Further characterization of iodide-induced hyperthyroidism based on the direct measurement of intrathyroidal iodine stores.

Clinical, scintigraphic and laboratory findings in a group of 23 hyperthyroid patients with inappropriate total intrathyroidal iodine pool (ITI), measured by X-ray fluorescence, were compared to those of 25 hyperthyroid patients with low ITI. Differences are discussed which may be useful in the diagnosis of this clinical entity.