Wallach's Interpretation of Diagnostic Tests: Pathways to Arriving at a Clinical Diagnosis (1240 page)

   Thyroid hormone administration (T
₃
or T
₄
)

   Therapeutic

   Factitious (RAIU is augmented after TSH administration)

   Antithyroid medication

   Iodine-induced hyperthyroidism (Jodbasedow)

   X-ray contrast media, iodine-containing drugs, iodized salt

   Graves disease with iodine excess

   Ectopic hypersecreting thyroid tissue

   Metastatic functioning thyroid carcinoma

   Struma ovarii

   Drugs (e.g., calcitonin, thyroglobulin, corticosteroids, dopamine)

   Limitations

   Contraindications: pregnancy, lactation, childhood.

   Not valid for 2–4 weeks after administration of antithyroid drugs, thyroid, or iodides; the effect of organic iodine (e.g., x-ray contrast media) may persist for a much longer period.