Acquired hydrocephalus

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Normally occurs as a result of an illness or injury, for example after a brain tumour, after a stroke or after a traumatic brain injury.

Those health incidents can sometimes cause a blockage in the CSF absorption or the CSF circulation inside or around the brain and spinal cord, potentially creating an acquired or secondary hydrocephalus.

For instance, a tumor ingrowth could block one of the CSF pathways. A bleed forming clots inside the brain can block the sagittal sinuses, where CSF is normally absorbed, A trauma to the head can damage some of the structures responsible for CSF circulation and/or absorption.