Diagnostic Ultrasound - Abdomen and Pelvis

Choledochal Cyst
(Left) Longitudinal
transabdominal ultrasound
shows marked fusiform
dilatation of the extrahepatic
bile duct ſt in this patient
with type I choledochal cyst.
(Right) Transverse grayscale
ultrasound in the same patient
shows the markedly dilated
common duct ſt, which has a
cystic appearance in the
hepatic hilum. The gallbladder
(GB) is anterior and
separate from the choledochal
cyst (type I).
Diagnoses: Biliary System
(Left) Contrast-enhanced
coronal CT in the same patient
shows marked fusiform
dilatation of the common duct
communicating with
intrahepatic ducts ,
consistent with type I
choledochal cyst. (Right)
Longitudinal oblique grayscale
ultrasound of the porta
hepatis shows a
multilobulated common duct
with 2 distinct lobulations
consistent with a type IVb
choledochal cyst. (Courtesy S.
Bhatt, MBBS.)
(Left) Grayscale ultrasound
shows marked fusiform
dilatation of the common bile
duct ſt consistent with a type
1 choledochal cyst. (Right)
MRCP in the same patient
confirms the marked
dilatation of the common duct
ſt with secondary mild
dilatation of the intrahepatic
duct , consistent with a
type 1 choledochal cyst. Note
the common channel of the
pancreas and common duct
with an anomalous
pancreatobiliary union st.
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