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NCI Dictionary of Cancer Terms

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The NCI Dictionary of Cancer Terms features 8,214 terms related to cancer and medicine.

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samarium Sm 153
(suh-MAYR-ee-um ...)
A radioactive substance used to treat bone cancer and other cancers that have spread to the bone. Samarium Sm 153 is a radioactive form of the element samarium. It collects in bone, where it releases radiation that may kill cancer cells.