Breast cancer is endangering the health of women malignant tumors, the incidence of breast cancer with misprision, after more poor characteristics. Breast cancer occurred mainly in the female, male rare, the incidence of women for men nearly a hundredfold. North America, is the Nordic regions with a high incidence of breast cancer, the incidence rate of about Asia, Africa, Latin America four times. Although China is the low areas of breast cancer, but its incidence is increasing year by year, especially Shanghai, Beijing, Tianjin and China's coastal regions with a high incidence of breast cancer, the highest in Shanghai, Shanghai in 1972 of breast cancer incidence rate of 20.1 / 100000, 28/10 million in 1988 compared with an annual average of 2% - 7 percent increase. According to statistics, there are about 1.2 million worldwide each year of breast cancer in women, there are 500,000 women die from breast cancer. Currently the incidence of breast cancer has been the first female malignancy leapt to the first two, the mortality rate as high as 40 percent. On the serious harm to human health has caused the World Health Organization and the medical profession are highly valued.
