What Is Hydrocephalus?
Hydrocephalus (sometimes called “water on the brain”) occurs when too much cerebrospinal fluid (CSF) builds up in the spaces in the brain called ventricles. This buildup causes the head to enlarge and can increase pressure inside the head and on the brain. Without treatment, hydrocephalus can cause damage to the brain or become life-threatening.
There are two types of hydrocephalus:
- Congenital hydrocephalus develops before birth. Roughly two of every 1,000 infants are born with hydrocephalus.
- Acquired hydrocephalus develops after birth.