NCIt definition : Monoclonal antibodies (MoAb) conjugated with radioisotopes, i.e., I-131, Y-90, T-99,
or In-111. Using radioimmunoconjugates in radiotherapy or radioimaging has the advantage
of targeting cells carrying specific antigens, thereby limiting toxic effects on normal
cells. Tumor eradication can be achieved by either the antibody-mediated immune response
or by only the cytotoxic activity of the radiation.;