Hydrocephalus is a condition in which too much fluid builds up in the brain. The fluid collects in cavities called ventricles. The fluid is cerebrospinal fluid (CSF), a clear liquid that normally surrounds both the spinal cord and the brain.
Hydrocephalus occurs when:
- An excess of CSF is produced (rare)
- A blockage that doesn't allow CSF to drain properly (more commonly)
Hydrocephalus can be:
- Congenital—You are born with the condition.
- Acquired—You suffer an injury or an illness that causes the condition to develop.
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