Hydrocephalus refers to a build-up of fluid inside the skull, leading to brain swelling. Hydrocephalus means "water on the brain."
Normal pressure hydrocephalus (NPH) is a rise in cerebrospinal fluid (CSF) in the brain that affects brain function. However, the pressure of the fluid is usually normal.
Hydrocephalus - idiopathic; Hydrocephalus - adult; Hydrocephalus - communicating; Extraventricular obstructive hydrocephalus
Causes, incidence, and risk factors
Normal pressure hydrocephalus (NPH) is a form of
NPH can occur without a known cause, or it may be caused by any condition that blocks the flow of cerebrospinal fluid (CSF). The fluid-filled chambers (ventricles) of the brain enlarge to fit the increased volume of CSF. They press down on and damage or destroy brain tissue.
Risk factors include:
- Bleeding from a blood vessel or
aneurysmin the brain ( subarachnoid hemorrhage)
- Closed head injury
Meningitisor similar infections
- Surgery on the brain (
CSF is produced in normal amounts in these conditions, but it is prevented from being reabsorbed normally.
NPH is thought to account for about 5% of all