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Showing 1–13 of 13 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Atypical Hyperplasia of the Breast Clear all
Recruiting Phase 2 Interventional Accepts healthy volunteers

Low Dose Tamoxifen With or Without Omega-3 Fatty Acids for Breast Cancer Risk Reduction

NCT06195306
View directory record Official record
Conditions
Breast Atypical Hyperplasia, Breast Carcinoma, Breast Ductal Carcinoma In Situ, Breast Lobular Carcinoma In Situ
Interventions
Biospecimen Collection, Mammography, Omega-3-Acid Ethyl Esters, Questionnaire Administration, Random Periareolar Fine-Needle Aspiration, Tamoxifen
Procedure · Drug · Other
Lead sponsor
National Cancer Institute (NCI)
NIH
Eligibility
45 Years to 74 Years · Female only
Enrollment
66 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2028
U.S. locations
3
States / cities
Kansas City, Kansas • Ann Arbor, Michigan • Columbus, Ohio
Source: ClinicalTrials.gov public record
Updated May 19, 2026 · Synced Jul 21, 2026, 10:18 PM EDT
Active, not recruiting Not applicable Interventional Accepts healthy volunteers

Making Informed Choices on Incorporating Chemoprevention Into Care (MiCHOICE)

NCT04496739
View directory record Official record
Conditions
Atypical Hyperplasia of the Breast, Lobular Breast Carcinoma In Situ, Pleomorphic Lobular Breast Carcinoma In Situ
Interventions
Cancer Educational Materials, Decision Aid, Interview, Questionnaire Administration
Behavioral · Other
Lead sponsor
SWOG Cancer Research Network
Network
Eligibility
Not listed
Enrollment
412 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2028
U.S. locations
96
States / cities
Antioch, California • Costa Mesa, California • Duarte, California + 67 more
Source: ClinicalTrials.gov public record
Updated Apr 6, 2026 · Synced Jul 21, 2026, 10:18 PM EDT
Completed No phase listed Observational

Upstaging of ALH/LCIS Found on Core Biopsy Based on Subsequent Excisional Biopsy

NCT00146536
View directory record Official record
Conditions
Breast Neoplasms
Interventions
Not listed
Lead sponsor
Dana-Farber Cancer Institute
Other
Eligibility
20 Years and older · Female only
Enrollment
78 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2004 – 2012
U.S. locations
2
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Mar 30, 2017 · Synced Jul 21, 2026, 10:18 PM EDT
Completed Phase 2 Interventional Results available

Protocol for Women at Increased Risk of Developing Breast Cancer

NCT00291135
View directory record Official record
Conditions
Breast Cancer
Interventions
letrozole
Drug
Lead sponsor
Carol Fabian, MD
Other
Eligibility
18 Years and older · Female only
Enrollment
42 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2003 – 2008
U.S. locations
1
States / cities
Kansas City, Kansas
Source: ClinicalTrials.gov public record
Updated Jun 14, 2016 · Synced Jul 21, 2026, 10:18 PM EDT
Completed No phase listed Observational

Atypical Lesions of the Breast: Close Observation Versus Excision (ALCOVE)

NCT01925586
View directory record Official record
Conditions
Atypical Ductal Hyperplasia (ADH) of the Breast
Interventions
Not listed
Lead sponsor
Yale University
Other
Eligibility
40 Years and older · Female only
Enrollment
9 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2018
U.S. locations
1
States / cities
New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Jan 27, 2019 · Synced Jul 21, 2026, 10:18 PM EDT
Terminated Phase 2 Interventional

Oral Tamoxifen vs. TamGel vs. Control in Women With Atypical Hyperplasia, Lobular Carcinoma In Situ, or Increased Breast Cancer Risk

NCT04570956
View directory record Official record
Conditions
Breast Atypical Hyperplasia, Breast Lobular Carcinoma in Situ, Breast Atypical Lobular Hyperplasia, Breast Carcinoma
Interventions
Tamoxifen, Topical 4-OHT( 4-hydroxytamoxifen)gel 4 mg/each breast/day, Placebo, Questionnaire Administration
Drug · Other
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years to 80 Years · Female only
Enrollment
65 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2024
U.S. locations
3
States / cities
Evanston, Illinois • Rochester, Minnesota • Camden, New Jersey
Source: ClinicalTrials.gov public record
Updated Jan 22, 2026 · Synced Jul 21, 2026, 10:18 PM EDT
Terminated Not applicable Interventional

Flaxseed in Preventing Breast Cancer in Premenopausal Women at Risk of Developing Breast Cancer

NCT00794989
View directory record Official record
Conditions
Breast Cancer, Precancerous Condition
Interventions
Ground Flaxseed, No Intervention
Dietary Supplement · Other
Lead sponsor
Roswell Park Cancer Institute
Other
Eligibility
21 Years to 50 Years · Female only
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2011
U.S. locations
2
States / cities
Chicago, Illinois • Buffalo, New York
Source: ClinicalTrials.gov public record
Updated Jun 2, 2016 · Synced Jul 21, 2026, 10:18 PM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Protocol for Women at Increased Risk of Developing Breast Cancer

NCT00291694
View directory record Official record
Conditions
Breast Cancer
Interventions
celecoxib, placebo
Drug · Other
Lead sponsor
Carol Fabian, MD
Other
Eligibility
18 Years and older · Female only
Enrollment
72 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2003 – 2009
U.S. locations
1
States / cities
Kansas City, Kansas
Source: ClinicalTrials.gov public record
Updated Nov 6, 2016 · Synced Jul 21, 2026, 10:18 PM EDT
Completed No phase listed Observational

Markers for Breast Cancer

NCT00339248
View directory record Official record
Conditions
Breast Cancer
Interventions
Not listed
Lead sponsor
National Cancer Institute (NCI)
NIH
Eligibility
15 Years and older · Female only
Enrollment
2,632 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
Started 2004
U.S. locations
1
States / cities
Frederick, Maryland
Source: ClinicalTrials.gov public record
Updated Mar 12, 2009 · Synced Jul 21, 2026, 10:18 PM EDT
Recruiting No phase listed Observational

Impact of Dietary Inflammatory Potential on Breast Cancer Risk

NCT05178498
View directory record Official record
Conditions
Breast Atypical Ductal Hyperplasia, Breast Atypical Lobular Hyperplasia, Breast Carcinoma, Breast Lobular Carcinoma In Situ, Breast Sclerosing Adenosis
Interventions
Follow-Up, Physical Examination, Questionnaire Administration
Procedure · Other
Lead sponsor
Ohio State University Comprehensive Cancer Center
Other
Eligibility
18 Years and older
Enrollment
960 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2035
U.S. locations
1
States / cities
Columbus, Ohio
Source: ClinicalTrials.gov public record
Updated Jun 11, 2026 · Synced Jul 21, 2026, 10:18 PM EDT
Completed No phase listed Observational

Breast Cancer Registry for Participants With Breast Cancer or Characteristics of Hereditary Breast Cancer

NCT00666731
View directory record Official record
Conditions
Breast Cancer, Precancerous Condition
Interventions
medical chart review, questionnaire administration, study of socioeconomic and demographic variables, Excess human biological tissue, quality-of-life assessment
Other · Procedure
Lead sponsor
University of Nebraska
Other
Eligibility
19 Years to 120 Years
Enrollment
4,945 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2016
U.S. locations
65
States / cities
Colorado Springs, Colorado • Denver, Colorado • Lakewood, Colorado + 46 more
Source: ClinicalTrials.gov public record
Updated Oct 9, 2023 · Synced Jul 21, 2026, 10:18 PM EDT
Recruiting Phase 2 Interventional

Acolbifene Versus Low Dose Tamoxifen for the Prevention of Breast Cancer in Premenopausal Women at High Risk for Development of Breast Cancer

NCT05941520
View directory record Official record
Conditions
Breast Atypical Hyperplasia, Breast Carcinoma, Breast Ductal Carcinoma In Situ, Breast Lobular Carcinoma In Situ
Interventions
Acolbifene Hydrochloride, Biospecimen Collection, Mammography, Questionnaire Administration, Random Periareolar Fine-Needle Aspiration, Tamoxifen
Drug · Procedure · Other
Lead sponsor
National Cancer Institute (NCI)
NIH
Eligibility
35 Years and older · Female only
Enrollment
80 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2028
U.S. locations
4
States / cities
Duarte, California • Chicago, Illinois • Kansas City, Kansas + 1 more
Source: ClinicalTrials.gov public record
Updated Jul 6, 2026 · Synced Jul 21, 2026, 10:18 PM EDT
Not listed No phase listed Observational

Women At Risk: The High Risk Breast Cancer Program

NCT01034891
View directory record Official record
Conditions
Breast Cancer
Interventions
Not listed
Lead sponsor
New York Presbyterian Hospital
Other
Eligibility
18 Years and older · Female only
Enrollment
2,000 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
Started 1991
U.S. locations
2
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Dec 17, 2009 · Synced Jul 21, 2026, 10:18 PM EDT