yttrium Y 90 ibritumomab tiuxetan

Definition / meaning of yttrium Y 90 ibritumomab tiuxetan

A radioimmunotherapeutic agent consisting of a murine monoclonal anti-CD20 antibody (ibritumomab) linked by the chelator tiuxetan to the radioisotope yttrium-90 (Y 90). Yttrium Y 90 ibritumomab tiuxetan binds to and specifically delivers beta radiation to CD20-expressing tumor cells, thereby minimizing the systemic effects of radiation.

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Source(s):

The Web site of the National Cancer Institute (http://www.cancer.gov/)

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