Last updated: Friday, 06, August, 2010
If the free thyroxine index is used in the initial assessment of thyroid function, some euthyroid patients show increased levels however TSH and thyroxine (free) are normal. If the patient is clinically euthyroid, the raised free thyroxine index is of no clinical significance.
Hereditary excess of TBG
Familial dysalbuminaemic hyperthyroxinaemia
Familial prealbumin hyperthyroxinaemia