Diagnostic Ultrasound - Abdomen and Pelvis

Cholangiocarcinoma
(Left) Ultrasound in a different
patient shows marked
intrahepatic biliary ductal
dilatation st caused by an
extrahepatic common bile
duct cholangiocarcinoma (not
shown in this image). (Right)
Longitudinal view of the
common bile duct in the same
patient shows the obstructing
cholangiocarcinoma causes
proximal marked biliary ductal
dilatation .
Diagnoses: Biliary System
(Left) Axial CECT shows a
hypodense
cholangiocarcinoma at the
hepatic hilar level invading
liver parenchyma with
marked intrahepatic duct
dilatation st in right and left
lobes. Note gastric/splenic
varices caused by portal
vein obliteration (not shown)
by the tumor. (Right) Coronal
CT in the same patient shows
a cholangiocarcinoma at the
hepatic hilum with marked
intrahepatic duct dilatation
st. Note collateral vessels at
the porta hepatis caused
by portal vein obliteration.
(Left) Axial contrast-enhanced
MR shows a
cholangiocarcinoma that
appears as an ill-defined
isointense soft tissue mass
near the hepatic hilum.
Dilatated intrahepatic ducts
in segment 4 abruptly
terminate at the level of the
mass. (Right) Delayed phase
contrast-enhanced MR in the
same patient shows the
cholangiocarcinoma to
better advantage due to
retention of contrast, which
causes the tumor to appear
slightly hyperintense
compared to background liver
parenchyma.
337