Autoantibodies to thyroid hormones: association with falsely low hormone levels measured by 'Amerlex' assay.
Autoantibodies to thyroxine (T4) and tri-iodothyronine (T3) were found in a 21-yr-old thyrotoxic woman who had paradoxically low T4 and T3 as measured in the 'Amerlex' solid phase radio-immunoassay. Though rare, thyroid hormone antibodies should be suspected if anomalous thyroid function results are obtained and alternate assay procedures used.
D000328:Adult; D001323:Autoantibodies / Q000276:immunology*; D005188:False Negative Reactions; D005260:Female; D006111:Graves Disease / Q000276:immunology*; D006801:Humans; D007163:Immunosorbent Techniques; D011863:Radioimmunoassay; D011933:Reagent Kits, Diagnostic; D013974:Thyroxine / Q000097:blood / Q000276:immunology*; D014284:Triiodothyronine / Q000097:blood / Q000276:immunology*
D001323:Autoantibodies; D011933:Reagent Kits, Diagnostic; D014284:Triiodothyronine; D013974:Thyroxine