Diagnostic Ultrasound - Abdomen and Pelvis

Pancreatic Duct Dilatation
Chronic Pancreatitis
Chronic Pancreatitis
(Left) Transverse
transabdominal ultrasound
shows a dilated pancreatic
duct ſt communicating with a
small pseudocyst st in the
body of the pancreas. (Right)
Axial T2 HASTE MR better
demonstrates mild pancreatic
ductal dilatation ſt
communicating with the small
pseudocyst st. Note tiny
dilated side branches in the
tail of the pancreas.
Pancreatic duct strictures
were also seen (not shown) in
this patient with a history of
pancreatitis.
Differential Diagnoses: Pancreas
Pancreatic Ductal Carcinoma
Pancreatic Ductal Carcinoma
(Left) Transverse oblique
transabdominal ultrasound
shows pancreatic ductal
dilation in the body of the
pancreas ſt. (Right) Coronal
CECT was performed in the
same patient to further
characterize the cause of the
pancreatic ductal dilatation.
The dilated duct terminates
abruptly ſt at the site of a
large, ill-defined mass in the
pancreatic head .
Intraductal Papillary Mucinous Neoplasm
(IPMN)
Intraductal Papillary Mucinous Neoplasm
(IPMN)
(Left) Transverse
transabdominal ultrasound
shows marked pancreatic
ductal dilatation ſt with lowlevel
internal echoes and an
ill-defined hypoechoic mass
posteriorly st. (Right) Axial
CECT demonstrates marked
pancreatic ductal dilatation
ſt with an infiltrative soft
tissue mass posteriorly ,
encasing the celiac axis. Note
cavernous transformation of
the portal vein st due to
venous occlusion from the
mass which was proven by
biopsy to be malignant
transformation of a main duct
type IPMN.
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