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Showing 25–48 of 24 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Estrogen Receptor-Positive Clear all
Completed Phase 2 Interventional Results available

Study Of Letrozole With Or Without Palbociclib (PD-0332991) For The First-Line Treatment Of Hormone-Receptor Positive Advanced Breast Cancer

NCT00721409
View directory record Official record
Conditions
Breast Cancer
Interventions
PD 0332991, letrozole
Drug
Lead sponsor
Pfizer
Industry
Eligibility
18 Years and older · Female only
Enrollment
177 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2017
U.S. locations
51
States / cities
Alhambra, California • Bakersfield, California • Fullerton, California + 24 more
Source: ClinicalTrials.gov public record
Updated Nov 3, 2019 · Synced Sep 25, 2026, 1:21 AM EDT
Completed Phase 2 Interventional Results available

Pembrolizumab and Doxorubicin Hydrochloride or Anti-Estrogen Therapy in Treating Patients With Triple-Negative or Hormone Receptor-Positive Metastatic Breast Cancer

NCT02648477
View directory record Official record
Conditions
Estrogen Receptor Negative, Estrogen Receptor Positive, HER2/Neu Negative, Progesterone Receptor Negative, Progesterone Receptor Positive, Stage IV Breast Cancer, Triple-Negative Breast Carcinoma
Interventions
Anastrozole, Doxorubicin Hydrochloride, Exemestane, Laboratory Biomarker Analysis, Letrozole, Pembrolizumab
Drug · Other · Biological
Lead sponsor
City of Hope Medical Center
Other
Eligibility
18 Years and older
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2023
U.S. locations
6
States / cities
Corona, California • Duarte, California • Lancaster, California + 3 more
Source: ClinicalTrials.gov public record
Updated Mar 18, 2024 · Synced Sep 25, 2026, 1:21 AM 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 23, 2017 · Synced Sep 25, 2026, 1:21 AM EDT
Active, not recruiting Phase 3 Interventional

A Study Evaluating the Efficacy and Safety of Giredestrant Combined With Palbociclib Compared With Letrozole Combined With Palbociclib in Participants With Estrogen Receptor-Positive, HER2-Negative Locally Advanced or Metastatic Breast Cancer (persevERA Breast Cancer)

NCT04546009
View directory record Official record
Conditions
Estrogen Receptor-Positive, HER2-Negative Locally Advanced or Metastatic Breast Cancer
Interventions
Giredestrant, Giredestrant-matched Placebo, Letrozole, Letrozole-matched Placebo, Palbociclib, LHRH Agonist
Drug
Lead sponsor
Hoffmann-La Roche
Industry
Eligibility
18 Years and older
Enrollment
992 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2027
U.S. locations
37
States / cities
Fountain Valley, California • Long Beach, California • San Leandro, California + 32 more
Source: ClinicalTrials.gov public record
Updated Aug 16, 2026 · Synced Sep 25, 2026, 1:21 AM EDT
Completed Phase 2 Interventional Results available

Bicalutamide in Treating Patients With Metastatic Breast Cancer

NCT00468715
View directory record Official record
Conditions
Breast Cancer
Interventions
bicalutamide, diagnostic laboratory biomarker analysis, immunohistochemistry staining method
Drug · Other
Lead sponsor
Memorial Sloan Kettering Cancer Center
Other
Eligibility
18 Years to 120 Years
Enrollment
28 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2021
U.S. locations
8
States / cities
San Francisco, California • Washington D.C., District of Columbia • Boston, Massachusetts + 4 more
Source: ClinicalTrials.gov public record
Updated Aug 2, 2022 · Synced Sep 25, 2026, 1:21 AM EDT
Completed Phase 2 Interventional Results available

Preoperative Hormone Therapy for Postmenopausal Women With ER+ Clinical Stage T2-4 Tumors

NCT01831076
View directory record Official record
Conditions
Breast Cancer, Stage II Breast Cancer, Stage III Breast Cancer
Interventions
Exemestane, Exemestane and tamoxifen
Drug
Lead sponsor
University of Colorado, Denver
Other
Eligibility
50 Years and older · Female only
Enrollment
36 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2002 – 2022
U.S. locations
1
States / cities
Aurora, Colorado
Source: ClinicalTrials.gov public record
Updated Mar 2, 2022 · Synced Sep 25, 2026, 1:21 AM EDT
Completed Phase 1 Interventional

MK2206 in Combination With Anastrozole, Fulvestrant, or Anastrozole and Fulvestrant in Treating Postmenopausal Women With Metastatic Breast Cancer

NCT01344031
View directory record Official record
Conditions
Estrogen Receptor Positive, Invasive Breast Carcinoma, Recurrent Breast Carcinoma, Stage IV Breast Cancer AJCC v6 and v7
Interventions
Akt Inhibitor MK2206, Anastrozole, Fulvestrant, Laboratory Biomarker Analysis
Drug · Other
Lead sponsor
National Cancer Institute (NCI)
NIH
Eligibility
18 Years and older · Female only
Enrollment
31 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
Started 2011
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Jul 22, 2018 · Synced Sep 25, 2026, 1:21 AM EDT
Completed Phase 2 Interventional Results available

Open-label, Phase II, Study of Everolimus Plus Letrozole in Postmenopausal Women With ER+, HER2- Metastatic or Locally Advanced Breast Cancer

NCT01698918
View directory record Official record
Conditions
Hormone Receptor Positive Breast Cancer
Interventions
Everolimus, Letrozole, Exemestane, Alcohol-free dexamethasone mouth rinse (Stomatitis sub-study), Standard of care to treat stomatitis (Stomatitis sub-study)
Drug
Lead sponsor
Novartis Pharmaceuticals
Industry
Eligibility
18 Years and older · Female only
Enrollment
202 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2021
U.S. locations
15
States / cities
Birmingham, Alabama • Gilbert, Arizona • Loma Linda, California + 12 more
Source: ClinicalTrials.gov public record
Updated May 2, 2023 · Synced Sep 25, 2026, 1:21 AM EDT
Completed Not applicable Interventional Results available

Pilot Study Estradiol Followed by Exemestane Hormone Receptor + Metastatic Breast Cancer

NCT01385280
View directory record Official record
Conditions
Estrogen Receptor-positive Breast Cancer, Progesterone Receptor Positive Tumor, Recurrent Breast Cancer, Stage IIIC Breast Cancer, Stage IV Breast Cancer
Interventions
therapeutic estradiol, exemestane, laboratory biomarker analysis, enzyme-linked immunosorbent assay
Biological · Drug · Other
Lead sponsor
University of Arizona
Other
Eligibility
Female only
Enrollment
13 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2013
U.S. locations
1
States / cities
Tucson, Arizona
Source: ClinicalTrials.gov public record
Updated Oct 16, 2018 · Synced Sep 25, 2026, 1:21 AM EDT
Completed Phase 1 Interventional

Alisertib and Fulvestrant in Treating Patients With Hormone Receptor Positive Breast Cancer That is Metastatic or Locally Advanced and Cannot Be Removed by Surgery

NCT02219789
View directory record Official record
Conditions
Estrogen Receptor Positive, Progesterone Receptor Positive, Recurrent Breast Carcinoma, Stage IIIB Breast Cancer, Stage IIIC Breast Cancer, Stage IV Breast Cancer
Interventions
Alisertib, Fulvestrant, Laboratory Biomarker Analysis
Drug · Other
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years and older · Female only
Enrollment
10 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2018
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Oct 2, 2018 · Synced Sep 25, 2026, 1:21 AM EDT
Terminated Phase 1Phase 2 Interventional Results available

Taselisib and Enzalutamide in Treating Patients With Androgen Receptor Positive Triple-Negative Metastatic Breast Cancer

NCT02457910
View directory record Official record
Conditions
Estrogen Receptor Negative, Estrogen Receptor Positive, HER2/Neu Negative, Progesterone Receptor Negative, Progesterone Receptor Positive, Stage IV Breast Cancer, Triple-Negative Breast Carcinoma
Interventions
Biomarker Analysis, Enzalutamide, Pharmacological Study, Taselisib
Other · Drug
Lead sponsor
Vanderbilt-Ingram Cancer Center
Other
Eligibility
18 Years and older
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2022
U.S. locations
12
States / cities
Birmingham, Alabama • Washington D.C., District of Columbia • Chicago, Illinois + 9 more
Source: ClinicalTrials.gov public record
Updated Aug 21, 2022 · Synced Sep 25, 2026, 1:21 AM EDT
Completed Phase 3 Interventional Results available

Study to Assess the Safety and Efficacy of Ribociclib (LEE011) in Combination With Letrozole for the Treatment of Men and Pre/Postmenopausal Women With HR+ HER2- aBC

NCT02941926
View directory record Official record
Conditions
Breast Cancer
Interventions
Ribociclib, Letrozole, Goserelin, Leuprolide
Drug
Lead sponsor
Novartis Pharmaceuticals
Industry
Eligibility
18 Years and older
Enrollment
3,246 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2022
U.S. locations
71
States / cities
Anchorage, Alaska • Chandler, Arizona • Phoenix, Arizona + 66 more
Source: ClinicalTrials.gov public record
Updated Oct 23, 2023 · Synced Sep 25, 2026, 1:21 AM EDT
Completed Phase 1Phase 2 Interventional Results available

A Pharmacokinetic and Randomized Trial of Neoadjuvant Treatment With Anastrozole Plus AZD0530 in Postmenopausal Patients With Hormone Receptor Positive Breast Cancer

NCT01216176
View directory record Official record
Conditions
Breast Cancer
Interventions
Anastrozole, AZD0530 (saracatinib), Placebo
Drug
Lead sponsor
Joyce Marie Slingerland, MD
Other
Eligibility
18 Years and older · Female only
Enrollment
71 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2018
U.S. locations
2
States / cities
Palo Alto, California • Miami, Florida
Source: ClinicalTrials.gov public record
Updated Jan 7, 2025 · Synced Sep 25, 2026, 1:21 AM EDT
Completed Phase 2 Interventional Results available

Neoadjuvant Endocrine Therapy in Hormone Receptor-Positive, Human Epidermal Growth Factor Receptor 2 (HER2)-Negative Node-Negative Breast Cancer

NCT03219476
View directory record Official record
Conditions
Breast Cancer, Invasive Breast Cancer
Interventions
Anastrozole, Letrozole, Exemestane, Tamoxifen
Drug
Lead sponsor
Medical College of Wisconsin
Other
Eligibility
18 Years and older · Female only
Enrollment
37 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2025
U.S. locations
1
States / cities
Milwaukee, Wisconsin
Source: ClinicalTrials.gov public record
Updated Apr 28, 2025 · Synced Sep 25, 2026, 1:21 AM EDT
Recruiting Phase 2 Interventional

Imlunestrant and Abemaciclib for the Treatment of Estrogen Receptor Positive Breast Cancer in Patients With Minimal Residual Disease, MIRI Trial

NCT07191717
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, Invasive Breast Carcinoma, Localized Estrogen Receptor-Positive Breast Carcinoma, Localized Human Epidermal Growth Factor Receptor (HER2)-Negative Breast Carcinoma
Interventions
Abemaciclib, Biospecimen Collection, Imlunestrant, Questionnaire Administration, Radiologic Imaging Procedure
Drug · Procedure · Other
Lead sponsor
Jonsson Comprehensive Cancer Center
Other
Eligibility
18 Years and older
Enrollment
42 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2031
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Aug 19, 2026 · Synced Sep 25, 2026, 1:21 AM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Conformal Ablative Radiotherapy in Older Women (CARMEN) With Breast Cancer Undergoing Non-Operative Management

NCT07242118
View directory record Official record
Conditions
Breast Cancer Female
Interventions
SABR
Radiation
Lead sponsor
University of Kansas Medical Center
Other
Eligibility
65 Years and older · Female only
Enrollment
18 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2027
U.S. locations
1
States / cities
Kansas City, Kansas
Source: ClinicalTrials.gov public record
Updated Feb 9, 2026 · Synced Sep 25, 2026, 1:21 AM EDT
Completed Phase 1Phase 2 Interventional Results available

A Study of Mirdametinib on Its Own or in Combination With Fulvestrant in People With Solid Tumor Cancer

NCT05054374
View directory record Official record
Conditions
Breast Cancer, Breast Cancer Stage IV, HER2-negative Breast Cancer, Solid Carcinoma, MEK1 Gene Mutation, MEK2 Gene Mutation, Metastatic Breast Cancer
Interventions
Mirdametinib, Fulvestrant
Drug
Lead sponsor
Memorial Sloan Kettering Cancer Center
Other
Eligibility
18 Years and older
Enrollment
6 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2023
U.S. locations
4
States / cities
Middletown, New Jersey • Commack, New York • Harrison, New York + 1 more
Source: ClinicalTrials.gov public record
Updated May 22, 2025 · Synced Sep 25, 2026, 1:21 AM EDT
Completed Phase 1Phase 2 Interventional Results available

Safety Study Of Chemotherapy Combined With Dendritic Cell Vaccine to Treat Breast Cancer

NCT02018458
View directory record Official record
Conditions
Breast Cancer
Interventions
LA TNBC: DC vaccine+Preop chemo, ER+/HER2-BC:DC vaccine+Preop chemo
Biological
Lead sponsor
Baylor Research Institute
Other
Eligibility
18 Years to 80 Years · Female only
Enrollment
10 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2019
U.S. locations
1
States / cities
Dallas, Texas
Source: ClinicalTrials.gov public record
Updated Oct 10, 2021 · Synced Sep 25, 2026, 1:21 AM EDT
Withdrawn Phase 2 Interventional

Fulvestrant + Neratinib In Breast Cancer

NCT04901299
View directory record Official record
Conditions
Stage IV (Metastatic) Breast Cancer, Metastatic Breast Cancer, ER Positive Breast Cancer, PR-Positive Breast Cancer, HER2-negative Breast Cancer, Invasive Breast Cancer
Interventions
NERATINIB, FULVESTRANT
Drug
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
18 Years and older
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2025
U.S. locations
2
States / cities
Boston, Massachusetts • Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Jul 31, 2023 · Synced Sep 25, 2026, 1:21 AM EDT
Active, not recruiting Phase 1 Interventional Results available

A Study of H3B-6545 in Combination With Palbociclib in Women With Advanced or Metastatic Estrogen Receptor-Positive Human Epidermal Growth Factor Receptor-2 (HER2)-Negative Breast Cancer

NCT04288089
View directory record Official record
Conditions
Receptors, Estrogen, Genes, Erbb-2, Breast Neoplasms
Interventions
Palbociclib (75, 100, 125 milligram [mg]), H3B-6545 (150, 300, 450 mg)
Drug
Lead sponsor
Eisai Inc.
Industry
Eligibility
18 Years and older · Female only
Enrollment
31 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2027
U.S. locations
5
States / cities
Sarasota, Florida • Boston, Massachusetts • Kansas City, Missouri + 2 more
Source: ClinicalTrials.gov public record
Updated Aug 26, 2026 · Synced Sep 25, 2026, 1:21 AM EDT
Completed Phase 2 Interventional Results available

Study of 2 Ribociclib Doses in Combination With Aromatase Inhibitors in Women With HR+, HER2- Advanced Breast Cancer

NCT03822468
View directory record Official record
Conditions
Breast Cancer
Interventions
Ribociclib, Anastrozole, Letrozole, Goserelin
Drug
Lead sponsor
Novartis Pharmaceuticals
Industry
Eligibility
18 Years to 100 Years · Female only
Enrollment
376 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2024
U.S. locations
14
States / cities
Mobile, Alabama • Greenbrae, California • Longmont, Colorado + 11 more
Source: ClinicalTrials.gov public record
Updated Oct 15, 2025 · Synced Sep 25, 2026, 1:21 AM EDT
Completed Phase 2 Interventional Results available

A Phase II Randomized Study Evaluating the Biological and Clinical Effects of the Combination of Palbociclib With Letrozole as Neoadjuvant Therapy in Post-Menopausal Women With Estrogen-Receptor Positive Primary Breast Cancer

NCT02296801
View directory record Official record
Conditions
Breast Cancer, Breast Carcinoma, Breast Tumors
Interventions
Letrozole, palbociclib
Drug
Lead sponsor
NSABP Foundation Inc
Network
Eligibility
18 Years and older · Female only
Enrollment
307 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2019
U.S. locations
19
States / cities
Long Beach, California • Miami, Florida • Decatur, Illinois + 13 more
Source: ClinicalTrials.gov public record
Updated Jan 12, 2022 · Synced Sep 25, 2026, 1:21 AM EDT
Terminated Not applicable Interventional Results available

Preoperative Stereotactic Ablative Body Radiotherapy (SABR) for Early-Stage Breast Cancer

NCT03137693
View directory record Official record
Conditions
Breast Cancer, Breast Cancer Female, Breast Adenocarcinoma
Interventions
Standard of Care Schedule Variation: SABR, Breast-conserving Surgery
Other · Procedure
Lead sponsor
H. Lee Moffitt Cancer Center and Research Institute
Other
Eligibility
50 Years and older · Female only
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2020
U.S. locations
1
States / cities
Tampa, Florida
Source: ClinicalTrials.gov public record
Updated Feb 22, 2023 · Synced Sep 25, 2026, 1:21 AM EDT
Active, not recruiting Phase 1 Interventional

Study of AC699 in Patients With Estrogen Receptor Positive/Human Epidermal Growth Factor Receptor 2 Negative (ER+/HER2-) Locally Advanced or Metastatic Breast Cancer

NCT05654532
View directory record Official record
Conditions
Breast Cancer
Interventions
AC699
Drug
Lead sponsor
Accutar Biotechnology Inc
Industry
Eligibility
18 Years and older
Enrollment
100 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2026
U.S. locations
9
States / cities
Denver, Colorado • Orlando, Florida • Sarasota, Florida + 6 more
Source: ClinicalTrials.gov public record
Updated Sep 29, 2025 · Synced Sep 25, 2026, 1:21 AM EDT