7.Cholangiocarcinomas do not make bile, but the cells do make mucin, and they can be almost impossible to distinguish from metastatic adenocarcinoma on biopsy or fine needle aspirate.

• 胆管癌不产生胆汁，但这些细胞生成粘蛋白，并很难与活检或针吸标本的转移性腺癌相区分。