Cancer Glossary - Y

yttrium  (IH-tree-um) A rare elemental metal. A radioactive form of yttrium is used in radiation therapy and some types of immunotherapy.

yttrium Y 90 SMT 487   A substance that is being studied as a treatment for cancer.

yttrium Y90 ibritumomab tiuxetan   An anticancer drug that is a combination of a monoclonal antibody and a radioisotope (yttrium-90). Monoclonal antibodies are laboratory-produced substances that can locate and bind to cancer cells. Also called IDEC-Y2B8 monoclonal antibody.