2. CLINICAL IMAGAGING
AN ATLAS OF DIFFERENTIAL DAIGNOSIS
EISENBERG
DR. Muhammad Bin Zulfiqar
PGR-FCPS III SIMS/SHL
3. • Fig GI 82-1 True epithelial cysts. Contrast CT scan shows
multiple unilocular cysts (arrows) scattered throughout
an otherwise healthy-looking pancreas in this patient
with von Hippel-Lindau disease.167
4. • Fig GI 82-2 Pseudocyst. (A) Axial contrast CT
scan demonstrate a well-defined unilocular
cyst (arrow) in the tail of the pancreas. (B) T2-
weighted MR image shows the cyst (arrow)
with homogeneously bright signal intensity, a
finding that confirms that the lesion of a fluid-
filled unilocular structure.167
5. • Fig GI 82-3 Multiple pancreatic pseudocysts.
CT scan after the administration of contrast
material demonstrates four sharply
marginated, fluid-filled collections.
6. • Fig GI 82-4 Hemorrhagic pseudocyst. Contrast CT
scan shows a cystic mass containing an area of
high attenuation (arrow), a finding consistent
with recent hemorrhage.168
7. • Fig GI 82-5 Ectopic pancreatic pseudocyst. The
low-attenuation pseudocyst (PC) lies in the
superior recess of the lesser sac posterior to the
stomach (S). Note the dilated intrahepatic bile
ducts (arrow).
8. • Fig GI 82-6 Serous cystadenoma. (A) CT scan
shows a lobulated mass (arrow) of the
pancreatic head with typical central scar
(arrowhead) and lack of vascular encasement.
(B) T2-weighted MR image shows the internal
morphological features of the cyst, with high-
signal-intensity microcysts (arrows) that are
clearly distinguished from the dark central
scar (arrowhead).167
9. • Fig GI 82-7 Mucinous cystic neoplasm. A contrast
CT scan shows a large cystic mass (arrows) with
internal septa in the head of the pancreas. The
peripheral and septal calcification (arrowheads)
indicate the malignant nature of the lesion. (B) In
another patient, a contrast scan demonstrates a
well-circumscribed, 18-cm palpable mass within
the tail of the pancreas. There is enhancement on
the thin external septa and peripheral wall.164
10. • Fig GI 82-8 Intraductal IPMN. (A) Contrast CT
scan shows a small cyst (arrow) in the head of
the pancreas. (B) Coronal oblique MRCP
shows communication between the cyst
(arrow) and the main pancreatic duct
(arrowheads), a finding that helped establish
the diagnosis.167
11. • Fig GI 82-9 Islet cell tumor. CT scan in a patient
with a malignant primary neuroendocrine
tumor of the pancreas demonstrates a cystic
lesion in the pancreatic body with peripheral
mural nodules (arrows).167
12. • Fig GI 82-10 Pseudopapillary tumor. Contrast
CT scan shows a lesion in the body of the
pancreas with cystic areas and a solid
component or mural nodule (arrow).167
13. Fig GI 82-11 Pancreatic carcinoma. CT scan shows a solid tumor
with cystic degeneration (arrow).167
14. • Fig GI 82-12 Malignant IPMN. CT scan
demonstrates a multiseptated cyst with solid
components (arrow).167
15. • Fig GI 82-13 Pancreatic abscess. CT scan shows a
heterogeneous fluid collection with low attenuation
and irregular margins in the body and tail of the
pancreas. Note the high-attenuation debris (arrow)
within the lesion.168