RT Book, Section A1 Coorg, Rohini A2 Kline, Mark W. SR Print(0) ID 1182923354 T1 Etiologies of Epilepsy T2 Rudolph's Pediatrics, 23e YR 2018 FD 2018 PB McGraw-Hill Education PP New York, NY SN 9781259588594 LK accesspediatrics.mhmedical.com/content.aspx?aid=1182923354 RD 2024/04/18 AB Epilepsy is not a single disease. Epilepsy may represent a primary disorder, often with an identified genetic cause, or it may be a symptom or result of another disease. Understanding the etiology of a patient’s epilepsy has important implications for management and prognosis. In 1989, the International League Against Epilepsy (ILAE) classified etiologies of epilepsy into 3 main categories: symptomatic, cryptogenic, and idiopathic. In 2010, the ILAE reorganized the epilepsies into having a structural/metabolic (previously “symptomatic”), unknown (previously “cryptogenic”), or genetic (previously “idiopathic”) cause. The ILAE classification systems of epilepsy are discussed in more detail in Chapter 549.