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ClinicalTrials.gov public records Last synced Oct 2, 2026, 5:20 AM EDT

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Showing 49–72 of 392 matching trials from the live ClinicalTrials.gov search.
Filters: Condition: Estrogen Receptor Positive Breast Cancer Clear all
Active, not recruiting No phase listed Observational

Genetic Analysis in Blood and Tumor Samples From Patients With Advanced or Metastatic Estrogen Receptor Positive and HER2 Negative Breast Cancer Receiving Palbociclib and Endocrine Therapy

NCT03281902
View directory record Official record
Conditions
Advanced Breast Carcinoma, Locally Advanced Breast Carcinoma, Metastatic Breast Carcinoma, Recurrent Breast Carcinoma, Stage III Breast Cancer AJCC v7, Stage IIIA Breast Cancer AJCC v7, Stage IIIB Breast Cancer AJCC v7, Stage IIIC Breast Cancer AJCC v7, Stage IV Breast Cancer AJCC v6 and v7
Interventions
Biopsy, Biospecimen Collection, Laboratory Biomarker Analysis
Procedure · Other
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years and older · Female only
Enrollment
68 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2028
U.S. locations
3
States / cities
Scottsdale, Arizona • Jacksonville, Florida • Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Jun 9, 2026 · Synced Oct 2, 2026, 5:20 AM EDT
Completed No phase listed Observational

Pharmacogenetics of Anastrozole in Postmenopausal Women With Estrogen Receptor-Positive and/or Progesterone Receptor-Positive Stage I, Stage II, or Stage III Breast Cancer

NCT00283608
View directory record Official record
Conditions
Breast Cancer
Interventions
Single nucleotide polymorphism (SNP), high performance liquid chromatography, measurements by DXA, questionnaire administration
Genetic · Other
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years and older · Female only
Enrollment
1,000 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2010
U.S. locations
4
States / cities
Scottsdale, Arizona • Jacksonville, Florida • Rochester, Minnesota + 1 more
Source: ClinicalTrials.gov public record
Updated May 16, 2011 · Synced Oct 2, 2026, 5:20 AM EDT
Terminated Phase 1Phase 2 Interventional Results available

Phase 1/2 Study of Amcenestrant (SAR439859) Single Agent and in Combination With Other Anti-cancer Therapies in Postmenopausal Women With Estrogen Receptor Positive Advanced Breast Cancer

NCT03284957
View directory record Official record
Conditions
Breast Cancer
Interventions
Amcenestrant, Palbociclib, Alpelisib, Everolimus, Abemaciclib
Drug
Lead sponsor
Sanofi
Industry
Eligibility
18 Years and older · Female only
Enrollment
136 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2024
U.S. locations
4
States / cities
Aurora, Colorado • Boston, Massachusetts • New York, New York + 1 more
Source: ClinicalTrials.gov public record
Updated Nov 24, 2025 · Synced Oct 2, 2026, 5:20 AM EDT
Recruiting Phase 1 Interventional

A Study of BTX-A51 in People With Advanced Solid Tumor and Breast Cancer

NCT04872166
View directory record Official record
Conditions
Advanced Solid Tumor, Metastatic Breast Cancer
Interventions
BTX-A51
Drug
Lead sponsor
Edgewood Oncology Inc.
Industry
Eligibility
18 Years and older
Enrollment
112 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2027
U.S. locations
6
States / cities
Lake Mary, Florida • Sarasota, Florida • Cincinnati, Ohio + 2 more
Source: ClinicalTrials.gov public record
Updated Jan 30, 2025 · Synced Oct 2, 2026, 5:20 AM EDT
Active, not recruiting Phase 1 Interventional

Study of AZD9833 Alone or in Combination in Women With Advanced Breast Cancer.

NCT03616587
View directory record Official record
Conditions
ER+ HER2- Advanced Breast Cancer
Interventions
AZD9833, AZD9833 with palbociclib, AZD9833 with everolimus, AZD9833 with abemaciclib, AZD9833 with capivasertib, AZD9833 with ribociclib, AZD9833 with anastrozole
Drug
Lead sponsor
AstraZeneca
Industry
Eligibility
18 Years to 130 Years · Female only
Enrollment
396 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2027
U.S. locations
5
States / cities
Aurora, Colorado • Sarasota, Florida • Philadelphia, Pennsylvania + 2 more
Source: ClinicalTrials.gov public record
Updated Aug 18, 2026 · Synced Oct 2, 2026, 5:20 AM EDT
Terminated Phase 2 Interventional Results available

Phase II of Naltrexone in Hormone-Refractory Metastatic Breast Cancer

NCT00379197
View directory record Official record
Conditions
Breast Cancer
Interventions
naltrexone, PET scan
Drug · Procedure
Lead sponsor
Masonic Cancer Center, University of Minnesota
Other
Eligibility
18 Years and older · Female only
Enrollment
13 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2013
U.S. locations
1
States / cities
Minneapolis, Minnesota
Source: ClinicalTrials.gov public record
Updated Dec 28, 2017 · Synced Oct 2, 2026, 5:20 AM EDT
Completed Phase 2 Interventional Results available

Lapatinib and Bevacizumab for Metastatic Breast Cancer

NCT00444535
View directory record Official record
Conditions
Neoplasms, Breast
Interventions
lapatinib, bevacizumab
Drug
Lead sponsor
Novartis Pharmaceuticals
Industry
Eligibility
18 Years and older · Female only
Enrollment
52 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2020
U.S. locations
9
States / cities
Tucson, Arizona • San Francisco, California • Hollywood, Florida + 6 more
Source: ClinicalTrials.gov public record
Updated Oct 25, 2021 · Synced Oct 2, 2026, 5:20 AM EDT
Completed Phase 3 Interventional Results available

A Phase III Randomized Trial of Metformin vs Placebo in Early Stage Breast Cancer

NCT01101438
View directory record Official record
Conditions
Breast Cancer
Interventions
metformin hydrochloride, placebo
Drug · Other
Lead sponsor
Canadian Cancer Trials Group
Network
Eligibility
18 Years to 74 Years
Enrollment
3,649 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2023
U.S. locations
280
States / cities
Anchorage, Alaska • Fairbanks, Alaska • Scottsdale, Arizona + 213 more
Source: ClinicalTrials.gov public record
Updated Sep 13, 2023 · Synced Oct 2, 2026, 5:20 AM EDT
Terminated Phase 1Phase 2 Interventional Results available

GS-5829 in Combination With Fulvestrant or Exemestane in Women With Advanced Estrogen Receptor Positive, HER2 Negative-Breast Cancer

NCT02983604
View directory record Official record
Conditions
Advanced Estrogen Receptor Positive HER2- Breast Cancer
Interventions
GS-5829, Exemestane, Fulvestrant
Drug
Lead sponsor
Gilead Sciences
Industry
Eligibility
18 Years and older · Female only
Enrollment
14 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2018
U.S. locations
6
States / cities
Stanford, California • Boston, Massachusetts • Minneapolis, Minnesota + 3 more
Source: ClinicalTrials.gov public record
Updated Aug 7, 2019 · Synced Oct 2, 2026, 5:20 AM EDT
Completed Phase 1 Interventional

Study of AZD2014 and Palbociclib in Patients With Estrogen Receptor Positive (ER+) Metastatic Breast Cancer

NCT02599714
View directory record Official record
Conditions
Advanced and Metastatic Breast Cancer
Interventions
AZD2014, Palbociclib, Fulvestrant
Drug
Lead sponsor
AstraZeneca
Industry
Eligibility
18 Years to 130 Years · Female only
Enrollment
54 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2023
U.S. locations
5
States / cities
Encinitas, California • Sarasota, Florida • Detroit, Michigan + 2 more
Source: ClinicalTrials.gov public record
Updated Jun 6, 2024 · Synced Oct 2, 2026, 5:20 AM EDT
Completed Phase 3 Interventional Results available

Everolimus in Combination With Exemestane in the Treatment of Postmenopausal Women With Estrogen Receptor Positive Locally Advanced or Metastatic Breast Cancer Who Are Refractory to Letrozole or Anastrozole

NCT00863655
View directory record Official record
Conditions
Breast Cancer
Interventions
Everolimus, Exemestane, Everolimus Placebo
Drug
Lead sponsor
Novartis Pharmaceuticals
Industry
Eligibility
18 Years and older · Female only
Enrollment
724 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2014
U.S. locations
63
States / cities
Chandler, Arizona • Fayetteville, Arkansas • Anaheim, California + 54 more
Source: ClinicalTrials.gov public record
Updated May 2, 2017 · Synced Oct 2, 2026, 5:20 AM EDT
Terminated Phase 1Phase 2 Interventional Results available

Neoadjuvant Hormonal Therapy Combined With Chemoimmunotherapy

NCT02345772
View directory record Official record
Conditions
HER2-positive Breast Cancer, ER-positive Breast Cancer
Interventions
fulvestrant 500 mg, Docetaxel, Trastuzumab (H, 8mg/kg, Pertuzumab (P, 840 mg
Drug
Lead sponsor
Western Regional Medical Center
Other
Eligibility
18 Years and older
Enrollment
4 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2015
U.S. locations
1
States / cities
Goodyear, Arizona
Source: ClinicalTrials.gov public record
Updated Feb 20, 2018 · Synced Oct 2, 2026, 5:20 AM 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, 5:20 AM EDT
Active, not recruiting Not applicable Interventional

Hypofractionated Regional Nodal Irradiation Clinical Trial for Women With Breast Cancer

NCT02515110
View directory record Official record
Conditions
Breast Cancer, Node-positive Breast Cancer, Breast Adenocarcinoma, Invasive Breast Carcinoma, Lobular Breast Carcinoma In Situ
Interventions
External Beam Radiation Therapy
Radiation
Lead sponsor
Virginia Commonwealth University
Other
Eligibility
40 Years and older · Female only
Enrollment
137 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2028
U.S. locations
2
States / cities
Richmond, Virginia • South Hill, Virginia
Source: ClinicalTrials.gov public record
Updated Jun 15, 2026 · Synced Oct 2, 2026, 5:20 AM EDT
Terminated Phase 3 Interventional Results available

Continued HER2 Suppression With Lapatinib Plus Trastuzumab Versus Trastuzumab Alone

NCT00968968
View directory record Official record
Conditions
Cancer
Interventions
Lapatinib, Trastuzumab
Drug · Biological
Lead sponsor
Novartis Pharmaceuticals
Industry
Eligibility
18 Years and older · Female only
Enrollment
37 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2018
U.S. locations
112
States / cities
Chandler, Arizona • Flagstaff, Arizona • Gilbert, Arizona + 93 more
Source: ClinicalTrials.gov public record
Updated Jun 10, 2019 · Synced Oct 2, 2026, 5:20 AM EDT
Completed Phase 1Phase 2 Interventional Results available

Palbociclib With Everolimus + Exemestane In BC

NCT02871791
View directory record Official record
Conditions
Human Epidermal Growth Factor 2 Negative Carcinoma of Breast, Hormone Receptor (HR)-Positive Breast Cancer
Interventions
Palbociclib, Everolimus, Exemestane
Drug
Lead sponsor
Dana-Farber Cancer Institute
Other
Eligibility
18 Years and older
Enrollment
41 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2021
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Aug 29, 2022 · Synced Oct 2, 2026, 5:20 AM EDT
Terminated Phase 2 Interventional

High-Dose Esterified Estrogens in Treating Postmenopausal Women With Metastatic Breast Cancer That Has Failed Previous Hormone Therapy

NCT00131924
View directory record Official record
Conditions
Breast Cancer
Interventions
esterified estrogens
Biological
Lead sponsor
Northwestern University
Other
Eligibility
18 Years and older · Female only
Enrollment
1 participant
Healthy volunteers
Healthy volunteers not accepted
Timeline
2004 – 2006
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Jun 11, 2012 · Synced Oct 2, 2026, 5:20 AM EDT
Completed Phase 3 Interventional Results available

Paclitaxel, Nab-paclitaxel, or Ixabepilone With or Without Bevacizumab in Treating Patients With Stage IIIC or Stage IV Breast Cancer

NCT00785291
View directory record Official record
Conditions
Estrogen Receptor Negative, Estrogen Receptor Positive, HER2/Neu Negative, HER2/Neu Positive, Progesterone Receptor Negative, Progesterone Receptor Positive, Recurrent Breast Carcinoma, Stage IIIC Breast Cancer AJCC v6, Stage IV Breast Cancer AJCC v6 and v7
Interventions
Bevacizumab, Ixabepilone, Laboratory Biomarker Analysis, Nab-paclitaxel, Paclitaxel, Questionnaire Administration
Biological · Drug · Other
Lead sponsor
National Cancer Institute (NCI)
NIH
Eligibility
18 Years and older
Enrollment
799 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2017
U.S. locations
703
States / cities
Scottsdale, Arizona • Fort Smith, Arkansas • Jonesboro, Arkansas + 472 more
Source: ClinicalTrials.gov public record
Updated Jun 23, 2026 · Synced Oct 2, 2026, 5:20 AM EDT
Completed Phase 2 Interventional Results available

A Study of Abiraterone Acetate Plus Prednisone With or Without Exemestane in Postmenopausal Women With Estrogen Receptor-Positive (ER+) Metastatic Breast Cancer Progressing After Letrozole or Anastrozole Therapy

NCT01381874
View directory record Official record
Conditions
Metastatic ER+ Her2- Breast Cancer, Postmenopausal
Interventions
Exemestane, Abiraterone acetate + Prednisone/ Prednisolone + Exemestane, Abiraterone acetate + Prednisone or Prednisolone
Drug
Lead sponsor
Janssen Research & Development, LLC
Industry
Eligibility
18 Years and older · Female only
Enrollment
297 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2018
U.S. locations
24
States / cities
Muscle Shoals, Alabama • Fresno, California • Los Angeles, California + 21 more
Source: ClinicalTrials.gov public record
Updated Apr 11, 2019 · Synced Oct 2, 2026, 5:20 AM EDT
Recruiting Phase 2 Interventional

Study to Evaluate the Safety and Tolerability of Camizestrant in Combination With Atirmociclib in Women With Advanced Breast Cancer

NCT07427394
View directory record Official record
Conditions
Advanced Breast Cancer
Interventions
Camizestrant, Atirmociclib
Drug
Lead sponsor
AstraZeneca
Industry
Eligibility
18 Years and older · Female only
Enrollment
24 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2027
U.S. locations
3
States / cities
St Louis, Missouri • East Providence, Rhode Island • Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Sep 29, 2026 · Synced Oct 2, 2026, 5:20 AM EDT
Completed No phase listed Observational

Estrogen Receptor-Positive Breast Cancer Patient-Derived Xenografts

NCT02752893
View directory record Official record
Conditions
Breast Cancer
Interventions
Not listed
Lead sponsor
Dartmouth-Hitchcock Medical Center
Other
Eligibility
18 Years and older
Enrollment
10 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2019
U.S. locations
1
States / cities
Lebanon, New Hampshire
Source: ClinicalTrials.gov public record
Updated Jun 1, 2020 · Synced Oct 2, 2026, 5:20 AM EDT
Terminated Phase 2 Interventional Results available

A Phase II Study Comparing The Efficacy Of Venetoclax + Fulvestrant Vs. Fulvestrant In Women With Estrogen Receptor-Positive, Her2-Negative Locally Advanced Or Metastatic Breast Cancer Who Experienced Disease Recurrence Or Progression During Or After CDK4/6 Inhibitor Therapy

NCT03584009
View directory record Official record
Conditions
Estrogen Receptor-positive (ER+)/Human Epidermal Growth Factor Receptor (HER2)-Negative Locally Advanced or Metastatic Breast Cancer
Interventions
Venetoclax, Fulvestrant
Drug
Lead sponsor
Hoffmann-La Roche
Industry
Eligibility
18 Years and older · Female only
Enrollment
103 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2021
U.S. locations
21
States / cities
Phoenix, Arizona • Springdale, Arkansas • La Jolla, California + 18 more
Source: ClinicalTrials.gov public record
Updated Jun 28, 2022 · Synced Oct 2, 2026, 5:20 AM EDT
Recruiting Phase 2 Interventional

Turkey Tail Mushroom for Treating Post-Menopausal Women With HER2-Negative ER-Positive Breast Cancer Undergoing Surgery

NCT06450873
View directory record Official record
Conditions
Estrogen Receptor-Positive Breast Carcinoma, HER2-Negative Breast Carcinoma
Interventions
Coriolus Versicolor Extract, Questionnaire Administration
Drug · Other
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years and older · Female only
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2028
U.S. locations
1
States / cities
Scottsdale, Arizona
Source: ClinicalTrials.gov public record
Updated Mar 31, 2026 · Synced Oct 2, 2026, 5:20 AM EDT
Completed Not applicable Interventional Results available

FLT PET in Measuring Treatment Response in Patients With Newly Diagnosed Estrogen Receptor-Positive, HER2-Negative Stage I-III Breast Cancer

NCT01928186
View directory record Official record
Conditions
Estrogen Receptor Positive, HER2/Neu Negative, Male Breast Carcinoma, Stage IA Breast Cancer, Stage IB Breast Cancer, Stage IIA Breast Cancer, Stage IIB Breast Cancer, Stage IIIA Breast Cancer, Stage IIIB Breast Cancer, Stage IIIC Breast Cancer
Interventions
Fluorothymidine F-18, Positron Emission Tomography, Laboratory Biomarker Analysis, Run-in (short pre-surgery course) of endocrine-targeted therapy
Drug · Procedure · Other
Lead sponsor
University of Washington
Other
Eligibility
18 Years and older
Enrollment
28 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2015
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated May 15, 2018 · Synced Oct 2, 2026, 5:20 AM EDT