bt} Although this ae Thyvold cancer hes duvelolped in one atuit. singie oceur- 1 rence is not ce finitive evidence, tha possible relationship of carcinorenasis to fFaliout radiation must be seriously evaluated. The effect of exogenously administered thyroid hormone on the risk of cancer of the thyroid gland Su the drradgticted humcn is unknown. However, the suppression of nodule ferme- tion in the divadiated thyroid gland of the rah has been reported”, s s ’ 3 Thé early clinical and endocrinoloric evaluations hnd not ¢elineated rn * : ws S Jd clearly the techanism for growth failure in soua of the Rongelav children!>, Leter studies have deronstrated abnormalities that indicate, with increasing probability, that the oe er wth retardation has been the result of hypofunction 6 ef the thyroid gland in these childrent®> 17 . . . the sienifitean: grevth spurt du the most retarded children followingwe adwinistration of thyroid hovmore eon be considercd ctrong corroborative evidence. 5001338