A SHUNT is a type of surgical implant used to divert fluid away from an area of the body. It is commonly used to treat hydrocephalus, a condition in which there is an abnormal accumulation of cerebrospinal fluid in the brain. A SHUNT is inserted into the brain and connected to a vein or other body cavity, allowing the excess fluid to be drained away. Shunts can also be used to treat other conditions such as hydrocephalus, cysts, and tumors.