Differentiation of Causes of Hyperthyroidism According to Pattern of Radionucleotide Uptake Reduced uptake: • Thyroiditis • Exogenous thyroxine • Iodine loading • Ectopic thyroid hormone secretion (struma ovarii) Generalized increased uptake: • Graves' disease • Excess thyroid-stimulating hormone stimulation Focal increased uptake: • Toxic multinodular goiter • Hyperfunctioning adenoma #rai #radioactive #iodine #radionuclide #uptake #differential #diagnosis #hyperthyroidism #endocrinology
