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对５７例先天性胆总管囊肿的囊壁病理切片进行了回顾性观察，其中１２例做了胶原纤维、弹力纤维及网织纤维染色，发现囊肿越大，囊壁越厚，囊壁内胶原纤维、弹力纤维和网织纤维越多。胆总管远端梗阴和胰胆管合流异常均不能完全解释胆总管囊肿的成因，认为囊肿型胆总管囊肿是在胚胎发育中胆管上皮过度异常增生而形成的先天性囊性扩张．
57 cases of congenital choledochal cyst pathological sections were retrospectively reviewed, of which 12 cases of collagen fibers, elastic fibers and reticular fibers staining and found that the larger the cyst, the thicker the wall, the wall of collagen fibers , The more elastic fibers and reticular fibers. Common distal common bile duct and pancreaticobiliary duct anomalies can not fully explain the cause of choledochal cyst, that cystic cholangiocarcinoma in the embryonic development of bile duct epithelial hyperplasia and the formation of congenital cystic dilatation.