Early Stage Breast Cancer Clinical Trials

52 recruitingLast updated: June 17, 2026

There are 52 actively recruiting early stage breast cancer clinical trials across 18 countries. Studies span Not Applicable, Phase 2, Phase 3, Phase 4. Top locations include Chicago, Illinois, United States, Beijing, Beijing Municipality, China, Columbus, Ohio, United States. Updated daily from ClinicalTrials.gov.


Early Stage Breast Cancer Trials at a Glance

52 actively recruiting trials for early stage breast cancer are listed on ClinicalTrialsFinder across 6 cities in 18 countries. The largest study group is Not Applicable with 21 trials, with the heaviest enrollment activity in Chicago, Beijing, and Columbus. Lead sponsors running early stage breast cancer studies include German Cancer Research Center, Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins, and University of Illinois at Chicago.

Browse early stage breast cancer trials by phase

Treatments under study

About Early Stage Breast Cancer Clinical Trials

Looking for clinical trials for Early Stage Breast Cancer? There are currently 28 studies actively recruiting participants. Clinical trials offer access to new treatments before they are widely available, and every approved therapy in use today was first tested through a clinical trial.

Below you can browse trials, sign up for alerts when new Early Stage Breast Cancer trials open, and view eligibility criteria for each study. Each listing includes the study phase, locations, and enrollment details.

Frequently Asked Questions

Common questions about Early Stage Breast Cancer clinical trials

A clinical trial is a carefully designed research study that tests new medical treatments, drugs, devices, or approaches in human volunteers. Every approved medication and treatment available today was proven safe and effective through clinical trials.

All clinical trials are reviewed and approved by Institutional Review Boards (IRBs) — independent committees that evaluate patient safety. Trials follow strict protocols, and your health is monitored closely throughout. You can withdraw at any time.

Not necessarily. Many trials compare the new treatment against the current standard of care, meaning all participants receive active treatment. When placebos are used, they are typically combined with standard treatment, not given alone. The trial description will always specify the design.

Under the Affordable Care Act, most private insurers are required to cover routine patient care costs during a clinical trial. The sponsor typically covers the investigational treatment itself. Medicare also covers routine costs for qualifying trials.

Yes. Participation is completely voluntary. You can withdraw at any time, for any reason, without it affecting your access to standard medical care.

Each trial has specific eligibility criteria — including age, diagnosis, disease stage, prior treatments, and general health. Browse the trials listed above and check their eligibility sections. You can also contact the trial site directly to discuss your situation.

Showing 120 of 52 trials

Recruiting
Not Applicable

JUdicious Surveillance for Trastuzumab Induced Cardiotoxicity in the First Year

Breast CancerBreast Cancer Early Stage Breast Cancer (Stage 1-3)Cardiovascular Health+4 more
Women's College Hospital300 enrolled1 locationNCT06930521
Recruiting

Evaluating Minimal Residual Disease (MRD) Through Longitudinal Circulating Tumor DNA (ctDNA) Profiling in Breast Malignancies

Breast CancerTNBC - Triple-Negative Breast CancerEarly Stage Breast Cancer+2 more
Tempus AI900 enrolled14 locationsNCT07211178
Recruiting

Aspects of Adjuvant CDK4/6 Inhibitors in Older Breast Cancer Patients - Focusing on Geriatric Screening

Breast Cancer Early Stage Breast Cancer (Stage 1-3)Geriatric AssessmentAdjuvant Drug Therapy
Region Jönköping County200 enrolled5 locationsNCT07273357
Recruiting
Not Applicable

Outcomes and Cosmesis With Whole Breast Irradiation and Boost

Early Stage Breast Cancer
University of Wisconsin, Madison50 enrolled1 locationNCT06295744
Recruiting
Not Applicable

Single vs Hypofractionated Irradiation For Timely Access to Partial Breast Radiotherapy

Breast Cancer Early Stage Breast Cancer (Stage 1-3)
British Columbia Cancer Agency60 enrolled1 locationNCT06885671
Recruiting
Phase 2

FLASH-Breast: Evaluating the Efficacy of Fezolinetant in Reducing Vasomotor Symptoms in Women With Breast Cancer on Endocrine Therapy

Breast Cancer Early Stage Breast Cancer (Stage 1-3)
Yale University92 enrolled2 locationsNCT06917313
Recruiting
Phase 2

Fudan University Shanghai Cancer Center Breast Cancer Precision Platform Series Study- Neoadjuvant Therapy

Breast CancerBreast NeoplasmHER2-negative Breast Cancer+7 more
Fudan University716 enrolled1 locationNCT05582499
Recruiting
Phase 2

I-SPY TRIAL: Neoadjuvant and Personalized Adaptive Novel Agents to Treat Breast Cancer

Breast CancerBreast NeoplasmsHER2-negative Breast Cancer+8 more
QuantumLeap Healthcare Collaborative5,000 enrolled42 locationsNCT01042379
Recruiting
Not Applicable

Feasibility and Acceptibility of a Multi-site Trial of Time Restircted Eating During Chemotheraply for Breast Cancer.

Breast CancerBreast Cancer Early Stage Breast Cancer (Stage 1-3)Breast Neoplasm Female
University of Illinois at Chicago40 enrolled2 locationsNCT07387445
Recruiting
Not Applicable

Evaluation of Circulating Tumor Cells (CTC) Relevance in Breast Cancer Follow-up Using the ScreenCell Device

Breast Cancer MetastaticBreast Cancer Early Stage Breast Cancer (Stage 1-3)Breast Cancer Invasive
ScreenCell93 enrolled1 locationNCT06807502
Recruiting
Phase 2

Biolosion Combined Standard Neoadjuvant Therapy to Treat Triple-negative Breast Cancer

Breast CancerTriple Negative Breast Cancer(TNBC)Early Stage Breast Cancer+2 more
Sun Yat-sen University192 enrolled5 locationsNCT06768931
Recruiting
Not Applicable

Exercise Therapy to Improve Cardiovascular Health in Post-Menopausal Women After Treatment for Early Stage Breast Cancer

Early Stage Breast Cancer
Memorial Sloan Kettering Cancer Center152 enrolled2 locationsNCT04458532
Recruiting
Phase 2

Ultra Hypo-fractionated Adjuvant Whole Breast Radiation Therapy With Simultaneous Integrated Boost for Early-Stage Breast Cancer (H-ASSIST)

Breast CancerDuctal Carcinoma in SituEarly Stage Breast Cancer+1 more
UNC Lineberger Comprehensive Cancer Center90 enrolled1 locationNCT06902311
Recruiting
Not Applicable

Diagnostic HER2DX-guided Treatment for Patients wIth Early-stage HER2-positive Breast Cancer

HER2-positive Breast CancerEarly Stage Breast Cancer
Fundacio Clinic Barcelona304 enrolled29 locationsNCT06446882
Recruiting
Phase 2

Evaluating the Use of a Medication 'Switch' vs Guideline-directed Interventions for Relieving Side Effects of Aromatase Inhibitors Among Breast Cancer Patients

Breast CancerEarly Stage Breast CancerAdjuvant Treatment
Dartmouth-Hitchcock Medical Center62 enrolled1 locationNCT07071038
Recruiting

Evaluation of HER2DX Assay on Treatment Decisions in Patients With Early Stage HER2+ Breast Cancer: the HER2BREASTDX

Breast Cancer Early Stage Breast Cancer (Stage 1-3)
European Institute of Oncology60 enrolled1 locationNCT06723990
Recruiting
Phase 4

Evaluating Omission of Granulocyte Colony-stimulating Factors in Breast Cancer Patients Receiving Paclitaxel Portion of Dose-dense Adriamycin-cyclophosphamide and Paclitaxel Chemotherapy

Early Stage Breast Cancer
Ottawa Hospital Research Institute242 enrolled3 locationsNCT05753618
Recruiting
Phase 2Phase 3

Continuous Positive Airway Pressure (CPAP) Assisted Radiotherapy in Breast Cancer

Breast Cancer Early Stage Breast Cancer (Stage 1-3)
Universitaire Ziekenhuizen KU Leuven53 enrolled1 locationNCT07373782
Recruiting
Phase 2

ctDNA-Guided De-Escalation of Adjuvant Chemotherapy With Dalpiciclib in HR-Positive/HER2-Negative Breast Cancer

HER2-negative Breast CancerBreast Cancer Early Stage Breast Cancer (Stage 1-3)Hormone Receptor-Positive Breast Cancer+3 more
Peking University People's Hospital393 enrolled1 locationNCT06970912
Recruiting
Not Applicable

Multimodal Prehabilitation Program That Combines Physical Exercise, Psychological Intervention and Nutritional Support to Improve the Response to Neoadjuvant Chemoterhapy in Early Breast Cancer Patients

Breast Cancer Early Stage Breast Cancer (Stage 1-3)Prehabilitation
Hospital Clinic of Barcelona214 enrolled1 locationNCT07107594