Lennox-Gastaut syndrome
Lennox-Gastaut syndrome is a severe epilepsy syndrome with seizures usually beginning before the age of 4. The syndrome has many kinds of seizures and most of the children with Lennox-Gastaut syndrome will display cognitive and behavioural problems. The aetiologies to Lennox-Gastaut syndromes are many: brain malformations, perinatal asphyxia, brain damage, CNS-infection, or congenital degenerative/metabolic conditions. For more than 30% of the cases the aetiology cannot be determined. In collaboration with colleagues in Marseille the natural development  of the condition will be investigated by follow-ups on adults previously diagnosed with the syndrome. A prospective investigation will be made with participants  with either newly diagnosed Lennox-Gastaut or already known patients in need of alteration of medication.