abrupt cut-off and separation of bile duct on cholangiogram are useful differential diagnostic markers for benign and malignant bile duct strictures without demonstrable mass on US or CT.

A percutaneous transhepatic cholangiogram ... If your bile duct is blocked your doctor may put a drain or stent in so the bile can drain. Your doctor puts a needle through the skin of your tummy ...

[35] In our study, the differential diagnostic markers of cholangiogram between benign and malignant bile duct strictures included ... Even if a hepatic mass is not visible, most ...