Patients with undetectable unstimulated serum Tg levels, measured by high-sensitivity ... A false low TgAb measurement is obtained. Ab: Antibody; TgAb: Thyroglobulin autoantibody.

and levels of thyroglobulin in the washout fluid were measured with a highly sensitive, monoclonal-antibody-based, immunoradiometric assay. The thyroglobulin results were interpreted according to ...