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Breast Neoplasm Clinical Trials

Review the breast neoplasm clinical trials on this list and use the filters to refine the results by age and location. Some clinical trials are held at NCI-Designated Cancer Centers and may be supported by other organizations.

You can find more information about the types and phases of clinical trials and what to expect or use our Steps to Find a Clinical Trial.

Trials 1-25 of 721

Testing the Addition of Chemotherapy to the Usual Treatment of Ovarian Function Suppression plus Hormonal Therapy in Premenopausal ER-Positive/HER2-Negative Breast Cancer Patients Who Are At High Risk of Cancer Returning, OFSET Trial
Status: Active
Location: 1148 locations
Shorter Chemo-Immunotherapy Without Anthracycline Drugs for Early Triple Negative Breast Cancer
Status: Active
Location: 965 locations
Pembrolizumab versus Observation in Patients with Early Stage Triple-Negative Breast Cancer who had a Pathologic Complete Response after Chemotherapy plus Pembrolizumab, OptimICE-PCR Trial
Status: Active
Location: 804 locations
Testing the Usual Treatment of Radiation Therapy and Hormonal Therapy to Hormonal Therapy alone for Low-Risk, Early Stage Breast Cancer, the DEBRA Trial
Status: Active
Location: 754 locations
Adding an Immunotherapy Drug, MEDI4736 (durvalumab), to the Usual Chemotherapy Treatment (Paclitaxel, Cyclophosphamide, and Doxorubicin) for Stage II-III Breast Cancer
Status: Active
Location: 525 locations
ShortStop-HER2: 12 months vs. 6 months of HER2-targeted Medications for People with HER2+ Breast Cancer who Had a Pathologic Complete Response after Chemotherapy Plus Trastuzumab
Status: Active
Location: 539 locations
Regional Radiation Therapy with or without Whole Breast Irradiation in Treating Patients with Estrogen Receptor Positive, HER2 Negative Low Risk Breast Cancer Who Have Undergone Breast Conserving Surgery or Mastectomy
Status: Active
Location: 388 locations
Testing Longer Duration Radiation Therapy Versus the Usual Radiation Therapy in Patients with Cancer That Has Spread to the Brain
Status: Active
Location: 244 locations
Testing Proton Craniospinal Radiation Therapy Versus the Usual Radiation Therapy for Leptomeningeal Metastasis, RADIATE-LM Trial
Status: Active
Location: 58 locations
A Study of Elacestrant Versus Standard Endocrine Therapy in Women and Men With ER+,HER2-, Early Breast Cancer With High Risk of Recurrence
Status: Active
Location: 56 locations
Hormonal Therapy after Pertuzumab and Trastuzumab for the Treatment of Hormone Receptor Positive, HER2 Positive Breast Cancer, the ADEPT study
Status: Active
Location: 42 locations
An Adjuvant Endocrine-based Therapy Study of Camizestrant (AZD9833) in ER+/HER2- Early Breast Cancer (CAMBRIA-2)
Status: Active
Location: 40 locations
Study of Sacituzumab Govitecan-hziy and Pembrolizumab Versus Treatment of Physician's Choice in Patients With Triple Negative Breast Cancer Who Have Residual Invasive Disease After Surgery and Neoadjuvant Therapy (ASCENT-05/AFT-65 OptimICE-RD/GBG 119/NSABP B-63)
Status: Active
Location: 41 locations
I-SPY TRIAL: Neoadjuvant and Personalized Adaptive Novel Agents to Treat Breast Cancer
Status: Active
Location: 36 locations
Phase 3 Study to Evaluate the Efficacy and Safety of HER2/Neu Peptide GLSI-100 (GP2 + GM-CSF) in HER2/Neu Positive Subjects
Status: Active
Location: 32 locations
Trastuzumab Emtansine Followed by Trastuzumab versus Paclitaxel in Combination with Trastuzumab for the Treatment of HER2-Positive Stage I Breast Cancer, ATEMPT 2.0 Trial
Status: Active
Location: 32 locations
A Study Comparing the Efficacy and Safety of Zanidatamab to Trastuzumab, Each in Combination With Physician's Choice Chemotherapy, for the Treatment of Participants With Metastatic HER2-positive Breast Cancer
Status: Active
Location: 30 locations
Phase 3 Study of RLY-2608 + Fulvestrant vs Capivasertib + Fulvestrant as Treatment for Locally Advanced or Metastatic PIK3CA-mutant HR+/HER2- Breast Cancer
Status: Active
Location: 31 locations
Capivasertib + CDK4/6i + Fulvestrant for Advanced/Metastatic HR+/HER2- Breast Cancer (CAPItello-292)
Status: Active
Location: 25 locations
Testing the Addition of an Individualized Vaccine to Durvalumab and Tremelimumab and Chemotherapy in Patients with Metastatic Triple Negative Breast Cancer
Status: Active
Location: 26 locations
The CDK4/6 Inhibitor Dosing Knowledge (CDK) Study
Status: Active
Location: 24 locations
Study of PF-07220060 With Letrozole in Adults With HR-positive HER2-negative Breast Cancer Who Have Not Received Anticancer Treatment for Advanced/Metastatic Disease
Status: Active
Location: 28 locations
Evaluation of Lasofoxifene Combined With Abemaciclib Compared With Fulvestrant Combined With Abemaciclib in Locally Advanced or Metastatic ER+/HER2- Breast Cancer With an ESR1 Mutation
Status: Active
Location: 21 locations
Open-Label Umbrella Study To Evaluate Safety And Efficacy Of Elacestrant In Various Combination In Participants With Metastatic Breast Cancer
Status: Active
Location: 20 locations
A Study of Sacituzumab Tirumotecan (MK-2870) as a Single Agent and in Combination With Pembrolizumab (MK-3475) Versus Treatment of Physician's Choice in Participants With HR+/HER2- Unresectable Locally Advanced or Metastatic Breast Cancer (MK-2870-010)
Status: Active
Location: 21 locations