The entire extrahepatic bile duct can not be visualized in all cases.

结果:所有的患儿均未见到完整的肝外胆道.

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NAS were most prevalent in the extrahepatic bile duct.

结果:NAS常发生在肝外胆管.

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Objective To study the value of ultrasound diagnosis of the carcinoma of extrahepatic bile duct.

目的评价超声对肝外胆管癌的诊断价值.

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Objective To improve the detection rate of extrahepatic bile duct obstructive diseases by ultrasonography.

摘要目的提高肝外胆管梗阻性病变的超声显示率.

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