Hydrocephalus is primarily an excessive accumulation of fluid in the brain. This excess of cerebrospinal fluid accumulation causes the fluid spaces of the brain to enlarge causing pressure on the surrounding brain. The causes of hydrocephalus may be congenital, following a bleed into the brain (intraventricular hemorrhage), infections, malformations of the brain or even brain tumors in certain locations of the brain. The treatment options include endoscopic third ventriculostomy, cauterization of the choroid plexus, shunt placement. Learn more about Hydrocephalus.