csf

Question 1

Answer 1

congenital aqueduct stenosis

Question 2

Answer 2

aqueduct stenosisdue to webs

Question 3

Answer 3

colloid cyst

most occur at foramen of Monro

Question 4

Answer 4

chordoid glioma of the third ventricle

***NOT at the foramen of Monro (like a colloid cyst)

Question 5

Answer 5

Marked obstructive hydrocephalus due to fourth ventricular outlet obstruction by fine septations

Question 6

Answer 6

dandy walker malformation

This case illustrates a classic Dandy Walker malformation with associated aqueduct stenosis and obstructive hydrocephalus, a common associated feature

(although not part of the Dandy walker triad:

1. hypoplasia of the vermis with cephalad rotation of the torcula,
2. cystic dilatation of the fourth ventricle,
3. enlarged posterior fossa )

Question 7

Answer 7

NPH

• widening of the temporal horns of the lateral ventricles >6 mm
• acute callosal angle
• dilated Sylvian fissures
• tight high convexity (narrow sulci and subarachnoid spaces at the vertex and medial/parafalcine region)

Question 8

Answer 8

choroid plexus papilloma.

Usually the ventricular system is dilated as a result of an increased production of CSF (“overproduction hydrocephalus”).

A lobulated hyperdense soft tissue mass with a “cauliflower-like” appearance in the trigone of the left lateral ventricle with intense contrast enhancement. The ventricular system is enlarged.

Question 9

Answer 9

intracranial hypotension