[A radioimmunoconjugate of monoclonal antibody (MoAb) B3 conjugated with isotope yttrium 90. MoAb B3 is a murine MoAb that recognizes a Lewis Y carbohydrate antigen present on the surface of many carcinomas. This radioimmunoconjugate emits beta particles that causes cytotoxicity in tumor cells and has both diagnostic and therapeutic uses. ( NCI )] (UMLS (NCI) C0935761) MOAB B3, Yttrium Y 90; Y 90 Monoclonal Antibody B3; Y90-B3; Yttrium Y 90 Monoclonal Antibody B3 =Amino Acid, Peptide, or Protein; Pharmacologic Substance; Immunologic Factor