| Summary: | Owing to the anatomic complexity of the hepatic hilum, it has been considered difficult to diagnose
and treat peri-hilar cholangiocarcinoma. Currently, imaging studies, including contrastenhanced
CT and MRI, play a crucial role in the detection, characterization, staging, and resectability
assessment of peri-hilar cholangiocarcinoma. In this review, the classification of perihilar
cholangiocarcinoma and proposed imaging protocol for the evaluation will be discussed.
The typical imaging finding of peri-hilar cholangiocarcinoma, evaluation of longitudinal tumor
extent, adjacent vascular invasion, and distant metastasis will also be mentioned. Finally, traditional
concepts and recent updates for the resectability assessment of peri-hilar cholangiocarcinoma
will be introduced.
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