Q. Imaging indicators of intraventricular obstructive (noncommunicating)
hydrocephalus are all except
a. dilatation of the temporal horns disproportionate to lateral ventricular dilatation
b.enlargement of the anterior and posterior recesses of the third ventricle
c.dilatation of the sulcal spaces, major fissures and basal cisterns
d.inferior convexity of the floor of the third ventricle
e.transependymal oedema and bulging of fontanelles
ANS.---c
The sulcal spaces, major fissures and basal cisterns are small or obliterated in intraventricular obstructive (noncommunicating) hydrocephalus.
Other features, such as changes in the configuration of the frontal horns of the lateral ventricles, specifically widening of the radius of the frontal horn, and a decrease in the angle it makes with the midline plane, are less useful. Further features classically described in chronic hydrocephalus, such as erosion of the dorsum sellae and copper beaten skull, are even less reliable.
a. dilatation of the temporal horns disproportionate to lateral ventricular dilatation
b.enlargement of the anterior and posterior recesses of the third ventricle
c.dilatation of the sulcal spaces, major fissures and basal cisterns
d.inferior convexity of the floor of the third ventricle
e.transependymal oedema and bulging of fontanelles
ANS.---c
The sulcal spaces, major fissures and basal cisterns are small or obliterated in intraventricular obstructive (noncommunicating) hydrocephalus.
Other features, such as changes in the configuration of the frontal horns of the lateral ventricles, specifically widening of the radius of the frontal horn, and a decrease in the angle it makes with the midline plane, are less useful. Further features classically described in chronic hydrocephalus, such as erosion of the dorsum sellae and copper beaten skull, are even less reliable.
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