Medical Information Only. Consult your healthcare provider before considering clinical trial enrollment.
Breast Cancer: early-phase trial registry
423 of 1,251 indexed Breast Cancer trials are currently recruiting, with more weight in Phase 1-2.
Corpus placement: #1 of 28,963 conditions by registered trial count.
1,251 US clinical trials · 423 currently recruiting · #1 of 28,963 conditions by registered trial count
Breast Cancer: 1,251 US clinical trials tracked, 423 recruiting.
Breast Cancer is the subject of 1,251 registered US clinical trials on ClinicalTrials.gov, 423 of them currently open to new participants. 120 are in Phase 3-4 (later-stage) and 491 in Phase 1-2 (earlier-stage). The most active sponsor is Memorial Sloan Kettering Cancer Center, running 98 of these trials.
Open enrollment, early-phase tilt
Breast Cancer has 1,251 registered US clinical trials, 423 of them open to new participants right now, about 34% of the total.
- 423
- recruiting participants now
- 34%
- of trials open to enrollment
- 120
- in Phase 3-4 (later-stage)
- 98
- top sponsor: Memorial Sloan Kettering Cancer Center
Corpus placement: #1 of 28,963 conditions by registered trial count on ClinicalTrials.gov-derived indexes. Registry reference only, not medical advice.
Key findings
What ClinicalTrials.gov does not surface for Breast Cancer on its own pages , computed from the registry mirror as of 2026-07-11. Each line carries its own denominator so it can be quoted as it stands.
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Breast Cancer is recruiting below its size-band peers.
423 of 1,251 indexed trials (33.8%) are open to enrollment, against a 37.2% average across 135 conditions with 100+ trials. The peer set uses the same ClinicalTrials.gov-derived counts as this page.
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Sponsorship of Breast Cancer trials is spread across many organizations.
Memorial Sloan Kettering Cancer Center accounts for 98 of 1,251 trials (7.8%). 367 distinct sponsors appear on at least one study for this condition label.
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Typical Breast Cancer enrolment sits around 90 participants.
Median target enrolment is 90 among the 1,225 trials that report a genuine target (sentinel values excluded). 630 of those (51.4%) plan for fewer than 100 participants.
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Breast Cancer research is mostly interventional.
1,015 interventional and 236 observational studies make up this index (81.1% interventional). Study type is sponsor-reported on ClinicalTrials.gov.
Open and recent trials
1,251 total, page 24 of 26
Effects of Acupuncture on Aromatase Inhibitor-Induced Joint Pain
Saint John's Cancer Institute
NCT02548637
Feasibility of Providing a Purpose Renewal Intervention for Cancer Survivors Via Virtual Groups
Mary Radomski
NCT04767464
Vaccine Therapy in Treating Patients With Metastatic Breast Cancer
Dana-Farber Cancer Institute
NCT00003761
The Use of Molecular Breast Imaging in the Evaluation of Tumor Response to Neoadjuvant Therapy in Women With Breast Cancer
Mayo Clinic
NCT01023802
Effect of Aprepitant on Cyclophosphamide Pharmacokinetics in Patients With Breast Cancer
UNC Lineberger Comprehensive Cancer Center
NCT00719173
Bright Light on Fatigue in Women Being Treated for Breast Cancer
Washington University School of Medicine
NCT02658708
Umbrella Trial of Subtype-Targeted Therapies in ER+/HER2- Breast Cancer
Jennifer Lee Caswell-Jin
NCT05101564
Pre-Operative, Single-Dose Ipilimumab and/or Cryoablation in Early Stage/Resectable Breast Cancer
Memorial Sloan Kettering Cancer Center
NCT01502592
Docetaxel, Carboplatin, and Trastuzumab and/or Lapatinib in Treating Women With Stage I, Stage II, or Stage III Breast Cancer That Can Be Removed by Surgery
Translational Oncology Research International
NCT00769470
Dietary Fat, Eicosanoids and Breast Cancer Risk
USDA Grand Forks Human Nutrition Research Center
NCT01824498
A Study Comparing Oral Picoplatin With Intravenous Picoplatin in Subjects With Solid Tumors
Poniard Pharmaceuticals
NCT00465725
Developing a Psychosexual Educational Partners Program: PEPP A Feasibility Study
University of Michigan Rogel Cancer Center
NCT05070299
Study to Compare the Effects of Repeated Doses of an Investigational New Drug and a Placebo on Appetite in Advanced Cancer and Anorexia
Pfizer
NCT04803305
Diffusion Tensor Imaging in Predicting Development of Chemotherapy Induced Peripheral Neuropathy in Patients With Breast Cancer (CIPN)
University of Arizona
NCT03365895
Study to Assess the Efficacy of Pembrolizumab Plus Radiotherapy in Metastatic Triple Negative Breast Cancer Patients
Memorial Sloan Kettering Cancer Center
NCT02730130
Emotions Immunology and Breast Cancer
Luz A. Venta, MD
NCT03609671
CRRS-4 Pivotal Somo•v™ ABUS ROC Reader Observer Study
U-Systems
NCT01424956
Omega-3 Fatty Acids in Treating Women With Newly Diagnosed Ductal Carcinoma In Situ and/or Atypical Ductal Hyperplasia
OHSU Knight Cancer Institute
NCT00627276
Effects of Aromatase Inhibitor Therapy on Muscle Function
Tarah J Ballinger, MD
NCT03581552
Adjuvant Stage 2-3A Breast Cancer With Positive Lymph Nodes
Case Comprehensive Cancer Center
NCT00007904
Increasing Physical Activity Among Breast Cancer Survivors With Depression
University of Texas Southwestern Medical Center
NCT02781051
Sorafenib, Pemetrexed, and Cisplatin in Treating Patients With Advanced Solid Tumors
Masonic Cancer Center, University of Minnesota
NCT00703638
Breast Computed Tomography (CT) as a Diagnostic Tool
Emory University
NCT00957307
Purpose Project: Reclaiming Life Purpose After Breast Cancer (Feasibility Study)
Allina Health System
NCT03233334
Effect of GDC-0810 on the Pharmacokinetics of Pravastatin in Healthy Female Subjects of Non-Childbearing Potential
Genentech
NCT02621957
Epirubicin in Treating Women Who Are Undergoing Surgery for Stage I, Stage II, or Stage III Breast Cancer
Case Comprehensive Cancer Center
NCT00253500
Erlotinib and Everolimus in Treating Patients With Metastatic Breast Cancer
Vanderbilt-Ingram Cancer Center
NCT00574366
Collection of Blood Specimens for Circulating Tumor Cell Analysis
Viatar
NCT01943500
Study to Assess Food Effect on Pharmacokinetics of Entinostat in Subjects With Breast Cancer or Non-Small Cell Lung Cancer
Syndax Pharmaceuticals
NCT01594398
Using an End-of-life Conversation Game to Engage Patients With Cancer in Advance Care Planning
Milton S. Hershey Medical Center
NCT06028152
Magnetic Resonance Imaging of Lymph Nodes Using Ferumoxytol in Patients With Primary Prostate or Breast Cancer
Massachusetts General Hospital
NCT00087347
Role of Magnetic Resonance Fingerprinting and Quantitative MR Imaging in Breast Cancer
Case Comprehensive Cancer Center
NCT03650803
Allogeneic Natural Killer (NK) Cells for Ovarian, Fallopian Tube, Peritoneal and Metastatic Breast Cancer
Masonic Cancer Center, University of Minnesota
NCT01105650
A Home-Based Study to Enhance Activity in Breast Cancer Survivors
Baystate Medical Center
NCT02969291
Study of Cancer Peptides Vaccine Plus GM-CSF as Adjuvant Treatment for High Risk (TXN2-3M0) or Metastatic Breast Cancer With No Evidence of Disease
Duke University
NCT00674791
Imaging the Patterns of Breast Cancer Early Metastases
University of Florida
NCT02706964
Irinotecan and Capecitabine in Treating Women With Advanced Breast Cancer
Roswell Park Cancer Institute
NCT00083148
Pilot Study: Combined Molecular Breast Imaging/Ultrasound System for Diagnostic Evaluation of MBI-detected Lesions
Mayo Clinic
NCT01806558
Breast Cancer, Aromatase Inhibitor Therapy, and Sexual Functioning: The Effects of Vaginal Testosterone Therapy
Creighton University
NCT01697345
Multi-Targeted Recombinant Ad5 (CEA/MUC1/Brachyury) Based Immunotherapy Vaccine Regimen in People With Advanced Cancer
National Cancer Institute (NCI)
NCT03384316
Implantable Microdevice for In Vivo Drug Sensitivity Testing in Patients With Early Stage, HER2-Positive or Triple Negative Breast Cancer
Memorial Sloan Kettering Cancer Center
NCT02521363
A Study of Serum Folate Levels in Patients Treated With Olaparib
Rush University Medical Center
NCT04024254
Phase 2 Trial of Selinexor (KPT-330) for Metastatic Triple Negative Breast Cancer (TNBC)
H. Lee Moffitt Cancer Center and Research Institute
NCT02402764
Acupuncture for Anxiety in Women With Breast Cancer: A Feasibility Study
University of New Mexi
NCT00322504
Ultrasound and Near Infrared Imaging for Breast Cancer Diagnosis and Neoadjuvant Chemotherapy Monitoring
UConn Health
NCT02092636
Estrogen Receptor-Positive Breast Cancer Patient-Derived Xenografts
Dartmouth-Hitchcock Medical Center
NCT02752893
ICG and SLN Mapping
University of Wisconsin, Madison
NCT05859971
Study of Propranolol in Newly Diagnosed Breast Cancer Patients Undergoing Neoadjuvant Chemotherapy
Columbia University
NCT01847001
Gemcitabine/ Trastuzumab and Gemcitabine/ Cisplatin/ Trastuzumab in Patients With Metastatic Breast Cancer
Kari Kendra
NCT00201760
Trastuzumab and Irinotecan in Treating Patients With HER2/Neu Positive Metastatic Breast Cancer
University of California, San Francisco
NCT00303992
Phase Distribution
| Phase | Trial count |
|---|---|
| Phase 1 | 235 |
| Phase 2 | 256 |
| Phase 3 | 100 |
| Phase 4 | 20 |
Top Sponsors
Source: ClinicalTrials.gov, National Library of Medicine. Data is informational only.
What is open for Breast Cancer right now
423 recruiting of 1,251 indexed (34% open).
Phase mix: 120 late (III/IV) vs 491 early (I/II) (early-phase heavy).
Top sponsor: Memorial Sloan Kettering Cancer Center (98 trials), 9 others listed. 50 shown below, recruiting first. #1 of 28,963 conditions by registered trial count.
How open-enrollment share is computed
Open share is recruiting_count divided by trial_count for this condition label in the public registry export. Status can change between pulls; treat the figure as a snapshot of research attention, not treatment availability.
Frequently Asked Questions
How many clinical trials are there for Breast Cancer?
PlainTrial tracks 1,251 US clinical trials for Breast Cancer, of which 423 are currently recruiting participants. Data sourced from ClinicalTrials.gov.
How do I find a recruiting trial for Breast Cancer?
Use the trial list above filtered by "Recruiting" status, or visit our trial finder at /recruiting to search by condition and state. Always discuss trial participation with your healthcare provider before enrolling.
Is this data current?
Data is sourced from ClinicalTrials.gov and reflects our most recent data pull. Trial status may have changed since then. Always verify current information at ClinicalTrials.gov before making decisions about participation.
Related
Disclaimer: This information is provided for informational purposes only and does not constitute professional advice. Data is sourced from ClinicalTrials.gov (National Library of Medicine). Consult a qualified professional before making decisions based on this data.
Read our methodology - how this data is sourced, computed, and verified.
Source: ClinicalTrials.gov (NIH/NLM) ClinicalTrials.gov AACT registry · 2026 Trial counts and statuses sourced from ClinicalTrials.gov. Sponsor counts include both industry and federal/academic sponsors.
Every figure on PlainTrial is rendered directly from the ClinicalTrials.gov registry, no number is typed in by an editor. This page aggregates every registered trial for this condition, live from the dataset. See our editorial standards & corrections policy, the methodology behind these numbers, the data changelog, or report a data error.