乳腺导管内癌在乳腺癌中少见，临床症状隐匿，漏误诊率较高。自1979年至1994年经手术治疗19例，本文重点对早诊方法与术式进行讨论。1临床资料本组19例均为女性，年龄32～73岁，平均44．5岁，病史20天～5年，平均11．8个月。首发症状为乳房肿块12例（63．2％），直径在0．5～5c Breast ductal carcinoma is rare in breast cancer, clinical symptoms are hidden, and misdiagnosis rate is high. From 19 to 1979, 19 cases were treated surgically. This article focuses on the discussion of early diagnosis and surgical procedures. 1 Clinical data 19 patients in this group were all women, aged 32 to 73 years, mean 44.5 years, history of 20 days to 5 years, an average of 11.8 months. The first symptom was breast lumps in 12 cases (63.2%) and diameters in 0.5 to 5c