Abstract
Summary
Dosages of I131 from 3 to 50 millicuries per kilogram were given to young mice on a normal diet. Higher dosages produced complete thyroidal destruction within a few days. Lower dosages permitted survival of some thyroidal epithelium in the iathmus and cranial apex of the thyroid for as long as 120 days after injection, but resulted in loss of the parathyroids. Lesions were noted in the tracheal epithelium with all does ages, md in the recurrent laryngeal nerve with higher dosages.
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