#~]2- cases in which minimal changes were believed to have been palpated (see Table IVA). A consultation with several thyroid experts had been held during the summer in view of the seriousness of the thyroid development in the Marshallese. The concensus was that the exposed people should receive thyroid hormone treatment for the remainder of their lives, in order to attempt prevention of further development of nodules, and possibly induce regression of existing nodules. Accordingly, at the time of the September survey, the 55 people in the more heavily exposed group were begun on synthetic hormone, L-Thyroxin (Synthroid’). A daily dose of 0.3 mg. was given to all people under 50 years of age in the group, and 0.2 mg. per day to all people over 50 years of age. It was decided to leave the new cases with thyroid nodules in the Islands-under hormone treatment, and, if at the time of the forthcoming survey in March 1966, the nodules had not regressed or further nodules had developed, serious consideration would be given to * OESeae cee returning them to the United States for study and possible surgery. Synthroid: Sodium levothyroxine, Flint Laboratories, Morton Grove, Illinois. 500126

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