Intraductal malignant tumors in the liver mimicking cholangiocarcinoma: Imaging features for differential diagnosis

Despite remarkable recent improvements in the imaging tools for diagnosis of liver lesions, rare bile duct tumors are sometimes incorrectly diagnosed as cholangiocarcinoma or IPNB. To diagnose correctly and lead to proper treatment option, doctors should be familiar with the clinical manifestation and the imaging findings of rare bile duct tumors such as intraductal metastasis or intraductal growing HCC as well as more common tumors such as cholangiocarcinoma.