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Showing 1–13 of 13 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: F-18 FES Clear all
Completed Not applicable Interventional Results available

Vorinostat in Treating Patients With Stage IV Breast Cancer Receiving Hormone Therapy

NCT01720602
View directory record Official record
Conditions
Male Breast Cancer, Recurrent Breast Cancer, Stage IV Breast Cancer
Interventions
vorinostat, anastrozole, letrozole, exemestane, positron emission tomography, F-18 16 alpha-fluoroestradiol, fludeoxyglucose F 18, laboratory biomarker analysis
Drug · Procedure · Radiation + 1 more
Lead sponsor
University of Washington
Other
Eligibility
18 Years and older
Enrollment
15 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2020
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Jan 6, 2020 · Synced Sep 10, 2026, 1:29 AM EDT
Terminated Early Phase 1 Interventional

18F-FES PET/CT in Imaging Patients With Desmoid Tumors

NCT02374931
View directory record Official record
Conditions
Deep Fibromatosis/Desmoid Tumor, Familial Adenomatous Polyposis
Interventions
F-18 16 Alpha-Fluoroestradiol, Positron Emission Tomography, Computed Tomography, Laboratory Biomarker Analysis
Drug · Procedure · Other
Lead sponsor
Vanderbilt-Ingram Cancer Center
Other
Eligibility
18 Years and older
Enrollment
3 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2017
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Oct 2, 2019 · Synced Sep 10, 2026, 1:29 AM EDT
Withdrawn Phase 2 Interventional

Test - Retest Reproducibility of 18F Fluoroestradiol (FES) PET

NCT03065712
View directory record Official record
Conditions
Breast Cancer
Interventions
F-18 Fluoroestradiol, Computed Tomography, Positron Emission Tomography, Laboratory Biomarker Analysis
Drug · Procedure · Other
Lead sponsor
University of Texas Southwestern Medical Center
Other
Eligibility
18 Years and older
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2021
U.S. locations
1
States / cities
Dallas, Texas
Source: ClinicalTrials.gov public record
Updated May 11, 2020 · Synced Sep 10, 2026, 1:29 AM EDT
Active, not recruiting Phase 2 Interventional

FES PET/CT in Predicting Response in Patients With Newly Diagnosed Metastatic Breast Cancer Receiving Endocrine Therapy

NCT02398773
View directory record Official record
Conditions
HER2/Neu Negative, Progesterone Receptor Negative, Progesterone Receptor Positive, Stage IV Breast Cancer AJCC v6 and v7
Interventions
Computed Tomography, F-18 16 Alpha-Fluoroestradiol, Laboratory Biomarker Analysis, Positron Emission Tomography
Procedure · Drug · Other
Lead sponsor
National Cancer Institute (NCI)
NIH
Eligibility
18 Years and older
Enrollment
99 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2026
U.S. locations
25
States / cities
Birmingham, Alabama • Duarte, California • Los Angeles, California + 16 more
Source: ClinicalTrials.gov public record
Updated Jun 28, 2026 · Synced Sep 10, 2026, 1:29 AM EDT
Withdrawn Not applicable Interventional

Estrogen Receptor Expression in Breast Cancer - Assessed With Positron Emission Mammography

NCT03266562
View directory record Official record
Conditions
Breast Neoplasm
Interventions
F-18 FES, F-18 FDG
Diagnostic Test
Lead sponsor
Mayo Clinic
Other
Eligibility
40 Years to 90 Years · Female only
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2019
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated May 8, 2019 · Synced Sep 10, 2026, 1:29 AM EDT
Recruiting Phase 2 Interventional

A Vaccine (STEMVAC) With Standard Endocrine-Based Therapy or Chemotherapy for the Treatment of Metastatic Hormone Receptor Positive, HER2 Negative Breast Cancer

NCT07112053
View directory record Official record
Conditions
Anatomic Stage IV Breast Cancer AJCC v8, Metastatic HER2-Negative Breast Carcinoma, Metastatic Hormone Receptor-Positive Breast Carcinoma
Interventions
CD105/Yb-1/SOX2/CDH3/MDM2-polyepitope Plasmid DNA Vaccine, Capecitabine, Computed Tomography, Cyclin-Dependent Kinase 4 Inhibitor, Cyclin-Dependent Kinase 6 Inhibitor, F-18 16 Alpha-Fluoroestradiol, Hormone Therapy, Positron Emission Tomography, Biopsy Procedure, Biospecimen Collection, Abemaciclib
Biological · Drug · Procedure
Lead sponsor
University of Washington
Other
Eligibility
18 Years and older
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2028
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Apr 5, 2026 · Synced Sep 10, 2026, 1:29 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 Jun 30, 2026 · Synced Sep 10, 2026, 1:29 AM EDT
Withdrawn Phase 1Phase 2 Interventional

Evaluating Endometriosis With 16α-(18)F-fluoro-17β-estradiol ([F-18] FES) PET/MRI

NCT04347135
View directory record Official record
Conditions
Endometriosis
Interventions
F-18 FES
Drug
Lead sponsor
Annie (Annie) T. Packard
Other
Eligibility
18 Years to 50 Years · Female only
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2024
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated May 9, 2024 · Synced Sep 10, 2026, 1:29 AM EDT
Terminated No phase listed Observational

Clinical Utility of FES F18 PET/CT in Metastatic Breast Cancer Patients

NCT05068726
View directory record Official record
Conditions
Metastatic Breast Cancer
Interventions
18F Fluoroestradiol Radiopharmaceutical with PET/CT
Drug
Lead sponsor
GE Healthcare
Industry
Eligibility
18 Years to 99 Years · Female only
Enrollment
51 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2024
U.S. locations
24
States / cities
Flagstaff, Arizona • Cerritos, California • Duarte, California + 20 more
Source: ClinicalTrials.gov public record
Updated Jul 30, 2024 · Synced Sep 10, 2026, 1:29 AM EDT
Terminated Not applicable Interventional Results available

F-18 FES PET/CT in Measuring Hormone Expression in Patients With Primary, Recurrent, or Metastatic Breast Cancer Undergoing Endocrine-Targeted Therapy

NCT02149173
View directory record Official record
Conditions
Estrogen Receptor Positive, Recurrent Breast Carcinoma, Stage IV Breast Cancer AJCC v6 and v7
Interventions
Computed Tomography, F-18 16 Alpha-Fluoroestradiol, Fludeoxyglucose F-18, Laboratory Biomarker Analysis, Positron Emission Tomography
Procedure · Drug · Other
Lead sponsor
University of Washington
Other
Eligibility
18 Years and older
Enrollment
29 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2021
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Jun 29, 2021 · Synced Sep 10, 2026, 1:29 AM EDT
Completed Phase 2 Interventional Results available

F-18 16 Alpha-Fluoroestradiol-Labeled Positron Emission Tomography in Predicting Response to First-Line Hormone Therapy in Patients With Stage IV Breast Cancer

NCT00602043
View directory record Official record
Conditions
Estrogen Receptor-positive Breast Cancer, Progesterone Receptor-negative Breast Cancer, Progesterone Receptor-positive Breast Cancer, Recurrent Breast Cancer, Stage IV Breast Cancer
Interventions
F-18 16 alpha-fluoroestradiol, fludeoxyglucose F 18, positron emission tomography, computed tomography, laboratory biomarker analysis
Radiation · Procedure · Other
Lead sponsor
National Cancer Institute (NCI)
NIH
Eligibility
18 Years and older · Female only
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2014
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Feb 18, 2020 · Synced Sep 10, 2026, 1:29 AM EDT
Completed Not applicable Interventional Results available

Vorinostat in Treating Patients With Stage IV Breast Cancer Receiving Aromatase Inhibitor Therapy

NCT01153672
View directory record Official record
Conditions
Male Breast Cancer, Recurrent Breast Cancer, Stage IV Breast Cancer
Interventions
vorinostat, laboratory biomarker analysis, biopsy, F-18 16 alpha-fluoroestradiol, positron emission tomography, anastrozole, letrozole, exemestane, gene expression analysis
Drug · Other · Procedure + 2 more
Lead sponsor
University of Washington
Other
Eligibility
18 Years and older
Enrollment
8 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2016
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Sep 5, 2019 · Synced Sep 10, 2026, 1:29 AM EDT
Recruiting Phase 2 Interventional

Stereotactic Body Radiation Therapy and FES PET/CT Imaging for the Treatment of Oligoprogressive Estrogen Receptor Positive Metastatic Breast Cancer

NCT06260033
View directory record Official record
Conditions
Anatomic Stage IV Breast Cancer AJCC v8, Estrogen Receptor-Positive Breast Carcinoma, Metastatic Breast Carcinoma
Interventions
Biospecimen Collection, Bone Scan, Computed Tomography, F-18 16 Alpha-Fluoroestradiol, Positron Emission Tomography, Questionnaire Administration, Stereotactic Body Radiation Therapy
Procedure · Drug · Other + 1 more
Lead sponsor
City of Hope Medical Center
Other
Eligibility
18 Years and older
Enrollment
18 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2026
U.S. locations
2
States / cities
Duarte, California • Irvine, California
Source: ClinicalTrials.gov public record
Updated Oct 5, 2025 · Synced Sep 10, 2026, 1:29 AM EDT