NCI Dictionary of Cancer Terms
The NCI Dictionary of Cancer Terms features 8,098 terms related to cancer and medicine.
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- samarium Sm 153
- listen (suh-MAYR-ee-um ...)
- A radioactive substance used in the treatment of bone cancer and bone metastases (cancers that have spread from the original tumor 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. Samarium Sm 153 is a type of radioisotope.