Medical Information Only. Consult your healthcare provider before considering clinical trial enrollment.
Stage I Breast Cancer: full-pipeline trial registry
5 of 12 indexed Stage I Breast Cancer trials are currently recruiting.
Corpus placement: #1,429 of 28,707 conditions by registered trial count.
12 US clinical trials · 5 currently recruiting · #1,429 of 28,707 conditions by registered trial count
Stage I Breast Cancer: 12 US clinical trials tracked, 5 recruiting.
Stage I Breast Cancer is the subject of 12 registered US clinical trials on ClinicalTrials.gov, 5 of them currently open to new participants. 2 are in Phase 3-4 (later-stage) and 3 in Phase 1-2 (earlier-stage). The most active sponsor is Memorial Sloan Kettering Cancer Center, running 3 of these trials.
Enrollment posture brief
Registry condition stage-i-breast-cancer
OPEN 5 | RECR 42% | LATE 2 | EARLY 3 | RANK #1429 | SPON 3
Volume-matched condition peers
Nearest open-share peer: Adiposity (42% recruiting · 12 trials)
Stage I Breast Cancer lists 5 open slots (42% of 12 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 Stage I Breast Cancer 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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Stage I Breast Cancer is recruiting below its size-band peers.
5 of 12 indexed trials (41.7%) 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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One sponsor concentrates Stage I Breast Cancer research.
Memorial Sloan Kettering Cancer Center accounts for 3 of 12 trials (25%). 9 distinct sponsors appear on at least one study for this condition label.
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Most Stage I Breast Cancer trials plan to enrol fewer than 100 people.
Median target enrolment is 60 among the 12 trials that report a genuine target (sentinel values excluded). 8 of those (66.7%) plan for fewer than 100 participants.
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Stage I Breast Cancer research is mostly interventional.
12 interventional and 0 observational studies make up this index (100% interventional). Study type is sponsor-reported on ClinicalTrials.gov.
Open and recent trials
12 total, page 1 of 1
De-Escalation of Breast Radiation Trial for Hormone Sensitive, HER-2 Negative, Oncotype Recurrence Score Less Than or Equal to 18 Breast Cancer (DEBRA)
NRG Oncology
NCT04852887
TeleHealth Resistance Exercise Intervention to Preserve Dose Intensity and Vitality in Elder Breast Cancer Patients
Dana-Farber Cancer Institute
NCT05535192
Improving Exercise Capacity With a Tailored Physical Activity Intervention
Wake Forest University Health Sciences
NCT05595577
A Study of Revaree Plus in People With Breast Cancer
Memorial Sloan Kettering Cancer Center
NCT07042581
A Study of Disappearing Markers for Daily Radiation Treatment Delivery for Breast Cancer Patients.
Barbara Ann Karmanos Cancer Institute
NCT07095114
Single Fraction Accelerated Partial Breast Irradiation vs. Five Fraction Accelerated Partial Breast Irradiation for Low-risk Stage 0 and I Breast Carcinoma
Washington University School of Medicine
NCT04849871
Niraparib + Dostarlimab In BRCA Mutated Breast Cancer
Dana-Farber Cancer Institute
NCT04584255
Acupuncture Pilot Study for Cancer-related Cognitive Function
Memorial Sloan Kettering Cancer Center
NCT04007770
Researching the Effect of Exercise on Cancer
Memorial Sloan Kettering Cancer Center
NCT04589468
Cytoxan, Epirubicin and Capecitabine in Women With Breast Cancer
Craig A. Bunnell, MD, MPH
NCT00146588
Defined Green Tea Catechin Extract in Treating Women With Hormone Receptor Negative Stage I-III Breast Cancer
National Cancer Institute (NCI)
NCT00516243
Living Well After Breast Surgery
University of Texas at Austin
NCT03834532
Phase Distribution
| Phase | Trial count |
|---|---|
| Phase 1 | 1 |
| Phase 2 | 2 |
| Phase 3 | 1 |
| Phase 4 | 1 |
Top Sponsors
Named interventions
Most-linked intervention names on Stage I Breast Cancer records (sponsor-reported on ClinicalTrials.gov). Counts are trial links, not unique products.
US sites by state
Facility locations filed on Stage I Breast Cancer 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 Stage I Breast Cancer page
12 registered trials, 5 currently recruiting, is a starting point for a conversation, not a diagnosis or a recommendation.
- 5 Stage I Breast Cancer trials are currently recruiting, check eligibility criteria before contacting a site. Browse recruiting trials
- Memorial Sloan Kettering Cancer Center sponsors the most Stage I Breast Cancer trials on record, review their full trial history before evaluating a specific study. See Memorial Sloan Kettering Cancer Center'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 Stage I Breast Cancer condition card totals 12 registered trials; most-linked intervention Educational website; 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.