Lennox-Gastaut syndrome (LGS) is a rare and severe kind of epilepsy that starts in childhood. Children with LGS have seizures often, and they have several different kinds of seizures. Lennox-Gastaut syndrome is a severe form of epilepsy seen in children. It’s difficult to treat and often causes permanent brain damage and learning difficulties. On this site, you will find useful information and resources about Lennox-Gastaut Syndrome – and most importantly, a community of support. NOTE Lennox-Gastaut syndrome is a syndrome with developmental and epileptic encephalopathy. CAUTION As Lennox-Gastaut syndrome evolves from a prior epilepsy syndrome/etiology in many cases, repeat screening for this syndrome during the susceptible age period is important. Understanding seizures with LGS Seizures are a defining feature of LGS. A seizure is a sudden, uncontrolled electrical disturbance in the brain that may cause changes in your loved one’s behavior, movements, and levels of consciousness. The International League Against Epilepsy (ILAE) Diagnostic Manual's goal is to assist clinicians who look after people with epilepsy to diagnose the epilepsy syndrome and (if possible) the etiology of the epilepsy. Arriving at the correct epilepsy syndrome and/or etiology allows better decision-making about treatment and improves patient care. Seizure Types Seen in LGS We at the LGS Foundation believe it is important for families living with LGS to be able to recognize different seizure types, however, there is a lack of detailed, accurate information on the internet as to what seizure types may look like. This is what brought us to create this video library of what seizures may look like. Thank you to the families who shared these. Lennox–Gastaut syndrome (LGS) is a complex, rare, and severe childhood-onset epilepsy syndrome. It is characterized by multiple and concurrent seizure types, including tonic seizure, cognitive dysfunction, and slow spike waves on electroencephalogram (EEG), which are very abnormal. [1] Typically, it presents in children aged 3–5 years and most of the time persists into adulthood with. What is Lennox-Gastaut syndrome? The Lennox-Gastaut syndrome (LGS) is a type of epilepsy with multiple different types of seizures, particularly tonic (stiffening) and atonic (drop) seizures. Intellectual development is usually delayed and often worsens over time. Lennox-Gastaut syndrome is a severe form of epilepsy. Seizures begin in early childhood, usually before the age of 4 years. Children, adolescents, and adults with Lennox-Gastaut syndrome have multiple types of seizures that vary among individuals.