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.

A drug used to treat prostate cancer that has spread to the bone and has not gotten better with other treatment. It is also being studied in the treatment of other types of cancer. Xofigo contains a radioactive substance called radium 223. Radium 223 collects in bone and gives off radiation that may kill cancer cells. Xofigo is a type of radiopharmaceutical. Also called radium 223 dichloride.