Oral Tamoxifen vs. TamGel vs. Control in Women With Atypical Hyperplasia, Lobular Carcinoma In Situ, or Increased Breast Cancer Risk
Public ClinicalTrials.gov record NCT04570956. Field values are reproduced from the official study page; the official ClinicalTrials.gov record remains the source of truth for eligibility, enrollment, and contact information.
Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.
Official title
Phase IIB Randomized Trial of Oral Tamoxifen vs. Topical 4-hydroxytamoxifen Gel vs. Control in Women With Atypical Hyperplasia, Lobular Carcinoma in Situ, or Increased Breast Cancer Risk
Study identification
- NCT ID
- NCT04570956
- Recruitment status
- Terminated
- Study type
- Interventional
- Phase
- Phase 2
- Lead sponsor
- Mayo Clinic
- Other
- Enrollment
- 65 participants
Conditions and interventions
Conditions
Interventions
- Placebo Drug
- Questionnaire Administration Other
- Tamoxifen Drug
- Topical 4-OHT( 4-hydroxytamoxifen)gel 4 mg/each breast/day Drug
Drug · Other
Eligibility (public fields only)
- Age range
- 18 Years to 80 Years
- Sex
- Female
- Healthy volunteers
- Healthy volunteers not accepted
This page does not interpret eligibility. Detailed inclusion and exclusion criteria are on the official ClinicalTrials.gov record.
Study timeline
- Start date
- Jul 25, 2021
- Primary completion
- Oct 14, 2024
- Completion
- Oct 14, 2024
- Last update posted
- Jan 22, 2026
2021 – 2024
United States locations
- U.S. sites
- 3
- U.S. states
- 3
- U.S. cities
- 3
| Facility | City | State | ZIP | Site status |
|---|---|---|---|---|
| Northwestern University | Evanston | Illinois | 60208 | — |
| Mayo Clinic | Rochester | Minnesota | 55905 | — |
| MD Anderson Cancer center at Cooper | Camden | New Jersey | 08103 | — |
Site contact phone numbers, emails, and investigator names are intentionally not displayed here. Open the official ClinicalTrials.gov record for site contact information.
About this trial record page
- What this page shows
- Public field values for ClinicalTrials.gov record NCT04570956, including study identification, conditions, interventions, eligibility (age, sex, healthy volunteer), timeline, and U.S. site list.
- What this page does not do
- No medical advice, eligibility judgments, treatment recommendations, study quality scoring, or AI-generated medical summaries. No site contact phone numbers, emails, or investigator names.
- Where the data comes from
- Sourced from the official ClinicalTrials.gov public API. The official record is the source of truth.
- Last refresh
- Last update posted Jan 22, 2026 · Synced May 17, 2026
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Open the official record
The complete protocol, eligibility criteria, and contact information for NCT04570956 live on ClinicalTrials.gov.