We propose to study children with recent onset partial epilepsy, cryptogenic infantile spasms, and idiopathic Lennox-Gastaut Syndrome with serial FDG-PET to elucidate the natural history and evolution of metabolic abnormalities associated with such epilepsies. The severity of the seizure disorder, and cognitive impairment, when present, will be correlated with the presence and extent of focal and global cerebral metabolic abnormalities.
INCLUSION CRITERIA: Patients with partial seizures, infantile spasms and Lennox-Gastaut syndrome will be selected. EXCLUSION CRITERIA: Evidence of a structural lesion as cause for epilepsy. Degenerative or metabolic disease. Inability to comply with the protocol.