Evaluation of discordant laboratory data in patients with thyroid disorders.

ABSTRACT

The usefulness of the various tests of thyroid function has been evaluated over a three-year period. It is concluded that an uptake test and estimation of the serum protein-bound radioactive iodine (PB (131)I), supplemented as required by the protein-bound iodine (PBI), remain the best routine tests of thyroid function. Forty-five patients who gave discordant results on these tests over this period have been studied in detail and the value of other tests of thyroid function has been explored.