Breast Carcinoma Clinical Trial
Official title:
ECLECTIC: EstroTEP and Circulating Biomarkers to Determine the Optimal Second Line Therapy for ER-positive HER2-negative Metastatic Breast Cancer Patients
Eclectic is a strategy trial; once the class of treatment (endocrine therapy or chemotherapy) has been allocated according to 16α-18F-fluoro-17β-oestradiol (18F-FES) Positron Emission Tomography/Computed Tomography (PET/CT) results and circulating tumor biomarkers, clinicians will decide which treatment to use.
All patients deemed eligible for a second line endocrine therapy will undergo a 18F-FES PET/CT scan and circulating tumor biomarkers assessment (circulating tumor cells (CTC) and, if not available, circulating tumor DNA (ctDNA)). All 18F-FES PET/CT scan will be anonymized and reviewed centrally, and compared to the 18Fluorodeoxyglucose (18F-FDG) PET/CT results before treatment initiation; circulating biomarkers status will be assessed centrally and will remain blinded to investigator and patients. Endocrine therapy in Arm A and C may consist in single agent endocrine therapy or in combination with targeted therapy. Luteinizing Hormone-Releasing Hormone (LH-RH) agonist will be used in combination with endocrine therapy whenever appropriate and per label. Chemotherapy in Arm B may consist in single agent chemotherapy, poly-chemotherapy, or antibody-drug conjugates. Patients who are eligible (per drug label) may receive Poly-adenosine-5'-diphosphate-ribose Polymerase (PARP) inhibitor if allocated to Arm B. ;
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