Non-tumors disease 31 cases including mammary ductal ectasia 11 cases,mammary ductal mastitis 2 cases and mammary ductal ectasia with chronic mastitis 18 cases.

• 非肿瘤性病变31例，占55.；36%25，其中单纯导管扩张症11例，导管扩张伴慢性乳腺炎18例，单纯导管炎症2例；