The difference in clearance between kit-prepared technetium-99m-MAG3 and radioiodinated hippuric acid.

extended disability and income loss . . . " To this we have to add expenses from possible anti-thyroid drugs in the interim as well as potential side effects from these medications (2). 3. The results of retreatment with radioiodide have been analyzed in some detail (J). If we define "cured" of hyperthyroidism as being euthyroid or hypothyroid, then expressions are available for describing the results as a function of the quantity of radioiodide administered. Each physician must determine for herself/ himself what fraction of patients they wish to cure with a single dose of radioiodide, while leaving the remainder still hyperthyroid. Choices between radiation exposure, prolonged disease, and possible side effects of anti-thyroid drugs are not easy to make. If evidence mounts of the relative "benign" nature of larger doses of oral radioiodide, therapy of hyperthyroidiam will be simplified.