CLINICAL IMAGAGINGAN ATLAS OF DIFFERENTIAL DAIGNOSISEISENBERG

1. 12Cerebellar Masses on
Computed Tomography

2. CLINICAL IMAGAGING
AN ATLAS OF DIFFERENTIAL DAIGNOSIS
EISENBERG
DR. Muhammad Bin Zulfiqar
PGR-FCPS III SIMS/SHL

3. • Fig SK 12-1 Cystic astrocytoma. The cystic
posterior fossa lesion (open arrows) contains a
central nodular area of enhancement (closed
arrow).

4. • Fig SK 12-2 Medulloblastoma. (A) Noncontrast
scan in an 8-year-old girl shows the tumor as a
mixed high-density (H) and medium-density (M)
mass in the posterior fossa. (B) After the
intravenous injection of contrast material, there
was marked enhancement of the tumor (T). The
arrows point to the dilated temporal horns
representing hydrocephalus.

5. • Fig SK 12-3 Hemangioblastoma in von Hippel-
Lindau syndrome. (A) CT scan shows a cystic
lesion (open arrows) with an enhancing nodule
(closed arrow) in the left cerebellar hemisphere.
(B) Vertebral arteriogram shows the vascular
nodule (solid arrow) of the tumor with multiple
feeding arteries (black arrowheads) and a large
draining vein (open arrow).

6. • Fig SK 12-4 Cerebellar sarcoma. (A) Noncontrast scan
shows dense tumor (straight arrows) in the left
cerebellar hemisphere. Note the cystic region (open
curved arrow) within it. (B) After intravenous contrast
infusion, the tumor is notably enhanced (straight
arrows). The fourth ventricle is displaced severely from
left to right (open curved arrow), causing
noncommunicating hydrocephalus.1

7. • Fig SK 12-5 Metastasis. Ring-enhancing lesion
with surrounding edema.

8. • Fig SK 12-6 Right cerebellar infarction. The low-
attenuation process (arrows) has well-defined
margins consistent with chronic infarction.1

9. • Fig SK 12-7 Cerebellar hemorrhage. There is a
well-circumscribed, high-attenuation mass.

10. • Fig SK 12-8 Arteriovenous malformation. Irregular
mass of increased attenuation in the vermis
(arrow). Note the dilated vein (arrowheads)
draining the lesion.