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NCI Drug Dictionary

  

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. Check for active clinical trials or closed clinical trials using this agent. (NCI Thesaurus)
US brand name:TheraSphere