乳腺癌是女性常见的恶性肿瘤之一,目前全世界每年约有120万名妇女患乳腺癌。在我国北京、上海、广州等大城市发病率近年来明显升高,已经成为女性发生率最高的恶性肿瘤。北京从1978年开始,乳腺癌已经位居妇女恶性肿瘤发病率的首位,还在以每年3%的速度上升。近年来,中国大城市中的乳腺癌发病率增长了 Breast cancer is one of the most common cancers among women. At present, approximately 1.2 million women worldwide suffer from breast cancer each year. In China, the incidence of major cities such as Beijing, Shanghai and Guangzhou has increased significantly in recent years and has become the highest incidence of female malignant tumors. Since 1978, Beijing has ranked first in the incidence of malignant tumors among women and is still rising at a rate of 3% per year. In recent years, the incidence of breast cancer has increased in China’s large cities.