autoradiograms demonstrate the metabolism of iodine by the thyroid at only one period , as it is not practicable to obtain serial preparations from one individual , but they do show which follicles are actively engaged in metabolizing iodine into hormone.a low iodine intake and the presence of goitrogenic substances in the diet may be the causes of endemic goitre ;
C0040132
thyroid
C0018022
endemic goitre