yttrium Y 90 glass microspheres

Definition / meaning of yttrium Y 90 glass microspheres

An injectable formulation of yttrium Y 90 consisting of glass microspheres containing the radioisotope yttrium Y 90. When injected into the tumor vascular bed, yttrium Y 90 glass microspheres occlude tumor blood vessels and deliver a cytotoxic dose of beta radiation to the tumor site, thereby reducing the tumor burden.

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Source(s):

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

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