World J Gastroenterol. 2011 Sep 14;17(34):3864-9. doi: 10.3748/wjg.v17.i34.3864.
Cholangioscopy remains another modality in the investigation of biliary strictures. At cholangioscopy, the "tumour vessel" sign is considered a specific sign for malignancy. Through its ability to not only visualise mucosa, but to take targeted biopsies, it has a greater accuracy, sensitivity and specificity for malignant strictures than endoscopic retrograde cholangiopancreatography guided cytopathological acquisition. Cholangioscopy however, is time consuming and costly, requires greater technical expertise, and should be reserved for the investigation of undifferentiated strictures after standard investigations have failed.
胆管镜检查仍然是胆道狭窄检查的另一种方法。在胆管镜检查中，“肿瘤血管”征被认为是恶性肿瘤的特异性征象。与内镜逆行胰胆管造影引导下的细胞学采集相比，它不仅能够观察黏膜，还能够进行靶向活检，因此对恶性狭窄具有更高的准确性、灵敏度和特异性。然而，胆管镜检查耗时且昂贵，需要更高的技术专长，应保留用于标准检查失败后对未分化狭窄的检查。
