乳腺癌是威胁妇女健康的主要恶性肿瘤 ,美国 2 0 0 0年统计数据表明 ,乳腺癌发病率占全部恶性肿瘤的 30 % ,排第一位 ,死亡率占 15 % ,列第二位。在全球范围内 ,中国的乳腺癌发病率相对较低 ,但近年已有明显上升的趋势。尽管乳癌的发病率持续上升 ,但死亡率已开始下降 ,主要得 Breast cancer is a major malignant tumor that threatens the health of women. According to the statistics of the United States in 2000, the incidence of breast cancer accounts for 30% of all malignant tumors, ranking the first place with the death rate accounting for 15%, ranking the second place. Globally, China’s breast cancer incidence is relatively low, but in recent years there has been a clear upward trend. Although the incidence of breast cancer continues to rise, the mortality rate has started to decline, mainly