Conclusion Breast-duct endoscopy is a very important and new method to diagnose early stage of mammary gland carcinoma,and will be of great influence in its treatment.

• 结论乳管内窥镜检查乳腺病是一种崭新的诊断方法，对早期乳腺癌诊断有重要的作用，将对乳腺癌的治疗产生深远影响。