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, 6:10 AM EDT

Data is sourced from official ClinicalTrials.gov public API records. 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 133–144 of 1,131 matching trials for Breast Cancer.

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Conditions: Estrogen Receptor-Positive, HER2-Negative, Locally Advanced or Metastatic Breast Cancer
Interventions: Giredestrant, Fulvestrant or an Aromatase Inhibitor (Physician Choice), LHRH Agonist; Drug
Lead sponsor: Hoffmann-La Roche; Industry
Eligibility: 18 Years and older
Enrollment: 303 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2020 – 2027
U.S. locations: 3
States / cities: Marietta, Georgia • Cleveland, Ohio • Tigard, Oregon

Conditions: Metastatic Breast Cancer
Interventions: Palbociclib, Fulvestrant, Avelumab; Drug
Lead sponsor: Dana-Farber Cancer Institute; Other
Eligibility: 18 Years and older
Enrollment: 220 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2017 – 2026
U.S. locations: 22
States / cities: Miami, Florida • Atlanta, Georgia • Chicago, Illinois + 18 more

Conditions: Breast Cancer
Interventions: Inavolisib, Placebo, Palbociclib, Fulvestrant; Drug
Lead sponsor: Hoffmann-La Roche; Industry
Eligibility: 18 Years and older
Enrollment: 325 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2020 – 2027
U.S. locations: 10
States / cities: Beverly Hills, California • Boston, Massachusetts • New York, New York + 7 more

Conditions: Breast Cancer
Interventions: [68Ga]Ga-NeoB, [177Lu]Lu-NeoB, Ribociclib, Fulvestrant, Goserelin; Drug · Other
Lead sponsor: Novartis Pharmaceuticals; Industry
Eligibility: 18 Years to 100 Years
Enrollment: 28 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2023 – 2032
U.S. locations: 2
States / cities: Los Angeles, California • Houston, Texas

Conditions: Breast Cancer
Interventions: [68Ga]Ga-NeoB, [177Lu]Lu-NeoB, Capecitabine; Drug
Lead sponsor: Novartis Pharmaceuticals; Industry
Eligibility: 18 Years to 100 Years
Enrollment: 20 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2024 – 2027
U.S. locations: 5
States / cities: Los Angeles, California • Newport Beach, California • Rochester, Minnesota + 2 more

Conditions: Early Stage Estrogen Receptor (ER) Positive Breast Cancer
Interventions: Active Surveillance; Other
Lead sponsor: University of Pittsburgh; Other
Eligibility: 70 Years and older · Female only
Enrollment: 50 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2025 – 2030
U.S. locations: 1
States / cities: Pittsburgh, Pennsylvania

Conditions: Breast Neoplasms, Breast Cancer
Interventions: Patritumab deruxtecan, Pembrolizumab, Paclitaxel, Carboplatin, Doxorubicin hydrochloride, Epirubicin hydrochloride, Cyclophosphamide, Capecitabine, Olaparib; Biological · Drug
Lead sponsor: Merck Sharp & Dohme LLC; Industry
Eligibility: 18 Years and older
Enrollment: 372 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2025 – 2034
U.S. locations: 8
States / cities: Santa Monica, California • Skokie, Illinois • Billings, Montana + 5 more

Conditions: Breast Cancer, HER2-positive Breast Cancer, Triple Negative Breast Cancer, Hormone Receptor Positive Malignant Neoplasm of Breast, Inflammatory Breast Cancer, Metastatic Breast Cancer
Interventions: MRI; Device
Lead sponsor: Brigham and Women's Hospital; Other
Eligibility: 18 Years and older
Enrollment: 214 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2019 – 2028
U.S. locations: 1
States / cities: Boston, Massachusetts

Conditions: Brain Cancer, Brain Metastases, Melanoma, Lung Cancer, Breast Cancer, HER2-positive Breast Cancer, Colorectal Cancer, Gastrointestinal Cancer, SRS, SRT, Whole Brain Radiation, Stereotactic Radiation, AGuIX, Nanoparticle, Cystic, Brain Tumor
Interventions: Stereotactic Radiation, AGuIX gadolinium-based nanoparticles, Placebo; Radiation · Drug · Other
Lead sponsor: Brigham and Women's Hospital; Other
Eligibility: 18 Years and older
Enrollment: 134 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2021 – 2029
U.S. locations: 2
States / cities: Boston, Massachusetts

Conditions: HER2 Mutation-Related Tumors, HER2, HER2-positive Breast Cancer, HER2 + Breast Cancer, Brain Metastases From Solid Tumors, Brain Metastases From HER2 and Breast Cancer, CNS Metastases, HER2-Positive Solid Tumors, NSCLC (Non-small Cell Lung Cancer), HER2-positive Bladder Cancer, HER2-positive Colorectal Cancer, HER2 + Gastric Cancer, HER2-positive Gastroesophageal Cancer
Interventions: IAM1363; Drug
Lead sponsor: Iambic Therapeutics, Inc; Industry
Eligibility: 18 Years and older
Enrollment: 383 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2024 – 2028
U.S. locations: 29
States / cities: La Jolla, California • Los Angeles, California • Aurora, Colorado + 23 more

Conditions: ER-Positive HER2-Negative Breast Cancer
Interventions: Camizestrant, Ribociclib; Drug
Lead sponsor: AstraZeneca; Industry
Eligibility: 18 Years to 130 Years
Enrollment: 150 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2026 – 2029
U.S. locations: 12
States / cities: Duarte, California • Palo Alto, California • Marietta, Georgia + 9 more

Conditions: HER2+ Metastatic Breast Cancer (MBC)
Interventions: Patient Navigation Program; Behavioral
Lead sponsor: Duke University; Other
Eligibility: 18 Years and older · Female only
Enrollment: 26 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2026 – 2027
U.S. locations: 1
States / cities: Durham, North Carolina

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 Evaluating the Efficacy and Safety of Giredestrant Compared With Physician's Choice of Endocrine Monotherapy in Participants With Previously Treated Estrogen Receptor-Positive, HER2-Negative Locally Advanced or Metastatic Breast Cancer (acelERA Breast Cancer)

Palbociclib After CDK and Endocrine Therapy (PACE)

A Study Evaluating the Efficacy and Safety of Inavolisib + Palbociclib + Fulvestrant vs Placebo + Palbociclib + Fulvestrant in Participants With PIK3CA-Mutant, Hormone Receptor-Positive, HER2-Negative, Locally Advanced or Metastatic Breast Cancer

[177Lu]Lu-NeoB in Combination With Ribociclib and Fulvestrant in Participants With ER+, HER2- and GRPR+ Advanced Breast Cancer

A Phase I/II, Dose Finding and Optimization Study of [177Lu]Lu-NeoB in Combination With Capecitabine in Patients With GRPR+, ER+, HER2- Metastatic Breast Cancer After Progression on Previous Endocrine Therapy in Combination With a CDK4/6 Inhibitor.

Active Surveillance in Older Women With ER+ Breast Cancer

Study of Patritumab Deruxtecan Plus Pembrolizumab With Other Anticancer Agents in Participants With High-Risk Early-Stage Triple-Negative or Hormone Receptor-Low Positive/HER-2 Negative Breast Cancer (MK-1022-010, HERTHENA-Breast-03)

Screening Magnetic Resonance Imaging of the Brain in Patients With Breast Cancer

Stereotactic Brain-directed Radiation With or Without Aguix Gadolinium-Based Nanoparticles in Brain Metastases

A Phase 1/1b Study of IAM1363 in HER2 Cancers

A Phase IIIb Study to Evaluate Camizestrant Plus Ribociclib in ER-positive, HER2-negative Advanced Breast Cancer

Patient Navigation for HER2+ Metastatic Breast Cancer Patients Treated With Tucatinib

About this Breast Cancer clinical trials directory page