Fact-sheet: Aqueductal stenosis
Updated on 03/26/2020 at 1:32 PM
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Definition
Stenosis of the mesencephalic aqueduct.
- Congenital forms (extensive stenosis associated with other malformations)
- Acquired stenoses are often secondary to meningitis, subarachnoid hemorrhage, or a brainstem tumor +++
Clinical features
Presentation with intracranial hypertension, impaired consciousness, and oculomotor signs.
Decompensation of congenital forms may occur in adulthood.
CT
Triventricular dilatation with transependymal resorption.
The causative lesion may be visible.
MRI
T2: hyposignal.
Dilatation of the third ventricle with transependymal resorption.
3D sequence for flow assessment: qualitative analysis of CSF flow.
Management
Neurosurgical treatment by endoscopic third ventriculocisternostomy.