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Spuriously high free thyroxine with the Amerlite MAB FT4 assay
1Department of Clinical Biochemistry, Freeman Hospital, Newcastle upon Tyne.
Journal of Clinical Pathology
|February 1, 1994
Abstract:
In the Amerlite MAB FT4 assay, as stated by the manufacturer, FT4 values should be normal in patients with anti-thyroid hormone autoantibodies. The case of a 69 year old woman with a spuriously high FT4 using the Amerlite MAB FT4 assay is reported. Laboratory investigations showed that her spurious FT4 result was likely to have been caused by anti-thyroid hormone autoantibodies.