CLINICAL IMAGAGINGAN ATLAS OF DIFFERENTIAL DAIGNOSISEISENBERG

1. 21Enhancing Ventricular
Margins on Computed
Tomography

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

3. • Fig SK 21-1 Meningeal carcinomatosis.
Generalized enhancement of the meninges
with obstruc tive hydrocephalus

4. • Fig SK 21-2 Histiocytic lymphoma.
Homogeneously enhancing lesions (arrows)
deep in the brain associated with
enhancement of ventricular margins.

5. • Fig SK 21-3 Subependymal metastases.
Multiple enhancing ependymal nodules
(arrows) in a patient with posterior fossa
ependymoblastoma and hydrocephalus.1

6. • Fig SK 21-4 Brain abscess with ventriculitis. CT scan following the
intravenous injection of contrast material in a drug addict with lethargy
and confusion demonstrates enhancement of the ventricular system
(white arrowheads) due to extensive spread of infection. Note the ring-
enhancing abscess (black arrowheads) in the right occipital lobe.

7. • Fig SK 21-5 Pneumococcal meningitis. (A) Noncontrast scan
shows dilatation of the temporal horns of the lateral
ventricles (arrowheads). (B) After the intravenous injection
of contrast material, there is enhancement of the meninges
in the basal cisterns (arrowheads), reflecting the underlying
inflammation due to meningitis. The hydrocephalus in
meningitis is due to blockage of the normal flow of
cerebrospinal fluid by inflammatory exudate at the level of
the aqueduct and the basal cisterns.