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ClinicalTrials.gov public records Last synced May 21, 2026, 5:33 PM EDT

Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.

Showing 1–24 of 397 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Estrogen Receptor Positive Clear all
Terminated Phase 1 Interventional
View directory record Official record
Conditions
Estrogen Receptor Positive, HER2/Neu Negative, Male Breast Carcinoma, Recurrent Breast Carcinoma, Stage IIIB Breast Cancer, Stage IIIC Breast Cancer, Stage IV Breast Cancer
Interventions
Exemestane, Gamma-Secretase Inhibitor RO4929097, Goserelin Acetate
Drug
Lead sponsor
National Cancer Institute (NCI)
NIH
Eligibility
18 Years and older
Enrollment
15 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2013
U.S. locations
4
States / cities
Tampa, Florida • Atlanta, Georgia • Chapel Hill, North Carolina + 1 more
Source: ClinicalTrials.gov public record
Updated May 24, 2015 · Synced May 21, 2026, 5:33 PM EDT
Recruiting Phase 1 Interventional
View directory record Official record
Conditions
Advanced Breast Cancer, Metastatic Breast Cancer (HR+/ HER2-), Colorectal Cancer, Metastatic Colorectal Adenocarcinoma, Triple Negative Breast Cancer
Interventions
PF-08032562, Fulvestrant, Cetuximab, Fluorouracil, Oxaliplatin, Leucovorin, Bevacizumab
Drug
Lead sponsor
Pfizer
Industry
Eligibility
18 Years and older
Enrollment
260 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2030
U.S. locations
9
States / cities
Duarte, California • Grand Rapids, Michigan • Conroe, Texas + 5 more
Source: ClinicalTrials.gov public record
Updated May 7, 2026 · Synced May 21, 2026, 5:33 PM EDT
Completed No phase listed Observational
View directory record Official record
Conditions
Breast Carcinoma
Interventions
quality-of-life assessment, Questionnaire Administration
Other
Lead sponsor
Alliance for Clinical Trials in Oncology
Other
Eligibility
18 Years and older · Female only
Enrollment
307 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2016
U.S. locations
227
States / cities
Mobile, Alabama • Fort Smith, Arkansas • Fresno, California + 154 more
Source: ClinicalTrials.gov public record
Updated Aug 17, 2017 · Synced May 21, 2026, 5:33 PM EDT
Active, not recruiting Phase 2 Interventional
View directory record Official record
Conditions
Estrogen Receptor Positive, HER2/Neu Negative, Invasive Breast Carcinoma, Progesterone Receptor Positive
Interventions
Radiation Therapy, Therapeutic Conventional Surgery
Radiation · Procedure
Lead sponsor
M.D. Anderson Cancer Center
Other
Eligibility
18 Years and older
Enrollment
25 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2027
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Mar 4, 2026 · Synced May 21, 2026, 5:33 PM EDT
Withdrawn Phase 2 Interventional
View directory record Official record
Conditions
Ductal Breast Carcinoma in Situ, Estrogen Receptor-negative Breast Cancer, Estrogen Receptor-positive Breast Cancer, HER2-negative Breast Cancer, HER2-positive Breast Cancer, Invasive Ductal Breast Carcinoma, Invasive Lobular Breast Carcinoma, Male Breast Cancer, Medullary Ductal Breast Carcinoma With Lymphocytic Infiltrate, Mucinous Ductal Breast Carcinoma, Papillary Ductal Breast Carcinoma, Progesterone Receptor-negative Breast Cancer, Progesterone Receptor-positive Breast Cancer, Stage I Breast Cancer, Stage II Breast Cancer, Tubular Ductal Breast Carcinoma
Interventions
external beam radiation therapy, questionnaire administration, therapeutic conventional surgery
Radiation · Other · Procedure
Lead sponsor
Case Comprehensive Cancer Center
Other
Eligibility
18 Years and older
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2011
U.S. locations
3
States / cities
Cleveland, Ohio • Orange, Ohio • Westlake, Ohio
Source: ClinicalTrials.gov public record
Updated Dec 7, 2011 · Synced May 21, 2026, 5:33 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers
View directory record Official record
Conditions
Anatomic Stage IA Breast Cancer AJCC v8, Anatomic Stage IB Breast Cancer AJCC v8, Anatomic Stage II Breast Cancer AJCC v8, Anatomic Stage IIA Breast Cancer AJCC v8, Anatomic Stage IIB Breast Cancer AJCC v8, Anatomic Stage III Breast Cancer AJCC v8, Anatomic Stage IIIA Breast Cancer AJCC v8, Anatomic Stage IIIB Breast Cancer AJCC v8, Anatomic Stage IIIC Breast Cancer AJCC v8, Anatomic Stage IV Breast Cancer AJCC v8, Estrogen Receptor Negative, Healthy Subject, HER2 Positive Breast Carcinoma, HER2/Neu Negative, Luminal A Breast Carcinoma, Luminal B Breast Carcinoma, Progesterone Receptor Negative, Prognostic Stage I Breast Cancer AJCC v8, Prognostic Stage IA Breast Cancer AJCC v8, Prognostic Stage IB Breast Cancer AJCC v8, Prognostic Stage II Breast Cancer AJCC v8, Prognostic Stage IIB Breast Cancer AJCC v8, Prognostic Stage III Breast Cancer AJCC v8, Prognostic Stage IIIA Breast Cancer AJCC v8, Prognostic Stage IIIB Breast Cancer AJCC v8, Prognostic Stage IIIC Breast Cancer AJCC v8, Prognostic Stage IV Breast Cancer AJCC v8, Triple-Negative Breast Carcinoma
Interventions
Aspiration of Breast, Biospecimen Collection
Procedure
Lead sponsor
Ohio State University Comprehensive Cancer Center
Other
Eligibility
40 Years and older · Female only
Enrollment
2 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2024
U.S. locations
1
States / cities
Columbus, Ohio
Source: ClinicalTrials.gov public record
Updated Feb 24, 2025 · Synced May 21, 2026, 5:33 PM EDT
Terminated Phase 2 Interventional Results available
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 27, 2022 · Synced May 21, 2026, 5:33 PM EDT
Active, not recruiting Phase 3 Interventional Results available
View directory record Official record
Conditions
Breast Cancer
Interventions
Fulvestrant
Drug
Lead sponsor
AstraZeneca
Industry
Eligibility
45 Years to 130 Years · Female only
Enrollment
736 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2026
U.S. locations
14
States / cities
Casa Grande, Arizona • Fountain Valley, California • New Britain, Connecticut + 11 more
Source: ClinicalTrials.gov public record
Updated Mar 17, 2026 · Synced May 21, 2026, 5:33 PM EDT
Completed Phase 1 Interventional
View directory record Official record
Conditions
Breast Cancer
Interventions
ZN-c5
Drug
Lead sponsor
Zeno Alpha Inc.
Industry
Eligibility
18 Years and older
Enrollment
35 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2021
U.S. locations
5
States / cities
Tucson, Arizona • New York, New York • Nashville, Tennessee + 2 more
Source: ClinicalTrials.gov public record
Updated Jul 31, 2022 · Synced May 21, 2026, 5:33 PM EDT
Terminated Phase 2 Interventional Results available
View directory record Official record
Conditions
Estrogen Receptor-positive Breast Cancer, Human Epidermal Growth Factor 2 Negative Carcinoma of Breast, Male Breast Cancer, Recurrent Breast Cancer, Stage II Breast Cancer, Stage IIIA Breast Cancer, Stage IIIB Breast Cancer
Interventions
anastrozole, pazopanib hydrochloride, therapeutic conventional surgery
Drug · Procedure
Lead sponsor
University of Arizona
Other
Eligibility
18 Years and older
Enrollment
2 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2012
U.S. locations
1
States / cities
Tucson, Arizona
Source: ClinicalTrials.gov public record
Updated Jul 25, 2018 · Synced May 21, 2026, 5:33 PM EDT
Completed Phase 2 Interventional Results available
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 28, 2025 · Synced May 21, 2026, 5:33 PM EDT
Terminated Phase 3 Interventional Results available
View directory record Official record
Conditions
Breast Cancer
Interventions
Taselisib, Placebo, Fulvestrant
Drug
Lead sponsor
Hoffmann-La Roche
Industry
Eligibility
18 Years and older · Female only
Enrollment
631 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2021
U.S. locations
16
States / cities
Tucson, Arizona • Atlanta, Georgia • Marietta, Georgia + 12 more
Source: ClinicalTrials.gov public record
Updated Jul 11, 2022 · Synced May 21, 2026, 5:33 PM EDT
Active, not recruiting Phase 3 Interventional
View directory record Official record
Conditions
Breast Cancer
Interventions
PF-07220060, letrozole, abemaciclib, palbociclib, ribociclib
Drug
Lead sponsor
Pfizer
Industry
Eligibility
18 Years and older
Enrollment
1,035 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2037
U.S. locations
218
States / cities
Birmingham, Alabama • Chandler, Arizona • Gilbert, Arizona + 135 more
Source: ClinicalTrials.gov public record
Updated May 18, 2026 · Synced May 21, 2026, 5:33 PM EDT
Completed Phase 2 Interventional Results available
View directory record Official record
Conditions
Metastatic Breast Carcinoma, Stage IIIB Breast Cancer AJCC v7, Stage IIIC Breast Cancer AJCC v7, Stage IV Breast Cancer AJCC v6 and v7
Interventions
Bortezomib, Fulvestrant, Laboratory Biomarker Analysis
Drug · Other
Lead sponsor
National Cancer Institute (NCI)
NIH
Eligibility
18 Years and older · Female only
Enrollment
118 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2021
U.S. locations
21
States / cities
Farmington, Connecticut • New Haven, Connecticut • Weston, Florida + 8 more
Source: ClinicalTrials.gov public record
Updated Nov 26, 2023 · Synced May 21, 2026, 5:33 PM EDT
Completed Phase 2 Interventional Results available
View directory record Official record
Conditions
Breast Cancer, Stage IV Breast Cancer
Interventions
tamoxifen
Drug
Lead sponsor
ECOG-ACRIN Cancer Research Group
Network
Eligibility
18 Years and older
Enrollment
124 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2022
U.S. locations
292
States / cities
Birmingham, Alabama • Mobile, Alabama • Fort Smith, Arkansas + 203 more
Source: ClinicalTrials.gov public record
Updated Jun 28, 2023 · Synced May 21, 2026, 5:33 PM EDT
Active, not recruiting Phase 1 Interventional
View directory record Official record
Conditions
Breast Cancer
Interventions
ESR1 peptide vaccine
Biological
Lead sponsor
Herbert Lyerly
Other
Eligibility
18 Years and older
Enrollment
8 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2027
U.S. locations
1
States / cities
Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated Feb 26, 2026 · Synced May 21, 2026, 5:33 PM EDT
Terminated Phase 1Phase 2 Interventional Results available
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 19, 2018 · Synced May 21, 2026, 5:33 PM EDT
Completed Phase 3 Interventional Results available
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 6, 2017 · Synced May 21, 2026, 5:33 PM EDT
Completed Phase 2 Interventional Results available
View directory record Official record
Conditions
Malignant Neoplasm of Female Breast
Interventions
Epirubicin, Cyclophosphamide, Docetaxel, Capecitabine, Radiation Therapy
Drug · Radiation
Lead sponsor
University of Colorado, Denver
Other
Eligibility
18 Years and older · Female only
Enrollment
72 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2003 – 2010
U.S. locations
1
States / cities
Aurora, Colorado
Source: ClinicalTrials.gov public record
Updated Sep 23, 2019 · Synced May 21, 2026, 5:33 PM EDT
Completed Phase 1 Interventional
View directory record Official record
Conditions
Breast Cancer
Interventions
Gedatolisib, Palbociclib, Letrozole, Fulvestrant
Drug
Lead sponsor
Celcuity Inc
Industry
Eligibility
18 Years and older · Female only
Enrollment
141 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2022
U.S. locations
41
States / cities
Birmingham, Alabama • Corona, California • Fountain Valley, California + 17 more
Source: ClinicalTrials.gov public record
Updated Jul 26, 2022 · Synced May 21, 2026, 5:33 PM EDT
Terminated Phase 2 Interventional Results available
View directory record Official record
Conditions
ER-positive Breast Cancer, HER2-negative Breast Cancer, Metastatic Cancer
Interventions
Onapristone, Fulvestrant
Drug
Lead sponsor
University of Wisconsin, Madison
Other
Eligibility
18 Years and older
Enrollment
11 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2023
U.S. locations
2
States / cities
Madison, Wisconsin • Milwaukee, Wisconsin
Source: ClinicalTrials.gov public record
Updated May 2, 2024 · Synced May 21, 2026, 5:33 PM EDT
Completed Phase 2 Interventional Results available
View directory record Official record
Conditions
Breast Cancer
Interventions
letrozole, MRI, conventional surgery
Drug · Procedure
Lead sponsor
Alliance for Clinical Trials in Oncology
Other
Eligibility
18 Years and older · Female only
Enrollment
108 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2018
U.S. locations
32
States / cities
Los Angeles, California • Oakland, California • San Francisco, California + 22 more
Source: ClinicalTrials.gov public record
Updated Mar 26, 2018 · Synced May 21, 2026, 5:33 PM EDT
Terminated Phase 3 Interventional Results available
View directory record Official record
Conditions
Breast Cancer
Interventions
Fulvestrant, Anastrozole, Everolimus, Placebo - Anastrozole, Placebo - Everolimus
Drug
Lead sponsor
SWOG Cancer Research Network
Network
Eligibility
18 Years and older · Female only
Enrollment
37 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2019
U.S. locations
223
States / cities
Anchorage, Alaska • Scottsdale, Arizona • Tucson, Arizona + 150 more
Source: ClinicalTrials.gov public record
Updated Jan 27, 2021 · Synced May 21, 2026, 5:33 PM EDT
Active, not recruiting Phase 2 Interventional Results available
View directory record Official record
Conditions
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
Endoxifen Hydrochloride, Laboratory Biomarker Analysis, Pharmacological Study, Tamoxifen Citrate
Drug · Other
Lead sponsor
National Cancer Institute (NCI)
NIH
Eligibility
18 Years and older · Female only
Enrollment
81 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2027
U.S. locations
561
States / cities
Mobile, Alabama • Anchorage, Alaska • Fairbanks, Alaska + 357 more
Source: ClinicalTrials.gov public record
Updated Apr 30, 2026 · Synced May 21, 2026, 5:33 PM EDT