Evaluation of an immunoradiometric assay for the detection of an ovarian tumour marker, CA125, in serum.

An immunoradiometric assay, that uses a monoclonal antibody attached to a solid support and developed for the detection of the ovarian tumour antigen, CA125, in serum, has been evaluated. The method was simple to perform, with reagents having a shelf-life of approximately 4 weeks. The potentials and limitations of this test are discussed.