Medical Information Only. Consult your healthcare provider before considering clinical trial enrollment.
Breast Cancer Stage I: early-phase trial registry
9 of 19 indexed Breast Cancer Stage I trials are currently recruiting, with more weight in Phase 1-2.
Corpus placement: #902 of 28,707 conditions by registered trial count.
19 US clinical trials · 9 currently recruiting · #902 of 28,707 conditions by registered trial count
Breast Cancer Stage I: 19 US clinical trials tracked, 9 recruiting.
Breast Cancer Stage I is the subject of 19 registered US clinical trials on ClinicalTrials.gov, 9 of them currently open to new participants. 1 are in Phase 3-4 (later-stage) and 6 in Phase 1-2 (earlier-stage). The most active sponsor is Alliance for Clinical Trials in Oncology, running 2 of these trials.
Enrollment posture brief
Registry condition breast-cancer-stage-i
OPEN 9 | RECR 47% | LATE 1 | EARLY 6 | RANK #902 | SPON 2
Volume-matched condition peers
Nearest open-share peer: Breast Reconstruction (47% recruiting · 19 trials)
Breast Cancer Stage I lists 9 open slots (47% of 19 indexed trials). Peers are matched on registered volume, not therapeutic-area browse lists. How peer matching works →
Key findings
What ClinicalTrials.gov does not surface for Breast Cancer Stage I on its own pages , computed from the registry mirror as of 2026-08-08. Each line carries its own denominator so it can be quoted as it stands.
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Breast Cancer Stage I recruits in line with its size-band peers.
9 of 19 indexed trials (47.4%) are open to enrollment, against a 46.5% average across 27,806 conditions with fewer than 20 trials. The peer set uses the same ClinicalTrials.gov-derived counts as this page.
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Sponsorship of Breast Cancer Stage I trials is spread across many organizations.
Alliance for Clinical Trials in Oncology accounts for 2 of 19 trials (10.5%). 16 distinct sponsors appear on at least one study for this condition label.
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Most Breast Cancer Stage I trials plan to enrol fewer than 100 people.
Median target enrolment is 86 among the 19 trials that report a genuine target (sentinel values excluded). 12 of those (63.2%) plan for fewer than 100 participants.
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Breast Cancer Stage I research is mostly interventional.
17 interventional and 2 observational studies make up this index (89.5% interventional). Study type is sponsor-reported on ClinicalTrials.gov.
Open and recent trials
19 total, page 1 of 1
Optimizing Surgical Decisions in Young Adults With Breast Cancer
Weill Medical College of Cornell University
NCT06275126
Effect of Meal Timing During Cancer Treatment in Patients in Alaska: A Randomized Clinical Trial
Fred Hutchinson Cancer Center
NCT06802172
Evaluation of Radiobiological Effects in Skin Toxicities for Breast Cancer Patients With Pencil Beam Scanning Proton Therapy
Covenant Health Cancer Center
NCT06006806
Memantine and Exercise to Improve Cognitive Function and Modulate Biological Pathways of Cognitive Decline During Chemotherapy in Breast Cancer
UNC Lineberger Comprehensive Cancer Center
NCT06727773
Predicting Response to Neoadjuvant Endocrine Therapy (Neo-PREDICT)
George Washington University
NCT06806930
Tart Cherry Juice as a Dietary Supplement for the Prevention of Paclitaxel-Induced Neuropathy
University of California, Davis
NCT06268665
Adjuvant Chemoradiation and Biomarkers of Response in High-risk Breast Cancer
University of Virginia
NCT05288777
Medical Imaging and Thermal Treatment for Breast Tumors Using Harmonic Motion Imaging (HMI)
Columbia University
NCT05219695
A Study of the TheraBionic P1 Device in Breast Cancer
Barbara Ann Karmanos Cancer Institute
NCT07218432
Increasing Patients' Engagement in Breast Cancer Surgery Decision-Making
Alliance for Clinical Trials in Oncology
NCT03766009
Axillary Reverse Mapping in Preventing Lymphedema in Patients With Breast Cancer Undergoing Axillary Lymph Node Dissection
Alliance for Clinical Trials in Oncology
NCT03927027
Vaccine to Prevent Recurrence in Patients With HER-2 Positive Breast Cancer
H. Lee Moffitt Cancer Center and Research Institute
NCT03384914
Taking AIM at Breast Cancer
Dana-Farber Cancer Institute
NCT04720209
Safety of Lower Scalp Cooling Temperature to Prevent Hair Loss From Chemotherapy in Breast Cancer Patients
Memorial Sloan Kettering Cancer Center
NCT04180579
CARE (Chemotherapy Alopecia REduction)
George Washington University
NCT07201389
Study of Cardiopulmonary Exercise Testing in Women Who Have HER2-Positive Breast Cancer With Mild Cardiotoxicity
Memorial Sloan Kettering Cancer Center
NCT05036252
Abbreviated MBCT for Depression in Older African American/Black Breast Cancer Survivors
Case Comprehensive Cancer Center
NCT06336538
Quantitation of Endothelial Progenitor Cells as Markers of Tumor Angiogenesis in Breast Cancer
Indiana University School of Medicine
NCT00393341
Effect of Omega 3 on Atrophic Vaginitis in Breast Cancer Survivors
Ohio State University Comprehensive Cancer Center
NCT02150525
Phase Distribution
| Phase | Trial count |
|---|---|
| Phase 2 | 6 |
| Phase 3 | 1 |
Top Sponsors
Named interventions
Most-linked intervention names on Breast Cancer Stage I records (sponsor-reported on ClinicalTrials.gov). Counts are trial links, not unique products.
US sites by state
Facility locations filed on Breast Cancer Stage I trials. A trial with sites in several states counts in each.
Source: ClinicalTrials.gov, National Library of Medicine. Data is informational only.
Related
What to do with this Breast Cancer Stage I page
19 registered trials, 9 currently recruiting, is a starting point for a conversation, not a diagnosis or a recommendation.
- 9 Breast Cancer Stage I trials are currently recruiting, check eligibility criteria before contacting a site. Browse recruiting trials
- Alliance for Clinical Trials in Oncology sponsors the most Breast Cancer Stage I trials on record, review their full trial history before evaluating a specific study. See Alliance for Clinical Trials in Oncology's trials
- Bring the specific trial ID (NCT number) to your own doctor before enrolling, this page is a directory, not medical guidance. Read the trial-finding guide
Trial and recruiting counts reflect ClinicalTrials.gov registry status as of the data vintage above; individual trial eligibility and enrollment status can change.
Every figure on PlainTrial is rendered directly from the ClinicalTrials.gov registry, no number is typed in by an editor. This Breast Cancer Stage I condition card totals 19 registered trials; most-linked intervention Questionnaire Administration; top US site state New York. See our editorial standards & corrections policy, the methodology behind these numbers, the data changelog, or report a data error.