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《Chinese Journal of Breast Disease(Electronic Edition)》 2011-05
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Preliminary study of female mammary duct casting anatomy

LIU Ning,WANG Ke-ren,YAO Shu-ren,CUI Li,LIU Yan-hong,XU Zhe-li.Department of Breast Surgery,China-Japan Union Hospital of Jilin University,Changchun 130033,China  
ObjectiveTo study the anatomy of female mammary duct system using casting technique.MethodsCasting method was used to make cast specimens of female mammary ducts from 11 adult women's breast specimens.The cast specimens were observed and measured.ResultsThe whole mammary duct system showed a well-distributed tree branches,and the tube diameter between the adjacent branches appeared a flat transition.The tube diameter of the bifurcation was slightly swollen.The ductuslactiferi was the first grade,including 14 to 19 branches.The 2-branch type was the dominating type,and there was an also 6-branch type.The branch ducts and higher grade ducts on a spindle extension at an angle less than 90 degrees accounted for 96.4%(106/110),and between 40 degrees and 70 degrees accounted for 81.8%(90/110).There is no connection phenomenon between duct branches.The mean diameters of the fourth,fifth and sixth grade ducts were(7.3±0.6)×10-1,(6.1±0.7)×10-1 and(4.3±0.7)×10-1 mm,respectively.The electron microscope scanning found that the terminal small duct wall was smooth,most ducts were blind,and most alveoli were atrophic and disappeared,still some terminal ducts were connected with the alveoli.Each alveolus showed a cyst form,with smooth surface.ConclusionThe cast mould of mammary duct system creates conditions for studying the anatomical structure of mammary duct system,which provides objective data for safe application of fiberoptic ductoscopy in clinic,and anatomy evidence for nipple discharge development.
【CateGory Index】: R655.8
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