrant, Letrozole, Elacestrant, Anti-Diarrheal Agent; Drug
Lead sponsor: BeOne Medicines; Industry
Eligibility: 18 Years and older
Enrollment: 399 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2023 – 2028
U.S. locations: 10
States / cities: Denver, Colorado • Lake Mary, Florida • Detroit, Michigan + 7 more

Conditions: Breast Neoplasms
Interventions: Patritumab deruxtecan, Paclitaxel, Nab-paclitaxel, Capecitabine, Liposomal doxorubicin, Trastuzumab deruxtecan; Biological · Drug
Lead sponsor: Merck Sharp & Dohme LLC; Industry
Eligibility: 18 Years and older
Enrollment: 1,000 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2025 – 2033
U.S. locations: 34
States / cities: Daphne, Alabama • Tucson, Arizona • Los Angeles, California + 27 more

Conditions: Breast Cancer, Metastatic Breast Cancer, Triple Negative Breast Cancer, Estrogen-receptor-positive Breast Cancer, Hormone Receptor Negative Breast Carcinoma
Interventions: SERD* + abemaciclib, SERD* + everolimus, SERD* + everolimus or capecitabine, SOC, Antiandrogen; Drug
Lead sponsor: UNC Lineberger Comprehensive Cancer Center; Other
Eligibility: 18 Years and older
Enrollment: 700 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2026 – 2031
U.S. locations: 3
States / cities: Baltimore, Maryland • Rochester, Minnesota • Chapel Hill, North Carolina

Conditions: Breast Neoplasms, Neoplasm Metastasis
Interventions: Imlunestrant, Exemestane, Fulvestrant, Abemaciclib; Drug
Lead sponsor: Eli Lilly and Company; Industry
Eligibility: 18 Years and older
Enrollment: 874 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2021 – 2027
U.S. locations: 48
States / cities: Chandler, Arizona • Gilbert, Arizona • Greenbrae, California + 29 more

Conditions: Breast Cancer, Ovarian Cancer, Endometrial Cancer, PIK3CA Mutation, HER2- Negative Breast Cancer, Advanced Breast Cancer, Unresectable Solid Tumor, Hormone Receptor Positive Tumor, Cervical Cancer
Interventions: RGT-490; Drug
Lead sponsor: Regor Pharmaceuticals Inc.; Industry
Eligibility: 18 Years and older
Enrollment: 63 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2026 – 2028
U.S. locations: 5
States / cities: Los Angeles, California • Houston, Texas • San Antonio, Texas + 1 more

Conditions: Anatomic Stage IV Breast Cancer AJCC v8, Clinical Stage IV Cutaneous Melanoma AJCC v8, Locally Advanced Cutaneous Melanoma, Locally Advanced Mucosal Melanoma, Metastatic Acral Melanoma, Metastatic Conjunctival Melanoma, Metastatic Cutaneous Melanoma, Metastatic HER2-Negative Breast Carcinoma, Metastatic Hormone Receptor-Positive Breast Carcinoma, Metastatic Lung Non-Small Cell Carcinoma, Metastatic Malignant Solid Neoplasm, Metastatic Mucosal Melanoma, Pathologic Stage IIIC Cutaneous Melanoma AJCC v8, Pathologic Stage IIID Cutaneous Melanoma AJCC v8, Recurrent Cutaneous Melanoma, Recurrent HER2-Negative Breast Carcinoma, Recurrent Hormone Receptor-Positive Breast Carcinoma, Recurrent Lung Non-Small Cell Carcinoma, Recurrent Mucosal Melanoma, Stage III Lung Cancer AJCC v8, Stage IV Lung Cancer AJCC v8, Unresectable Acral Melanoma, Unresectable Cutaneous Melanoma, Unresectable Lung Non-Small Cell Carcinoma, Unresectable Mucosal Melanoma
Interventions: Neoantigen Peptide Vaccine, Nivolumab, Poly ICLC, Echocardiography Test, Multigated Acquisition Scan, Biopsy Procedure, Biospecimen Collection, Computed Tomography, Positron Emission Tomography, Ruxolitinib; Biological · Drug · Procedure
Lead sponsor: Fred Hutchinson Cancer Center; Other
Eligibility: 18 Years and older
Enrollment: 28 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2022 – 2028
U.S. locations: 1
States / cities: Seattle, Washington

Conditions: Breast Neoplasms
Interventions: pembrolizumab, paclitaxel, nab-paclitaxel, liposomal doxorubicin, capecitabine, normal saline, dextrose; Biological · Drug
Lead sponsor: Merck Sharp & Dohme LLC; Industry
Eligibility: 18 Years and older
Enrollment: 342 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2021 – 2027
U.S. locations: 41
States / cities: Birmingham, Alabama • Tucson, Arizona • Monterey, California + 33 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: 2027 – 2029
U.S. locations: 72
States / cities: Jonesboro, Arkansas • Berkeley, California • Palo Alto, California + 57 more

Conditions: Advanced Breast Cancer, Metastatic Breast Cancer (HR+/ HER2-), Colorectal Cancer, Metastatic Colorectal Adenocarcinoma, Triple Negative Breast Cancer
Interventions: PF-08032562, Fulvestrant, Cetuximab, Fluorouracil, Oxaliplatin, Leucovorin, Bevacizumab; Drug
Lead sponsor: Pfizer; Industry
Eligibility: 18 Years and older
Enrollment: 260 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2025 – 2030
U.S. locations: 13
States / cities: Duarte, California • Grand Rapids, Michigan • Long Island City, New York + 7 more

Conditions: Obesity (Disorder), Breast Cancer
Interventions: Tirzepatide; Drug
Lead sponsor: Weill Medical College of Cornell University; Other
Eligibility: 18 Years and older · Female only
Enrollment: 30 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2026 – 2028
U.S. locations: 1
States / cities: New York, New York

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

BGB-43395 Plus Letrozole Versus CDK4/6i Plus Letrozole for Patients With Advanced or Metastatic HR+/HER2- Breast Cancer Who Have Not Received Prior Treatment for Advanced or Metastatic Disease

Trial of Anastrozole and Palbociclib in Metastatic HER2-Negative Breast Cancer

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

A Clinical Study of Patritumab Deruxtecan to Treat Breast Cancer (MK-1022-016)

Evolutionary Clinical Trial for Novel Biomarker-Driven Therapies

A Study of Imlunestrant, Investigator's Choice of Endocrine Therapy, and Imlunestrant Plus Abemaciclib in Participants With ER+, HER2- Advanced Breast Cancer

Study of RGT-490 in Patients With PIK3CA-Mutated Advanced Solid Tumors

Personalized Neo-Antigen Peptide Vaccine for the Treatment of Stage IIIC-IV Melanoma, Hormone Receptor Positive HER2 Negative Metastatic Refractory Breast Cancer or Stage III-IV Non-Small Cell Lung Cancer

Study of Pembrolizumab (MK-3475) Plus Chemotherapy Versus Placebo Plus Chemotherapy for HR+/HER2- Locally Recurrent Inoperable or Metastatic Breast Cancer (MK-3475-B49/KEYNOTE-B49)

Testing Whether Hormone Therapy With Ribociclib is as Effective as Chemotherapy Followed by Hormone Therapy With Ribociclib for the Treatment of High Anatomic Stage Breast Cancer With Low Recurrence Risk, The RxFINE-Low Trial

A Study to Learn About the Study Medicine Called PF-08032562 in People With Advanced or Metastatic Solid Tumors

Tirzepatide's Role in Postmenopausal HR+ Breast Cancer Survivors

About this Breast Cancer clinical trials directory page