【摘要】 乳腺二级预防已被公认为是降低乳腺癌死亡率的有效途径。乳腺X线摄影是进行乳腺癌普查的主要手段,该方法不但有助于发现无临床体征的早期乳腺癌,而且可以藉其对乳腺实质的不同分型,判断其发生乳腺癌的不同潜在危险性,从而有助于明确须重点予以监视的普查对象,以提高普查效益。更多还原

【Abstract】 A classification of the risks in the development of breast cancer has been devised based solely on the appearance of the breast parenchyma on mammograms. Four paterns (Denseness, Transparency, Strip and Mix) of patients were defined. Each pattern can be subdivided into two or three sub-types. Therefore, ten types could be identified totally. A case-control study of 1000 breast cancers, each with two matching controls, was conducted to assess the role of this classification of breast parenchymal patterns as a breast cancer risk factor. Relative risks of 29.64 for type Ⅳc, 16.39 for type Ⅲc and 7.08 for type Ⅱb to lowest risk group were determined,更多还原