Objective To study the mucous histochemical characteristics and the immunohistochemical expression of cytokeratin (CK),carcinoembryonic antigen (CEA) and epithelial membrane antigen (EMA) in extrahepatic biliary carcinoma(EBC).

• 目的研究肝外胆管癌粘液组化特性和CK、CEA和EMA的免疫表达。