Jones T B, Dubuisson R L, Hughes J J, Robinson A E
J Ultrasound Med. 1983 Aug;2(8):345-8. doi: 10.7863/jum.1983.2.8.345.
Although contrast cholangiography has a greater accuracy than sonography in determining the precise nature of extrahepatic biliary obstruction, it is not without risk. High-resolution real-time sonography is frequently adequate to evaluate the extrahepatic biliary system in multiple planes without known risk to the patient. In a one-year period the authors prospectively observed eight instances of distal biliary obstruction with abrupt termination of the common bile duct, and all were associated with malignant obstruction. There was no instance of abrupt ductal termination secondary to benign disease in this series. Malignancy should be suspected when careful sonograms along the longitudinal axis of an obstructed distal common bile duct reveal an abrupt termination.
尽管在确定肝外胆管梗阻的确切性质方面，胆管造影术比超声检查具有更高的准确性，但它并非没有风险。高分辨率实时超声检查通常足以在多个平面上评估肝外胆管系统，且对患者没有已知风险。在一年的时间里，作者前瞻性地观察到8例胆总管突然中断的远端胆管梗阻病例，所有病例均与恶性梗阻有关。在这个系列中，没有一例是由良性疾病导致的导管突然中断。当沿着梗阻的远端胆总管纵轴仔细进行超声检查显示突然中断时，应怀疑为恶性肿瘤。
