An Unusual Type of Familial Dysalbuminemic Hyperthyroxinemia in a Japanese Family
Familial dysalbuminemic hyperthyroxinemia (FDH) is a rare entity characterized by elevation of serum thyroxine (T4) due to an increase in the binding of T4 to serum dysalbumin. Serum T4 levels in affected subjects have been reported to be 16–40 µg/dl, while serum free T4 is in normal range. Values for serum T3 and reverse T3 are normal in most cases. In this communication, we present patients with extremely elevated serum T4 (111–136 µg/dl) in a Japanese family.
KeywordsEquilibrium Dialysis Japanese Family Serum Thyroxine Equilibrium Dialysis Method Familial Dysalbuminemic Hyperthyroxinemia
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