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A further study on capillary-like bile ductules proliferation in chronic active hepatitis.

64 cases of chronic active hepatitis (CAH) and 84 cases of non-CAH liver diseases were studied with keratin stain. The capillary-like bile ductules (CLBD) were proliferating and their morphology was identical to that with Type V collagen stain reported before. CLBD proliferation were more marked in CAH than in other liver diseases, and it was considered to be one of the characteristics of CAH and could be used for differential diagnosis. The ultrastructure of CLBD was specific in morphology. The HBV-DNA in CLBD shown by the technique of in situ hybridization suggested that HBV might infect the cells of CLBD.