Diagnostic Ultrasound - Abdomen and Pelvis

Cystic Pancreatic Lesion
Mucinous Cystic Neoplasm (MCN)
Mucinous Cystic Neoplasm (MCN)
(Left) Transverse
transabdominal ultrasound
shows a well-defined,
anechoic cystic lesion in
the body of the pancreas with
a few hyperechoic peripheral
foci ſt. (Right) Corresponding
axial CECT shows an
encapsulated oval, hypodense
mass in the body of the
pancreas with a thickened
enhancing cyst wall st. The
lesion contained internal
septations, not seen on CT.
Differential Diagnoses: Pancreas
Intraductal Papillary Mucinous Neoplasm
(IPMN)
Intraductal Papillary Mucinous Neoplasm
(IPMN)
(Left) Transverse
transabdominal color Doppler
ultrasound shows a collection
of multiple small, round and
oval cysts ſt within the body
of the pancreas. (Right) Axial
T2 HASTE MR in the same
patient better demonstrates
multifocal involvement of the
pancreas. Numerous T2-bright
cysts ſt are seen throughout
the pancreas, several of which
appear contiguous with a
dilated pancreatic duct st,
compatible with a mixed,
branch, and main duct IPMN.
Cystic Pancreatic Neuroendocrine Tumor
Cystic Pancreatic Neuroendocrine Tumor
(Left) Transverse
transabdominal ultrasound of
the pancreas shows a round,
well-circumscribed, cystic
lesion extending
exophytically from the neck of
the pancreas. This was
amenable to EUS-guided
biopsy, which showed a cystic
neuroendocrine tumor. (Right)
Axial CECT in a different
patient, shows a round cystic
lesion in the uncinate
process with a peripheral rim
of hypervascular
enhancement, a typical
appearance for a small cystic
neuroendocrine tumor.
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