What is this article about?
Hydrocephalus is a condition in the brain in which there is an accumulation of cerebrospinal fluid (CSF) in the ventricles, increasing the intracranial pressure within the skull. Hydrocephalus can be caused by a variety of different diseases and injuries, including those that cause disruptions to the absorption of CSF or an obstruction to the CSF flow. There are different treatments available for those with hydrocephalus depending on the individual, but they often involve the insertion of a shunt. In the United States alone, 33 000 people have shunts placed every year.