ABSTRACT
Breast cancer is currently the second leading cause of cancer deaths in women and is the most common cancer among women. According to the Word Health Organization reported, >1.2 million people will be diagnosed with breast cancer each year worldwide, and approximately 500,000 of them died. inChinese women, around 27% of female breast cancers are linked to largely modifiable lifestyle and environmental factors. There is an rapidly increasing trend for breast cancer incidence and mortality in our country. Research shows average annual growth rate is about 2% higher than that of the developed countries and is increasing at an annual rate of 3%. Breast cancer had already been the primacy malignant tumor of the female in some big cities such as Peking, Tianjin and Shanghai.
