1998年4月美国外科乳腺和肠道辅助项目负责人MFishar医生宣布，他们在历史上首次证明，乳腺癌不仅可以治疗，而且可以加以预防。一共有13388名具有患乳腺癌危险性的35岁以上的妇女参与了这项临床试验，她们被随机分成两组，一组每天服用抗雌激素药三苯氧胶，平均时间为4年；另 In April 1998, Dr. MFishar, head of the US Department of Surgical Mammary Gland and Intestinal Aids, announced that for the first time in history, they have demonstrated that breast cancer can not only be treated but also prevented. A total of 13,388 women over the age of 35 who were at risk of breast cancer participated in the clinical trial. They were randomly divided into two groups. One group took anti-estrogen triphenyl oxydant daily for an average of 4 years;