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Showing 25–48 of 24 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Recurrent Hormone Receptor-Positive Breast Carcinoma Clear all
Terminated Phase 3 Interventional

The CAT Study: Atamestane Plus Toremifene Versus Letrozole in Advanced Breast Cancer

NCT00097344
View directory record Official record
Conditions
Breast Neoplasms, Neoplasms, Hormone-Dependent
Interventions
Atamestane, Toremifene, Letrozole, Aromatase inhibition, Estrogen receptor blocker, Hormone therapy, Endocrine therapy, Antiestrogen therapy
Drug · Procedure
Lead sponsor
Intarcia Therapeutics
Industry
Eligibility
18 Years and older · Female only
Enrollment
842 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2004 – 2006
U.S. locations
49
States / cities
Mobile, Alabama • Tuscon, Arizona • Hot Springs, Arkansas + 46 more
Source: ClinicalTrials.gov public record
Updated Aug 22, 2007 · Synced Jun 25, 2026, 5:35 AM EDT
Recruiting Phase 3 Interventional

A Study to Learn About the Study Medicine Called PF-07248144 in Combination With Fulvestrant in People With HR-positive, HER2-negative Advanced or Metastatic Breast Cancer Who Progressed After a Prior Line of Treatment.

NCT07062965
View directory record Official record
Conditions
Breast Cancer
Interventions
PF-07248144, Fulvestrant, Everolimus, Exemestane
Drug
Lead sponsor
Pfizer
Industry
Eligibility
18 Years and older
Enrollment
400 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2030
U.S. locations
102
States / cities
Chandler, Arizona • Gilbert, Arizona • Glendale, Arizona + 85 more
Source: ClinicalTrials.gov public record
Updated May 5, 2026 · Synced Jun 25, 2026, 5:35 AM EDT
Completed Phase 2 Interventional Results available

Randomized Phase II Trial of Letrozole With or Without Dasatinib as First and Second-line Treatment for Hormone Receptor-positive, HER2-negative Post-menopausal Breast Cancer That is Unresectable, Locally Recurrent or Metastatic

NCT00696072
View directory record Official record
Conditions
Metastatic Breast Cancer
Interventions
Dasatinib, Letrozole
Drug
Lead sponsor
Bristol-Myers Squibb
Industry
Eligibility
18 Years and older · Female only
Enrollment
120 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2014
U.S. locations
27
States / cities
Sedona, Arizona • Tucson, Arizona • Denver, Colorado + 22 more
Source: ClinicalTrials.gov public record
Updated Jun 12, 2016 · Synced Jun 25, 2026, 5:35 AM EDT
Completed Phase 2 Interventional Results available

Tipifarnib and Fulvestrant in Hormone Receptor-Positive Metastatic Breast Cancer

NCT00082810
View directory record Official record
Conditions
Estrogen Receptor-positive Breast Cancer, Recurrent Breast Cancer, Stage IIIB Breast Cancer, Stage IIIC Breast Cancer, Stage IV Breast Cancer
Interventions
fulvestrant, tipifarnib
Drug
Lead sponsor
National Cancer Institute (NCI)
NIH
Eligibility
18 Years and older · Female only
Enrollment
33 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2004 – 2008
U.S. locations
1
States / cities
The Bronx, New York
Source: ClinicalTrials.gov public record
Updated Oct 31, 2018 · Synced Jun 25, 2026, 5:35 AM EDT
Active, not recruiting Phase 1 Interventional

BYL719 and Letrozole in Post-Menopausal Patients With Hormone Receptor-Positive Metastatic Breast Cancer

NCT01791478
View directory record Official record
Conditions
Estrogen Receptor-positive Breast Cancer, HER2-negative Breast Cancer, Invasive Ductal Breast Carcinoma, Progesterone Receptor-positive Breast Cancer, Recurrent Breast Cancer, Stage IV Breast Cancer
Interventions
PI3K inhibitor BYL719, letrozole, laboratory biomarker analysis, pharmacological studies
Drug · Other
Lead sponsor
Vanderbilt-Ingram Cancer Center
Other
Eligibility
18 Years and older · Female only
Enrollment
46 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2025
U.S. locations
2
States / cities
Boston, Massachusetts • Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Jul 22, 2024 · Synced Jun 25, 2026, 5:35 AM EDT
Terminated Phase 3 Interventional

Treatment and Survival Continuation Study of Atamestane Plus Toremifene vs Letrozole in Advanced Breast Cancer

NCT00267553
View directory record Official record
Conditions
Breast Neoplasms, Neoplasms, Hormone-Dependent
Interventions
Atamestane, toremifene, letrozole
Drug
Lead sponsor
Intarcia Therapeutics
Industry
Eligibility
18 Years and older · Female only
Enrollment
200 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2006
U.S. locations
6
States / cities
Greenbrae, California • Saint Joseph, Michigan • Kansas City, Missouri + 3 more
Source: ClinicalTrials.gov public record
Updated Sep 9, 2007 · Synced Jun 25, 2026, 5:35 AM EDT
Terminated Phase 1Phase 2 Interventional Results available

Javelin Parp Medley: Avelumab Plus Talazoparib In Locally Advanced Or Metastatic Solid Tumors

NCT03330405
View directory record Official record
Conditions
Avelumab in Combination With Talazoparib Will be Investigated in Patients With Locally Advanced (Primary or Recurrent) or Metastatic Solid Tumors
Interventions
Avelumab Phase 1b, Talazoparib Phase 1b, Avelumab Phase 2, Talazoparib Phase 2
Drug
Lead sponsor
Pfizer
Industry
Eligibility
18 Years and older
Enrollment
223 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2023
U.S. locations
38
States / cities
Fayetteville, Arkansas • Rogers, Arkansas • Springdale, Arkansas + 12 more
Source: ClinicalTrials.gov public record
Updated Oct 12, 2023 · Synced Jun 25, 2026, 5:35 AM EDT
Recruiting Phase 1Phase 2 Interventional

Sapanisertib and Serabelisib (PIKTOR) in Various Combinations in Patients With HR+/HER2- Advanced/Metastatic Breast Cancer

NCT07558733
View directory record Official record
Conditions
HR+ HER2- Breast Cancer
Interventions
Serabelisib, Sapanisertib, Fulvestrant
Drug
Lead sponsor
Faeth Therapeutics
Industry
Eligibility
18 Years and older
Enrollment
32 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2033
U.S. locations
3
States / cities
Los Angeles, California • Springfield, Oregon • Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Apr 29, 2026 · Synced Jun 25, 2026, 5:35 AM EDT
Completed Phase 1 Interventional

Study of LEE011 With Fulvestrant and BYL719 or BKM120 in Advanced Breast Cancer

NCT02088684
View directory record Official record
Conditions
Breast Cancer
Interventions
LEE011, BYL719, fulvestrant, BKM120
Drug
Lead sponsor
Novartis Pharmaceuticals
Industry
Eligibility
18 Years and older · Female only
Enrollment
70 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2018
U.S. locations
3
States / cities
Birmingham, Alabama • Boston, Massachusetts • Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Dec 16, 2020 · Synced Jun 25, 2026, 5:35 AM EDT
Recruiting Phase 3 Interventional

Phase 3 Study of RLY-2608 + Fulvestrant vs Capivasertib + Fulvestrant as Treatment for Locally Advanced or Metastatic PIK3CA-mutant HR+/HER2- Breast Cancer

NCT06982521
View directory record Official record
Conditions
PIK3CA Mutation, HER2- Negative Breast Cancer, Hormone Receptor Positive Tumor, Breast Cancer, Metastatic Breast Cancer, Advanced Breast Cancer
Interventions
RLY-2608, Capivasertib, Fulvestrant
Drug
Lead sponsor
Relay Therapeutics, Inc.
Industry
Eligibility
18 Years and older
Enrollment
540 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2031
U.S. locations
51
States / cities
Gilbert, Arizona • Beverly Hills, California • Duarte, California + 41 more
Source: ClinicalTrials.gov public record
Updated Jun 10, 2026 · Synced Jun 25, 2026, 5:35 AM EDT
Terminated Phase 2 Interventional

Vaccine Therapy in Treating Patients With Stage IV Hormone Receptor Positive Breast Cancer

NCT01729884
View directory record Official record
Conditions
HER2-positive Breast Cancer, Male Breast Cancer, Recurrent Breast Cancer, Stage IV Breast Cancer
Interventions
HER-2/neu peptide vaccine
Biological
Lead sponsor
University of Washington
Other
Eligibility
19 Years and older
Enrollment
3 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
Started 2012
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Apr 10, 2017 · Synced Jun 25, 2026, 5:35 AM EDT
Recruiting Phase 2 Interventional

Ribociclib And Endocrine Treatment of Physician's Choice for Locoregional Recurrent, Resected Hormone Receptor Positive HER2 Negative Breast Cancer

NCT05467891
View directory record Official record
Conditions
Locoregional Recurrence, Hormone Receptor-positive Breast Cancer, HER2-negative Breast Cancer
Interventions
Ribociclib, Fulvestrant, Anastrozole, Letrozole, Exemestane
Drug
Lead sponsor
Oana Danciu
Other
Eligibility
18 Years and older
Enrollment
200 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2029
U.S. locations
20
States / cities
Birmingham, Alabama • Phoenix, Arizona • Orlando, Florida + 17 more
Source: ClinicalTrials.gov public record
Updated Apr 7, 2026 · Synced Jun 25, 2026, 5:35 AM EDT
Completed Phase 1 Interventional

Drug-Drug Interaction Study of Entinostat and Exemestane in Postmenopausal Women With ER+ Breast Cancer

NCT02820961
View directory record Official record
Conditions
Breast Cancer, Estrogen Receptor Positive Breast Cancer
Interventions
entinostat, exemestane
Drug
Lead sponsor
Syndax Pharmaceuticals
Industry
Eligibility
18 Years to 85 Years · Female only
Enrollment
61 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2021
U.S. locations
3
States / cities
Denver, Colorado • Sarasota, Florida • Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Dec 14, 2021 · Synced Jun 25, 2026, 5:35 AM EDT
Terminated Phase 2 Interventional Results available

Sorafenib and Fulvestrant in Treating Patients With Locally Advanced or Metastatic Breast Cancer That Did Not Respond to Aromatase Inhibitor Therapy

NCT00722072
View directory record Official record
Conditions
Breast Cancer
Interventions
fulvestrant, sorafenib tosylate
Drug
Lead sponsor
OHSU Knight Cancer Institute
Other
Eligibility
18 Years to 120 Years
Enrollment
12 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2012
U.S. locations
1
States / cities
Portland, Oregon
Source: ClinicalTrials.gov public record
Updated Feb 25, 2018 · Synced Jun 25, 2026, 5:35 AM EDT
Recruiting Phase 1 Interventional

Safety and Tolerability of ²¹²Pb-DOTAM-GRPR1 in Adult Subjects With Recurrent or Metastatic GRPR-expressing Tumors

NCT05283330
View directory record Official record
Conditions
Cervical Cancer, Breast Cancer, Colon Cancer, NSCLC, mCRPC (Metastatic Castration-resistant Prostate Cancer), Glioblastoma, Nonsmall Cell Lung Cancer
Interventions
²¹²Pb-DOTAM-GRPR1
Drug
Lead sponsor
Orano Med Theranostics, SAS
Industry
Eligibility
18 Years and older
Enrollment
48 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2032
U.S. locations
8
States / cities
Chicago, Illinois • Iowa City, Iowa • Lexington, Kentucky + 3 more
Source: ClinicalTrials.gov public record
Updated Jun 10, 2026 · Synced Jun 25, 2026, 5:35 AM EDT
Terminated Phase 2 Interventional Results available

Pharmacokinetically Guided Everolimus in Patients With Breast Cancer, Pancreatic Neuroendocrine Tumors, or Kidney Cancer

NCT02273752
View directory record Official record
Conditions
Estrogen Receptor-positive Breast Cancer, Gastrinoma, Glucagonoma, HER2-negative Breast Cancer, Insulinoma, Mucositis, Oral Complications, Pancreatic Polypeptide Tumor, Progesterone Receptor-positive Breast Cancer, Recurrent Breast Cancer, Recurrent Islet Cell Carcinoma, Recurrent Renal Cell Cancer, Somatostatinoma, Stage III Renal Cell Cancer, Stage IIIA Breast Cancer, Stage IIIB Breast Cancer, Stage IIIC Breast Cancer, Stage IV Breast Cancer, Stage IV Renal Cell Cancer
Interventions
Everolimus
Drug
Lead sponsor
Emory University
Other
Eligibility
18 Years and older
Enrollment
2 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2015
U.S. locations
2
States / cities
Atlanta, Georgia
Source: ClinicalTrials.gov public record
Updated Feb 2, 2017 · Synced Jun 25, 2026, 5:35 AM EDT
Completed No phase listed Observational

A Study to Learn About the Relationship Between Hepatic Impairment and Myelosuppression (Decreased Bone Marrow Function) in Breast Cancer Patients Treated With the Study Medicine Palbociclib (Pal-bow-sai-klib)

NCT05912933
View directory record Official record
Conditions
Breast Cancer
Interventions
Not listed
Lead sponsor
Pfizer
Industry
Eligibility
0 Years and older
Enrollment
733 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Jun 12, 2025 · Synced Jun 25, 2026, 5:35 AM EDT
Active, not recruiting Phase 3 Interventional Results available

A Study of Nonsteroidal Aromatase Inhibitors Plus Abemaciclib (LY2835219) in Postmenopausal Women With Breast Cancer

NCT02246621
View directory record Official record
Conditions
Breast Cancer
Interventions
Abemaciclib, Anastrozole, Letrozole, Placebo
Drug
Lead sponsor
Eli Lilly and Company
Industry
Eligibility
18 Years and older · Female only
Enrollment
493 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2026
U.S. locations
20
States / cities
Chandler, Arizona • Springdale, Arkansas • Bakersfield, California + 13 more
Source: ClinicalTrials.gov public record
Updated Feb 2, 2026 · Synced Jun 25, 2026, 5:35 AM EDT
Recruiting Phase 2 Interventional

A Study of Alisertib in Combination With Endocrine Therapy in Patients With HR-positive, HER2-negative Recurrent or Metastatic Breast Cancer

NCT06369285
View directory record Official record
Conditions
Hormone Receptor Positive HER-2 Negative Breast Cancer, Metastatic Breast Cancer, Recurrent Breast Cancer
Interventions
Alisertib, Endocrine therapy
Drug
Lead sponsor
Puma Biotechnology, Inc.
Industry
Eligibility
18 Years and older
Enrollment
150 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2028
U.S. locations
35
States / cities
Birmingham, Alabama • Phoenix, Arizona • Beverly Hills, California + 28 more
Source: ClinicalTrials.gov public record
Updated Dec 9, 2025 · Synced Jun 25, 2026, 5:35 AM EDT
Active, not recruiting Phase 2 Interventional Results available

Serial FES PET/CT to Measure Hormone Expression in Patients Undergoing Endocrine Targeted Therapy

NCT04692103
View directory record Official record
Conditions
Estrogen Receptor Positive, Primary or Recurrent Breast Carcinoma, Stage IV Breast Cancer AJCC v6 and v7
Interventions
F-18 16 Alpha-Fluoroestradiol, Positron Emission Tomography, Computed Tomography, Fludeoxyglucose F-18, Laboratory Biomarker Analysis
Drug · Procedure · Other
Lead sponsor
University of Washington
Other
Eligibility
18 Years and older
Enrollment
2 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2041
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Jan 21, 2026 · Synced Jun 25, 2026, 5:35 AM EDT
Active, not recruiting Phase 3 Interventional Results available

Exemestane With or Without Entinostat in Treating Patients With Recurrent Hormone Receptor-Positive Breast Cancer That is Locally Advanced or Metastatic

NCT02115282
View directory record Official record
Conditions
Anatomic Stage III Breast Cancer AJCC v8, Anatomic Stage IV Breast Cancer AJCC v8, Breast Adenocarcinoma, HER2/Neu Negative, Locally Advanced Breast Carcinoma, Metastatic Breast Carcinoma, Recurrent Breast Carcinoma
Interventions
Biospecimen Collection, Computed Tomography, Entinostat, Exemestane, Goserelin, Goserelin Acetate, Magnetic Resonance Imaging, Placebo Administration, Quality-of-Life Assessment
Procedure · Drug · Other
Lead sponsor
National Cancer Institute (NCI)
NIH
Eligibility
18 Years and older
Enrollment
608 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2026
U.S. locations
654
States / cities
Birmingham, Alabama • Jonesboro, Arkansas • Carmichael, California + 461 more
Source: ClinicalTrials.gov public record
Updated May 28, 2026 · Synced Jun 25, 2026, 5:35 AM EDT
Terminated Phase 2 Interventional

Letrozole and Celecoxib in Treating Postmenopausal Women With Locally Advanced or Metastatic Breast Cancer

NCT00101062
View directory record Official record
Conditions
Breast Cancer
Interventions
celecoxib, letrozole
Drug
Lead sponsor
University of Medicine and Dentistry of New Jersey
Other
Eligibility
18 Years and older · Female only
Healthy volunteers
Healthy volunteers not accepted
Timeline
2004 – 2005
U.S. locations
1
States / cities
New Brunswick, New Jersey
Source: ClinicalTrials.gov public record
Updated Jun 7, 2011 · Synced Jun 25, 2026, 5:35 AM EDT
Recruiting Phase 1 Interventional

A Phase 1 Study of 68Ga-R11228 and 177Lu-R11228 in Breast Cancer

NCT07121244
View directory record Official record
Conditions
Locoregionally Recurrent Hormone-receptor Positive Breast Cancer, Metastatic Hormone Receptor Positive Breast Cancer
Interventions
68Ga-R11228, 177Lu-R11228
Drug
Lead sponsor
Radionetics Oncology
Industry
Eligibility
18 Years and older
Enrollment
62 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2033
U.S. locations
6
States / cities
Indianapolis, Indiana • Glen Burnie, Maryland • Princeton, New Jersey + 3 more
Source: ClinicalTrials.gov public record
Updated Apr 12, 2026 · Synced Jun 25, 2026, 5:35 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 Jun 25, 2026, 5:35 AM EDT