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乳腺癌的增加是世界范围的普遍现象,最早欧美国家的发病率高,但现在发展中国家、特别是东亚经济发达的国家和地区也在显著增加。据日本大阪统计,1996～1998年乳腺癌的患病率(46.0)是30年前(1966～1968年为10.5)的4.5倍。即乳腺癌发病与生活水平的提高、营养状况的改善有关。日本乳腺癌的患病特点:①年龄分布:一般癌症在50岁左右开始增加,之后发病率随着年龄的增加呈直线上升。但乳腺癌却有明显不同,30岁以后开始增加,40～49岁达到
The increase of breast cancer is a worldwide phenomenon, with the earliest incidence rates in Europe and the United States. However, the number of developing countries, especially those with developed economies in East Asia, is also on the rise. According to statistics from Osaka, Japan, the prevalence of breast cancer (46.0) from 1996 to 1998 was 4.5 times that of 30 years ago (10.5 from 1966 to 1968). That the incidence of breast cancer and improve living standards, nutritional status of the improvement. The prevalence of breast cancer in Japan features: ① age distribution: General cancer began to increase in the 50-year-old, then the incidence increased linearly with age. However, there are significant differences in breast cancer, began to increase after the age of 30, 40 to 49 years of age