NCI Dictionary of Cancer Terms

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The NCI Dictionary of Cancer Terms features 7,863 terms related to cancer and medicine.

Browse the dictionary by selecting a letter of the alphabet or by entering a cancer-related word or phrase in the search box.

gold fiducial markers
(… fih-DOO-shul MAR-kers)
Tiny, gold seeds, about the size of a grain of rice, that are put in and/or around a tumor to show exactly where it is in the body. Doctors are then able to target the tumor directly and give higher doses of radiation with less harm to nearby healthy tissue. Also called gold fiducial marker seeds, gold seeds, and gold-seed fiducial markers.