Elevated thyroxine levels in a euthyroid patient

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Euthyroid hyperthyroxinemia is often misdiagnosed, resulting in inappropriate treatment with ablation or surgical removal of the thyroid gland. Therefore, it is important that primary care physicians be familiar with the causes of this disorder. This case report describes the diagnostic approach taken in one patient and discusses normal thyroid physiology.

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Notes on contributors

Harry L. Uy

Harry L. Uy, MD Charles A. Reasner II, MD Dr Uy is a third-year fellow and Dr Reasner is associate professor of medicine, department of medicine, division of endocrinology, University of Texas Health Science Center at San Antonio.

Charles A. Reasner

Harry L. Uy, MD Charles A. Reasner II, MD Dr Uy is a third-year fellow and Dr Reasner is associate professor of medicine, department of medicine, division of endocrinology, University of Texas Health Science Center at San Antonio.