随着诊断学技术的不断提高，紧癌的发病率也呈逐渐上升趋势。自1973年以来美国其发病率增加43％，病死率增加16％，已引起人们的广泛注意。现将近年来国外的研究状况综述如下。1流行病学Marshall等[1]报道，男性患肾癌的危险性为女性的2～3倍。平均发病年龄为65岁，儿童发病率 With the continuous improvement of diagnostic techniques, the incidence of cancer also showed a gradual upward trend. Since 1973, the United States increased its incidence by 43% and its case fatality rate by 16%, attracting widespread attention. In recent years, the research status of foreign countries are summarized as follows. 1 epidemiology Marshall et al [1] reported that men suffering from kidney cancer risk for women 2 to 3 times. The average age of onset was 65 years old, the incidence of children