Medical Information Only. Consult your healthcare provider before considering clinical trial enrollment.
Estrogen Receptor-Positive Breast Carcinoma: early-phase trial registry
6 of 6 indexed Estrogen Receptor-Positive Breast Carcinoma trials are currently recruiting, with more weight in Phase 1-2.
Corpus placement: #2,866 of 28,707 conditions by registered trial count.
6 US clinical trials · 6 currently recruiting · #2,866 of 28,707 conditions by registered trial count
Estrogen Receptor-Positive Breast Carcinoma: 6 US clinical trials tracked, 6 recruiting.
Estrogen Receptor-Positive Breast Carcinoma is the subject of 6 registered US clinical trials on ClinicalTrials.gov, 6 of them currently open to new participants. 0 are in Phase 3-4 (later-stage) and 5 in Phase 1-2 (earlier-stage). The most active sponsor is Mayo Clinic, running 3 of these trials.
Enrollment posture brief
Registry condition estrogen-receptor-positive-breast-carcinoma
OPEN 6 | RECR 100% | LATE 0 | EARLY 5 | RANK #2866 | SPON 3
Volume-matched condition peers
Nearest open-share peer: Aortic Arch Aneurysm (100% recruiting · 5 trials)
Estrogen Receptor-Positive Breast Carcinoma lists 6 open slots (100% of 6 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 Estrogen Receptor-Positive Breast Carcinoma 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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Estrogen Receptor-Positive Breast Carcinoma is recruiting above its size-band peers.
6 of 6 indexed trials (100%) 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 Estrogen Receptor-Positive Breast Carcinoma research.
Mayo Clinic accounts for 3 of 6 trials (50%). 3 distinct sponsors appear on at least one study for this condition label.
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Most Estrogen Receptor-Positive Breast Carcinoma trials plan to enrol fewer than 100 people.
Median target enrolment is 40 among the 6 trials that report a genuine target (sentinel values excluded). 5 of those (83.3%) plan for fewer than 100 participants.
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Estrogen Receptor-Positive Breast Carcinoma research is mostly interventional.
5 interventional and 1 observational studies make up this index (83.3% interventional). Study type is sponsor-reported on ClinicalTrials.gov.
Open and recent trials
6 total, page 1 of 1
Finding the Best Tamoxifen Dose for Breast Cancer Risk Reduction in Premenopausal Women, RENAISSANCE Trial
National Cancer Institute (NCI)
NCT06184750
Reishi Mushroom Extract for Fatigue and/or Arthralgias/Myalgias in Patients With Breast Cancer on Aromatase Inhibitors
Mayo Clinic
NCT06028022
Turkey Tail Mushroom for Treating Post-Menopausal Women With HER2-Negative ER-Positive Breast Cancer Undergoing Surgery
Mayo Clinic
NCT06450873
High Cannabidiol Plant Extract (BRC-001) to Improve Aromatase Inhibitor-Induced Arthralgia in Women With Breast Cancer
City of Hope Medical Center
NCT06538389
Enhancing Skin Appearance and Quality of Life in Breast Cancer Survivors on Aromatase Inhibitor Therapy
Mayo Clinic
NCT06401889
Stereotactic Body Radiation Therapy and FES PET/CT Imaging for the Treatment of Oligoprogressive Estrogen Receptor Positive Metastatic Breast Cancer
City of Hope Medical Center
NCT06260033
Phase Distribution
| Phase | Trial count |
|---|---|
| Phase 2 | 5 |
Top Sponsors
Named interventions
Most-linked intervention names on Estrogen Receptor-Positive Breast Carcinoma records (sponsor-reported on ClinicalTrials.gov). Counts are trial links, not unique products.
US sites by state
Facility locations filed on Estrogen Receptor-Positive Breast Carcinoma 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 Estrogen Receptor-Positive Breast Carcinoma page
6 registered trials, 6 currently recruiting, is a starting point for a conversation, not a diagnosis or a recommendation.
- 6 Estrogen Receptor-Positive Breast Carcinoma trials are currently recruiting, check eligibility criteria before contacting a site. Browse recruiting trials
- Mayo Clinic sponsors the most Estrogen Receptor-Positive Breast Carcinoma trials on record, review their full trial history before evaluating a specific study. See Mayo Clinic'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 Estrogen Receptor-Positive Breast Carcinoma condition card totals 6 registered trials; most-linked intervention Questionnaire Administration; top US site state California. See our editorial standards & corrections policy, the methodology behind these numbers, the data changelog, or report a data error.