克山病自1935年在我国黑龙江省克山县一带发现以来,迄今已有45年的历史。关于克山病的病理变化已有许多研究和报导,但对病变性质的看法还不一致,其病因尚不清楚。历年来在延边各县部分地区均有克山病发生,解放后由于防治工作的大力开展,使发病率及病死率均明显下降。在敦化县、汪 Keshan disease has been in existence for 45 years in Keshan County, Heilongjiang Province since 1935. There are many studies and reports on the pathological changes of Keshan disease. However, the opinions about the nature of the lesion are not consistent, and the etiology of the disease is not clear. Over the years, Keshan disease has occurred in some areas in all counties of Yanbian. After the liberation, due to the vigorous prevention and control work, the morbidity and mortality rate dropped significantly. In Dunhua County, Wang