Fig. 19

a, b Contrast-enhanced CT shows an ill-defined mass in the periportal location (short, thin arrows) with associated rather marked thickening of the extrahepatic common duct (short, thick arrow). Extensive calcifications can be seen along the biliary radicals (black arrows). c Concurrent hypodense liver lesions either granulomas or cholangitic abscesses (dotted arrows). d Associated large retroperitoneal nodal mass (asterisk) is visualised