Rasmussen syndrome is a form of childhood epilepsy that causes frequent, severe seizures. The seizures damage one side (hemisphere) of the brain, often resulting in gradual loss of movement and sensation on one side of the body, problems with mental development, partial loss of vision in one eye, and speech and language problems.
Drug therapy is almost never successful in treating Rasmussen syndrome. For some children with the condition, though, a type of brain surgery called hemispherectomy can prevent seizures and improve some of the problems that may occur with the epilepsy.
WebMD Medical Reference from Healthwise