Epilepsy is a brain disorder that causes patients to have recurrent seizures. Developmental and epileptic encephalopathies—or DEEs – are a subgroup of seizure disorders which include Lennox-Gastaut syndrome, Dravet syndrome, tuberous sclerosis complex, and others. These conditions are both rare, and challenging to diagnose and treat effectively, and are often resistant to treatment. They most often begin in childhood and are associated with seizures of long duration and developmental delays.

On this site we invite you to explore more about the DEEs–how and why they occur, and which treatments are used to treat them. We have also provided patient support strategies with additional reading and resources to further your knowledge in this area. We invite you to explore our high-definition animations, apps, and other tools to further enhance your knowledge.