除环境缺碘外,致甲状腺肿物质的广泛存在是造成地甲肿流行的另一重要因素。尤其近几十年来,世界范围的持续补碘预防地甲肿取得良好效果后,致甲肿物质或/及其它因素导致地甲肿在少数地区持续流行的问题突出暴露出来,成为目前进一步根除地甲肿流行的一个棘手问题,也是当前研究地甲肿的重要课题。 In addition to environmental iodine deficiency, the widespread presence of goiter substances is another important factor contributing to the prevalence of goiter. In particular, in recent decades, the problem of sustained spread of glandular edema and / or other factors in a few areas after the sustained worldwide iodine prophylaxis of gonality has achieved good results has been prominently exposed and has become the target of further eradication A thorny epidemic of a thorny issue, but also the current study of an important issue of gut.