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ClinicalTrials.gov public records Last synced Oct 2, 2026, 2:06 PM EDT

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Showing 1–24 of 35 matching trials from the live ClinicalTrials.gov search.
Filters: Condition: Early Stage Estrogen Receptor (ER) Positive Breast Cancer Clear all
Withdrawn Not applicable Interventional

Circulating Tumor DNA Based Minimal Residual Disease Detection for Patients With Early-Stage Breast Cancer

NCT07136493
View directory record Official record
Conditions
Anatomic Stage I Breast Cancer AJCC v8, Anatomic Stage II Breast Cancer AJCC v8, Anatomic Stage III Breast Cancer AJCC v8, Estrogen Receptor-Positive Breast Carcinoma, HER2-Negative Breast Carcinoma, HER2-Positive Breast Carcinoma, Triple-Negative Breast Carcinoma
Interventions
Biospecimen Collection, Electronic Health Record Review, Survey Administration
Procedure · Other
Lead sponsor
City of Hope Medical Center
Other
Eligibility
18 Years and older
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026
U.S. locations
5
States / cities
Goodyear, Arizona • Duarte, California • Irvine, California + 2 more
Source: ClinicalTrials.gov public record
Updated Jun 25, 2026 · Synced Oct 2, 2026, 2:06 PM EDT
Suspended Phase 3 Interventional

Testing Low Dose Tamoxifen for Invasive Breast Cancer, LoTam Trial

NCT06671912
View directory record Official record
Conditions
Anatomic Stage 0 Breast Cancer AJCC v8, Anatomic Stage 1 Breast Cancer AJCC v8, Anatomic Stage IIA Breast Cancer AJCC v8, Estrogen Receptor-Positive Breast Carcinoma, HER2-Negative Breast Carcinoma, Breast Ductal Carcinoma In Situ, Breast Lobular Carcinoma In Situ
Interventions
Anastrozole, Letrozole, Exemestane, Tamoxifen, Mammogram, Magnetic Resonance Imaging, Dual X-ray Absorptiometry, Biospecimen Collection, Questionnaire Administration
Drug · Procedure · Biological + 1 more
Lead sponsor
Alliance for Clinical Trials in Oncology
Other
Eligibility
18 Years and older
Enrollment
1,556 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2031
U.S. locations
728
States / cities
Anchorage, Alaska • Gilbert, Arizona • Goodyear, Arizona + 559 more
Source: ClinicalTrials.gov public record
Updated Sep 2, 2026 · Synced Oct 2, 2026, 2:06 PM EDT
Completed Phase 3 Interventional Results available

S0927:Omega3-Fatty Acid Supp in Treating Muscle&Bone Pain&Stiffness in Pts W/Stg I,II,III Brst Canc Rec'v Hormone Thpy

NCT01385137
View directory record Official record
Conditions
Arthralgia, Breast Cancer, Pain
Interventions
omega-3 fatty acid, placebo
Dietary Supplement · Other
Lead sponsor
SWOG Cancer Research Network
Network
Eligibility
18 Years to 120 Years · Female only
Enrollment
262 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2014
U.S. locations
292
States / cities
Mobile, Alabama • Anchorage, Alaska • Fairbanks, Alaska + 215 more
Source: ClinicalTrials.gov public record
Updated Apr 7, 2017 · Synced Oct 2, 2026, 2:06 PM EDT
Active, not recruiting Phase 3 Interventional Results available

Higher Per Daily Treatment-Dose Radiation Therapy or Standard Per Daily Treatment Radiation Therapy in Treating Patients With Early-Stage Breast Cancer That Was Removed by Surgery

NCT01349322
View directory record Official record
Conditions
Breast Cancer
Interventions
Standard fractionation whole breast irradiation, Hypofractionated whole breast irradiation, Concurrent boost, Sequential boost
Radiation
Lead sponsor
Radiation Therapy Oncology Group
Network
Eligibility
18 Years and older · Female only
Enrollment
2,354 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
Started 2011
U.S. locations
386
States / cities
Birmingham, Alabama • Scottsdale, Arizona • Tucson, Arizona + 304 more
Source: ClinicalTrials.gov public record
Updated Mar 5, 2026 · Synced Oct 2, 2026, 2:06 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Effects of Chemotherapy on the Brain in Women With Newly Diagnosed Early-Stage Breast Cancer

NCT00755313
View directory record Official record
Conditions
Breast Cancer, Chemotherapeutic Agent Toxicity, Cognitive/Functional Effects, Fatigue, Long-term Effects Secondary to Cancer Therapy in Adults, Neurotoxicity, Psychosocial Effects of Cancer and Its Treatment
Interventions
trastuzumab, aromatase inhibition therapy, carboplatin, cyclophosphamide, docetaxel, doxorubicin hydrochloride, metabolic assessment, questionnaire administration, study of socioeconomic and demographic variables, cognitive assessment, positron emission tomography, fludeoxyglucose F 18
Biological · Drug · Other + 2 more
Lead sponsor
University of California, San Francisco
Other
Eligibility
35 Years to 80 Years · Female only
Enrollment
81 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007 – 2014
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Nov 24, 2017 · Synced Oct 2, 2026, 2:06 PM EDT
Completed Phase 3 Interventional Results available

S1202: Duloxetine Hydrochloride for Muscle/Joint Pain in Early-Stage Breast Cancer Receiving Hormone Therapy

NCT01598298
View directory record Official record
Conditions
Breast Cancer, Musculoskeletal Complications, Pain
Interventions
duloxetine hydrochloride, placebo
Drug · Other
Lead sponsor
SWOG Cancer Research Network
Network
Eligibility
Up to 120 Years · Female only
Enrollment
299 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2018
U.S. locations
714
States / cities
Anchorage, Alaska • Fairbanks, Alaska • Jonesboro, Arkansas + 475 more
Source: ClinicalTrials.gov public record
Updated Dec 16, 2022 · Synced Oct 2, 2026, 2:06 PM EDT
Active, not recruiting Phase 3 Interventional

Phase III Study to Assess AZD9833+ CDK4/6 Inhibitor in HR+/HER2-MBC With Detectable ESR1m Before Progression (SERENA-6)

NCT04964934
View directory record Official record
Conditions
ER-Positive HER2-Negative Breast Cancer
Interventions
AZD9833, AZD9833 Placebo, Anastrozole, Anastrozole placebo, Letrozole, Letrozole placebo, Palbociclib, Abemaciclib, Luteinizing hormone-releasing hormone (LHRH) agonist, Ribociclib
Drug
Lead sponsor
AstraZeneca
Industry
Eligibility
18 Years to 130 Years
Enrollment
315 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2028
U.S. locations
64
States / cities
Phoenix, Arizona • Hot Springs, Arkansas • Little Rock, Arkansas + 56 more
Source: ClinicalTrials.gov public record
Updated Sep 23, 2026 · Synced Oct 2, 2026, 2:06 PM EDT
Completed Phase 2 Interventional Results available

Eribulin in Combination With Capecitabine for Adjuvant Treatment in Estrogen Receptor-Positive Early Stage Breast Cancer

NCT01439282
View directory record Official record
Conditions
Estrogen Receptor Positive Tumor, Breast Cancer
Interventions
eribulin mesylate, capecitabine
Drug
Lead sponsor
Eisai Inc.
Industry
Eligibility
18 Years and older
Enrollment
77 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2014
U.S. locations
23
States / cities
Tucson, Arizona • Orlando, Florida • Marietta, Georgia + 16 more
Source: ClinicalTrials.gov public record
Updated Jun 22, 2023 · Synced Oct 2, 2026, 2:06 PM EDT
Withdrawn Phase 1 Interventional

Dose Optimization of Rosuvastatin in Early Stage and Metastatic Estrogen Receptor Positive Breast Cancer Patients on Endocrine Therapy

NCT02483871
View directory record Official record
Conditions
Breast Cancer
Interventions
Rosuvastatin
Drug
Lead sponsor
Duke University
Other
Eligibility
Female only
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2017
U.S. locations
1
States / cities
Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated Jun 5, 2017 · Synced Oct 2, 2026, 2:06 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Evaluation of Endocrine Therapy Effects of Host Immunity in Early Stage Breast Cancer

NCT03719495
View directory record Official record
Conditions
Breast Cancer, Estrogen Receptor-positive Breast Cancer, Healthy
Interventions
Not listed
Lead sponsor
Duke University
Other
Eligibility
18 Years to 75 Years · Female only
Enrollment
68 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2023
U.S. locations
1
States / cities
Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated May 16, 2024 · Synced Oct 2, 2026, 2:06 PM EDT
Completed Phase 2 Interventional Results available

Accelerated Partial Breast Radiation Therapy Using High-Dose Rate Brachytherapy in Treating Patients With Early Stage Breast Cancer After Surgery

NCT02526498
View directory record Official record
Conditions
Ductal Breast Carcinoma In Situ, Estrogen Receptor Positive, Invasive Breast Carcinoma, Progesterone Receptor Positive, Stage IA Breast Cancer, Stage IB Breast Cancer, Stage IIA Breast Cancer
Interventions
Accelerated Partial Breast Irradiation, High-Dose Rate Brachytherapy, Questionnaire Administration
Radiation · Other
Lead sponsor
Rutgers, The State University of New Jersey
Other
Eligibility
45 Years and older · Female only
Enrollment
200 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2021
U.S. locations
10
States / cities
Gilbert, Arizona • La Jolla, California • Royal Oak, Michigan + 6 more
Source: ClinicalTrials.gov public record
Updated May 15, 2023 · Synced Oct 2, 2026, 2:06 PM EDT
Completed Not applicable Interventional

S1200: Acupuncture, Sham Acupuncture, or Wait List for Joint Symptoms Related to Aromatase Inhibitors in Pts W/Early-Stage Breast Cancer

NCT01535066
View directory record Official record
Conditions
Breast Cancer, Pain
Interventions
acupuncture therapy, sham acupuncture
Procedure
Lead sponsor
SWOG Cancer Research Network
Network
Eligibility
18 Years and older · Female only
Enrollment
226 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2018
U.S. locations
47
States / cities
Antioch, California • Fremont, California • Los Angeles, California + 36 more
Source: ClinicalTrials.gov public record
Updated Dec 7, 2022 · Synced Oct 2, 2026, 2:06 PM EDT
Completed Phase 2 Interventional

Fulvestrant (FASLODEX™) as a Treatment in Postmenopausal Women With Estrogen Receptor Positive Breast Cancer

NCT00093002
View directory record Official record
Conditions
Breast Cancer
Interventions
Fulvestrant
Drug
Lead sponsor
AstraZeneca
Industry
Eligibility
Female only
Enrollment
179 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2004 – 2007
U.S. locations
7
States / cities
Little Rock, Arkansas • Boston, Massachusetts • Winchester, Massachusetts + 4 more
Source: ClinicalTrials.gov public record
Updated Jun 12, 2008 · Synced Oct 2, 2026, 2:06 PM EDT
Active, not recruiting Phase 2 Interventional

Clinical Trial Assessing the Safety of Neoadjuvant Palbociclib in Combination With Endocrine Therapy

NCT05069038
View directory record Official record
Conditions
Breast Cancer
Interventions
Palbociclib 125mg
Drug
Lead sponsor
University of Nebraska
Other
Eligibility
19 Years and older · Female only
Enrollment
51 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2032
U.S. locations
1
States / cities
Omaha, Nebraska
Source: ClinicalTrials.gov public record
Updated Aug 19, 2026 · Synced Oct 2, 2026, 2:06 PM EDT
Active, not recruiting Phase 3 Interventional

Study of Pembrolizumab (MK-3475) Versus Placebo in Combination With Neoadjuvant Chemotherapy & Adjuvant Endocrine Therapy in the Treatment of Early-Stage Estrogen Receptor-Positive, Human Epidermal Growth Factor Receptor 2-Negative (ER+/HER2-) Breast Cancer (MK-3475-756/KEYNOTE-756)

NCT03725059
View directory record Official record
Conditions
Breast Cancer
Interventions
Pembrolizumab (K), Placebo (P), Paclitaxel (X), Doxorubicin (A), Epirubicin (E), Cyclophosphamide (C), Endocrine therapy, Radiation therapy, Surgery
Biological · Drug · Radiation + 1 more
Lead sponsor
Merck Sharp & Dohme LLC
Industry
Eligibility
18 Years and older
Enrollment
1,240 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2031
U.S. locations
45
States / cities
Daphne, Alabama • Goodyear, Arizona • Tucson, Arizona + 39 more
Source: ClinicalTrials.gov public record
Updated Jul 11, 2025 · Synced Oct 2, 2026, 2:06 PM EDT
Completed Not applicable Interventional

Assessment of the Decision-making Impact of the Breast Cancer Index in Recommending Extended Adjuvant Endocrine Therapy for Patients With Early Stage ER-positive Breast Cancer

NCT02057029
View directory record Official record
Conditions
Breast Cancer, Early Stage Estrogen Receptor (ER) Positive Breast Cancer
Interventions
BCI Assay Results
Behavioral
Lead sponsor
Yale University
Other
Eligibility
Female only
Enrollment
96 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2015
U.S. locations
1
States / cities
New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Jan 8, 2016 · Synced Oct 2, 2026, 2:06 PM EDT
Completed Phase 2 Interventional Results available

A Study to Evaluate the Efficacy, Safety, and Pharmacokinetics of Giredestrant Plus Palbociclib Compared With Anastrozole Plus Palbociclib for Postmenopausal Women With Estrogen Receptor-Positive and HER2-Negative Untreated Early Breast Cancer (coopERA Breast Cancer)

NCT04436744
View directory record Official record
Conditions
Early Breast Cancer
Interventions
Giredestrant, Anastrozole, Palbociclib, Surgery
Drug · Procedure
Lead sponsor
Hoffmann-La Roche
Industry
Eligibility
18 Years and older · Female only
Enrollment
221 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2021
U.S. locations
10
States / cities
Burbank, California • Laguna Hills, California • San Luis Obispo, California + 7 more
Source: ClinicalTrials.gov public record
Updated Feb 2, 2023 · Synced Oct 2, 2026, 2:06 PM EDT
Completed No phase listed Observational

Prospective Observational Study Evaluating Treatment Decision Impact of Prosigna® in Early Stage Breast Cancer Patients

NCT02625935
View directory record Official record
Conditions
Breast Cancer
Interventions
Not listed
Lead sponsor
NanoString Technologies, Inc.
Industry
Eligibility
Female only
Enrollment
206 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2017
U.S. locations
4
States / cities
Fort Myers, Florida • Scarborough, Maine • Bethesda, Maryland + 1 more
Source: ClinicalTrials.gov public record
Updated Oct 13, 2017 · Synced Oct 2, 2026, 2:06 PM EDT
Terminated Phase 2 Interventional Results available

Radiation Therapy in Treating Post-Menopausal Women With Early Stage Breast Cancer Undergoing Surgery

NCT01754519
View directory record Official record
Conditions
Ductal Breast Carcinoma In Situ, Estrogen Receptor Negative, Estrogen Receptor Positive, HER2/Neu Negative, Invasive Cribriform Breast Carcinoma, Invasive Ductal Carcinoma, Not Otherwise Specified, Lobular Breast Carcinoma In Situ, Mucinous Breast Carcinoma, Papillary Breast Carcinoma, Progesterone Receptor Positive, Stage I Breast Cancer, Stage II Breast Cancer, Stage IIIA Breast Cancer, Stage IIIC Breast Cancer, Tubular Breast Carcinoma
Interventions
Therapeutic Conventional Surgery, Radiation Therapy, Laboratory Biomarker Analysis, Quality-of-Life Assessment
Procedure · Radiation · Other
Lead sponsor
Roswell Park Cancer Institute
Other
Eligibility
50 Years and older · Female only
Enrollment
1 participant
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2015
U.S. locations
1
States / cities
Buffalo, New York
Source: ClinicalTrials.gov public record
Updated Jul 7, 2017 · Synced Oct 2, 2026, 2:06 PM EDT
Recruiting No phase listed Observational

Active Surveillance in Older Women With ER+ Breast Cancer

NCT07262138
View directory record Official record
Conditions
Early Stage Estrogen Receptor (ER) Positive Breast Cancer
Interventions
Active Surveillance
Other
Lead sponsor
University of Pittsburgh
Other
Eligibility
70 Years and older · Female only
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2030
U.S. locations
1
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Sep 11, 2026 · Synced Oct 2, 2026, 2:06 PM EDT
Completed Not applicable Interventional

Intensity Modulated Accelerated Partial Breast Irradiation Before Surgery in Treating Older Patients With Hormone Responsive Stage 0-I Breast Cancer

NCT02186470
View directory record Official record
Conditions
Estrogen Receptor-positive Breast Cancer, Invasive Ductal Breast Carcinoma, Invasive Ductal Breast Carcinoma With Predominant Intraductal Component, Medullary Ductal Breast Carcinoma With Lymphocytic Infiltrate, Mucinous Ductal Breast Carcinoma, Papillary Ductal Breast Carcinoma, Progesterone Receptor-positive Breast Cancer, Stage IA Breast Cancer, Stage IB Breast Cancer, Tubular Ductal Breast Carcinoma
Interventions
accelerated partial breast irradiation, intensity-modulated radiation therapy, image-guided radiation therapy, therapeutic conventional surgery
Radiation · Procedure
Lead sponsor
Ohio State University Comprehensive Cancer Center
Other
Eligibility
50 Years and older · Female only
Enrollment
22 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2025
U.S. locations
1
States / cities
Columbus, Ohio
Source: ClinicalTrials.gov public record
Updated Sep 22, 2025 · Synced Oct 2, 2026, 2:06 PM EDT
Completed Not applicable Interventional

S1105: Text-Messaging Intervention to Reduce Early Discontinuation of AI Therapy in Women With Early-Stage Breast Cancer

NCT01515800
View directory record Official record
Conditions
Breast Cancer
Interventions
Text message reminder
Behavioral
Lead sponsor
SWOG Cancer Research Network
Network
Eligibility
18 Years to 120 Years · Female only
Enrollment
724 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2018
U.S. locations
204
States / cities
Anchorage, Alaska • Fort Smith, Arkansas • Little Rock, Arkansas + 144 more
Source: ClinicalTrials.gov public record
Updated Mar 8, 2018 · Synced Oct 2, 2026, 2:06 PM EDT
Recruiting Phase 3 Interventional

A Study of Elacestrant Versus Standard Endocrine Therapy in Women and Men With ER+,HER2-, Early Breast Cancer With High Risk of Recurrence

NCT06492616
View directory record Official record
Conditions
Breast Cancer
Interventions
Elacestrant, Anastrozole, Letrozole, Exemestane, Tamoxifen
Drug
Lead sponsor
Stemline Therapeutics, Inc.
Industry
Eligibility
18 Years and older
Enrollment
4,220 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2032
U.S. locations
176
States / cities
Daphne, Alabama • Chandler, Arizona • Gilbert, Arizona + 139 more
Source: ClinicalTrials.gov public record
Updated Sep 15, 2026 · Synced Oct 2, 2026, 2:06 PM EDT
Completed Phase 2 Interventional Results available

A Trial Using ARV-471 or Anastrozole in Post-Menopausal Women With Breast Cancer Prior to Surgery

NCT05549505
View directory record Official record
Conditions
Breast Cancer
Interventions
ARV-471, Anastrozole, Surgical resection of breast tumor
Drug · Procedure
Lead sponsor
Arvinas Inc.
Industry
Eligibility
18 Years and older · Female only
Enrollment
152 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2024
U.S. locations
13
States / cities
Springdale, Arkansas • Los Angeles, California • Torrance, California + 10 more
Source: ClinicalTrials.gov public record
Updated Aug 29, 2025 · Synced Oct 2, 2026, 2:06 PM EDT