Aqueductal stenosis
Diagnosis probable
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Findings
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Non contrast-contrast CT of the brain demonstrates marked hydrocephalus involving the lateral and third ventricles but sparing the fourth ventricle. The floor of the third ventricle is ballooned outwards (downward) and there is funnelling of the superior part of the aqueduct. The anterior fontanellfontanelle is gaping.
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Answer
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Extrinsic compression: tectal plate glioma; pineal tumour; posterior fossa tumour; cerebral vascular malformation. Intrinsic stenosis / obstruction/obstruction: previous infection (meningitis / ventriculitis/ventriculitis); subarachnoid haemorrhage (SAH).
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What may you see when examining the child's eyes?
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