2 Imbortance of These Studies If the risk of nuclear accidents or military action is real i= the future, it seems that this area oF investigation is vital to our populatim:.. Bound information on the effectiveness <= srophylactic measures to thwart necsdevelopment aster accidental exposure <2 [allout which contains radioicdines =culdj be very Valuable. The increasing use cf ---I as a therapeutic agent raises some =n Although it seems to be a =~ed, proven and safe therapeutic proce this judgement is based cn =. inadequate period of observation. tfinc toxicosis Follow-up Study «es based on an average follow-up perice xf more study is needed. Mos= <= the thyroid lesions produced by ra=atibn are slow growing lesions so that tne =resence of a mass without apparent owt period is no assurance against malignancy. Reopening that study = = OW up patients already studied for some yeexrs is important. However, tracing 4=- = ividuals in that study who had no palpe-_e masses at the time of treatment =.= 2o operated palpable mass at == close of the study is most importa.c. From the purely pract=i=2]1 standpoint, it 1s important to a ==s1 of the population who deve_=> thyrotoxicosis to have available a ==p therapy,that does not ultimately lead to hypothyroidism and myxec=ma, with I therapy. The tre=<ment is so simple from the patient'= st forgets he was so treated (=> for the first several years proves == thyroid supplement) and the. much later develops hypothyroidism au= without the problem being recognized. Many physicians who treat —=pDe dem see their patient agai because they are well and there is e i=ng] lapse of time before they need further az~ention.