Abstract
Breast cancer is the leading cause of cancer-related death in women worldwide, and the luminal subtype is the most common, accounting for approximately 70-80% of cases. This subtype is characterized by the expression of estrogen receptors (ER) by the tumor in the immunohistochemical analysis of percutaneous biopsy specimens. Recently, PET/CT with 18F-Fluoroestradiol (18F-FES) has emerged …