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 18 of 26
Compliance to a Hormone Therapy Regimen in Breast Cancer
Case Comprehensive Cancer Center
NCT00666822
A Study of Etirinotecan Pegol (NKTR-102) Versus Treatment of Physician's Choice (TPC) in Patients With Metastatic Breast Cancer Who Have Stable Brain Metastases and Have Been Previously Treated With an Anthracycline, a Taxane, and Capecitabine
Nektar Therapeutics
NCT02915744
Lynne Cohen Consortium Project: Multi-Center Database/Registry
M.D. Anderson Cancer Center
NCT00776958
Mometasone Furoate in Preventing Radiation Dermatitis in Patients Undergoing Radiation Therapy to the Breast or Chest Wall for Invasive Breast Cancer or Ductal Carcinoma in Situ
North Central Cancer Treatment Group
NCT00438659
Nonlinear Elasticity Mapping of Breast Masses
Mayo Clinic
NCT04863443
A Study of Accelerated 3 Fraction Photon,Proton or Brachytherapy for Early Invasive and Noninvasive Breast Ca
Mayo Clinic
NCT02453737
Methods in Education for Breast Cancer Genetics
National Cancer Institute (NCI)
NCT00001806
A Study of Prexasertib (LY2606368) With Chemotherapy or Targeted Agents in Participants With Advanced Cancer
Eli Lilly and Company
NCT02124148
Bevacizumab With or Without Cyclophosphamide and Methotrexate: A Pilot Study in Women With Operable Breast Cancer
Harold J. Burstein, MD, PhD
NCT00121134
SentiMag® Intraoperative Comparison in Breast Cancer
Endomagnetics
NCT02336737
XeNA Study - A Study of Xeloda (Capecitabine) in Patients With Invasive Breast Cancer
Hoffmann-La Roche
NCT00127933
Utilizing Social Contacts to Facilitate Mammogram Screening Among African American Women
Washington University School of Medicine
NCT05275361
A Study of Trastuzumab Emtansine (T-DM1) Sequentially With Anthracycline-based Chemotherapy, as Adjuvant or Neoadjuvant Therapy for Patients With Early Stage Herceptin (HER)2-positive Breast Cancer
Hoffmann-La Roche
NCT01196052
Exercise Program in Cancer and Cognition
University of Pittsburgh
NCT02793921
Genetic Risk Estimation of Breast Cancer Prior to Preventive Medication Uptake
Mayo Clinic
NCT02517593
Role of 3D Tomography in Breast Cancer
University of Rochester
NCT01090687
Healing Touch, Quality of Life, and Immunity During Breast Cancer Treatment
University of Iowa
NCT00565305
Intraoperative Pathway in DIEP Flap Breast Reconstruction
Beth Israel Deaconess Medical Center
NCT00543764
Vibro-Acoustography Imaging in Diagnosing Breast Masses in Women With a Breast Mass or Breast Cancer
Mayo Clinic
NCT00627614
The Impact of Lymphedema on Breast Cancer Survivors
University of California, San Francisco
NCT00769821
Cisplatin and Paclitaxel With or Without Everolimus in Treating Patients With Stage II or Stage III Breast Cancer
Vanderbilt-Ingram Cancer Center
NCT00930930
Phase II Randomized Trial Evaluating Neoadjuvant Therapy With Neratinib and/or Trastuzumab Followed by Postoperative Trastuzumab in Women With Locally Advanced HER2-positive Breast Cancer
NSABP Foundation
NCT01008150
Spectroscopy of Breast Tissue
Case Comprehensive Cancer Center
NCT00918216
PASSION - P Trial: Ph Adjusted Sulfur-Colloid, Sentinel Initiative ON Pain Trial
Walter Reed Army Medical Center
NCT00940199
Changes in Breast Density and Blood Hormone Levels in Postmenopausal Women Receiving Anastrozole or Exemestane for Breast Cancer
Alliance for Clinical Trials in Oncology
NCT00516698
A Study to Evaluate the Safety and Efficacy of Ipatasertib in Combination With Atezolizumab and Paclitaxel or Nab-Paclitaxel in Participants With Locally Advanced or Metastatic Triple-Negative Breast Cancer
Hoffmann-La Roche
NCT03800836
Multi-Media Imagery Program for Breast Cancer Patients (Phase II)
Mind Matters Research
NCT01034215
Cystic Breast Masses by Contrast Enhanced Ultrasound (CEUS)
University of Southern California
NCT02887937
PECS Block vs. Multimodal Analgesia for Prevention of Persistent Postoperative Pain in Breast Surgery
Washington University School of Medicine
NCT03084536
Side Effects Involving the Heart in Women With Breast Cancer Receiving Doxorubicin and Trastuzumab
Vanderbilt University
NCT00875238
Myofascial Massage for Pain and Immobility Following Breast Cancer Surgery
MetroHealth Medical Center
NCT04233385
Contrast Enhanced Spectral Mammography vs. MRI for Breast Cancer Screening
Beth Israel Deaconess Medical Center
NCT03482557
A Prospective Longitudinal Breast Cancer Study
Fujirebio Diagnostics
NCT02270931
Routine Evaluation of the Social Determinants of Health in Oncology: User-centered Resource Coordination and Engagement
Dana-Farber Cancer Institute
NCT04879927
Novel Epothilone (BMS-247550) in Patients With Metastatic Breast Cancer (MBC)
R-Pharm
NCT00080262
Prevalence+Significance of Paraneoplastic Autoantibodies in Many Cancers
Memorial Sloan Kettering Cancer Center
NCT00608452
Enhancing Management of Chronic Pain and Symptoms Among Women Treated for Breast Cancer (Lymph-Flow)
NYU Langone Health
NCT02462226
Understanding the Value of Community Vital Signs in Primary Care
Virginia Commonwealth University
NCT02512835
Loss of Grip Strength, BMI, and Adjuvant Endocrine Therapy Breast Cancer
University of Michigan Rogel Cancer Center
NCT01896050
Stress, Diurnal Cortisol, and Breast Cancer Survival
Stanford University
NCT00226967
Breast MRI as a Preoperative Tool for DCIS
Memorial Sloan Kettering Cancer Center
NCT00605982
Facilitating Adjustment in Low Income Black Women With Breast Cancer
University of Miami
NCT02272335
A Study of Delivering a Mindfulness App Intervention to Accompany Supportive Care Among Women With Breast Cancer
The University of Texas Health Science Center at San Antonio
NCT02601794
Soy Protein Supplement In Treating Hot Flashes in Postmenopausal Women Receiving Tamoxifen for Breast Disease
Alliance for Clinical Trials in Oncology
NCT00031720
Using the Active Breathing Control Device to Reduce Radiation Side Effects to Critical Structures in Breast Cancer
Sidney Kimmel Comprehensive Cancer Center at Thomas Jefferson University
NCT00328783
Trial of Drain Antisepsis After Tissue Expander Breast Reconstruction
Mayo Clinic
NCT01286168
Docetaxel in Treating Patients With Solid Tumors
Alliance for Clinical Trials in Oncology
NCT00003565
X-Ray Mammography Standard of Care Protocol
National Institutes of Health Clinical Center (CC)
NCT01052740
Letrozole in Treating Postmenopausal Women With Ductal Carcinoma in Situ
Alliance for Clinical Trials in Oncology
NCT01439711
Understanding Decision Making Processes for Undergoing Genetic Testing Among Women With Newly Diagnosed Breast Cancer
Memorial Sloan Kettering Cancer Center
NCT01386411
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.