The term hydrocephalus is derived from two words: "hydro" meaning water, and "cephalus" referring to the head. Hydrocephalus is a condition in which excess cerebrospinal fluid (CSF) builds up within the ventricles (fluid-containing cavities) of the brain and may increase pressure within the head. Although hydrocephalus is often described as "water on the brain," the "water" is actually CSF, a clear fluid surrounding the brain and spinal cord. Symptoms include : headache, double vision, nausea/vomiting, irritability or drowsiness. The diagnosis is most commonly made on a CT or MRI of the brain. In those patients, where surgery is needed depending on the cause your doctor may offer you one of two treatment option.

Shunt Surgery:

The shunt surgery involves insertion of a drainage tube with a uni directional valve that drains the fluid into either the abdominal cavity or externally, thus relieving the pressure on the brain.

Endoscopic third ventriculostomy:
In certain patients the surgeon makes a small hole at the base of third ventricle to relieve the pressure of CSF within the lateral ventricles.