Cholangiocarcinomas are cancers arising from bile ducts, either found within the liver (intrahepatic) or outside the liver (extrahepatic). In Western countries, deaths due to intrahepatic cancers are rising at a higher rate than deaths due to extrahepatic cancers. This may be due to rising cases of liver disease and misclassification of the different cancer types.

中文翻译：

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西方国家胆管癌流行病学现状

胆管癌是由胆管引起的癌症，发现于肝内（肝内）或肝外（肝外）。在西方国家，肝内癌死亡率的上升速度高于肝外癌死亡率。这可能是由于肝病病例的增加和不同癌症类型的错误分类。