NCI Dictionary of Cancer Terms
The NCI Dictionary of Cancer Terms features 8,299 terms related to cancer and medicine.
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- samarium Sm 153
- listen (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.