乳腺癌居女性恶性肿瘤的第一位 ,每年全球约有 4 0万人死于该病[1] 。因此 ,重视乳腺癌癌前病变 ,及早治疗可降低乳腺癌的发生率及提高生存率。1　癌前病变的概念目前对于癌前病变的概念尚无统一认识。病理学认为 ,癌前病变系指出现于恶性肿瘤之前、形态学上出现某种程度的不典 Breast cancer ranks first among female malignancies, with about 40 million deaths each year worldwide [1]. Therefore, attention to breast cancer precancerous lesions, early treatment can reduce the incidence of breast cancer and improve survival. The concept of precancerous lesions Currently there is no uniform understanding of the concept of precancerous lesions. Pathology that precancerous lesions refers to the emergence of malignant tumors, morphologically some degree of atypical