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一、前言在英格兰和威尔士乳癌占妇女死因的第四位,仅次于冠心病、卒中、支气管炎或肺炎,而在30—55岁的妇女死因中最属常见,大约4％的女性死于乳癌。1974年英格兰和威尔士新增原发性乳癌22000例,相当于妇女全部癌症的1/4。由于病因不明及危险因素无法控制,故进行普查,而得到早期确诊与治疗,以降低乳癌的死亡率。健康保险计划的研究表明,通过10年随访,普查组乳癌的死亡人数明显低于对照组。50—64岁的妇女死
I. INTRODUCTION Breast cancer accounts for the fourth leading cause of death among women in England and Wales. It is second only to coronary heart disease, stroke, bronchitis, or pneumonia. It is the most common cause of death in women aged 30 to 55. About 4% of women die. Breast cancer. In 1974, 22,000 cases of primary breast cancer were newly diagnosed in England and Wales, equivalent to 1/4 of all cancers in women. Because the cause is unknown and risk factors cannot be controlled, a census is conducted and early diagnosis and treatment are conducted to reduce the mortality of breast cancer. The study of the health insurance plan showed that after 10 years of follow-up, the deaths of breast cancer in the screening group were significantly lower than those in the control group. 50-64-year-old woman dies