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NCI Dictionary of Cancer Terms


F-18 16 alpha-fluoroestradiol  listen  (… AL-fuh-FLOOR-oh-es-truh-DY-ol)

  A radiolabeled substance being studied as an imaging agent in breast cancer. F-18 16 alpha-fluoroestradiol binds to estrogen receptors and gives off radiation that can be detected by a PET scan. The PET scan forms an image that shows where cancer cells with estrogen receptors can be found in the body. It is a type of radioimaging agent. Also called F-18 FES.