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Brief Title: Serial FES PET/CT to Measure Hormone Expression in Patients Undergoing Endocrine Targeted Therapy
Official Title: Serial [F-18] Fluoroestradiol (FES) PET Imaging to Evaluate Endocrine-targeted Therapy
Study ID: NCT04692103
Brief Summary: This clinical trial studies use of F-18 16 alpha-fluoroestradiol (\[F-18\] FES) positron emission tomography (PET)/computed tomography (CT) in measuring tumor hormone receptor expression in patients undergoing endocrine-targeted therapy for newly diagnosed breast cancer or breast cancer that has come back or spread to other places in the body. Comparing results of diagnostic procedures done before, during, and after hormone therapy may help measure a patient's response to treatment.
Detailed Description: OUTLINE: Patients undergo F-18 FES PET/CT scan at baseline. Patients also undergo F-18 FES PET/CT and FDG PET/CT between 1-12 weeks after starting therapy, and then 1-12 weeks after the second FES PET/CT scan. Repeat FDG PET may be omitted in patients on selective estrogen receptor degrader. After completion of study, patients are followed up for up to 20 years.
Minimum Age: 18 Years
Eligible Ages: ADULT, OLDER_ADULT
Sex: ALL
Healthy Volunteers: No
Fred Hutch/University of Washington Cancer Consortium, Seattle, Washington, United States
Name: Hannah Linden
Affiliation: Fred Hutch/University of Washington Cancer Consortium
Role: PRINCIPAL_INVESTIGATOR