2 - The etiological classification of epilepsy  pp. 21-23

The etiological classification of epilepsy

By Simon D. Shorvon

Chapter Abstract

In this introductory chapter, a classification of the etiology of epilepsy is proposed, and this forms the basis of the sectional divisions in the rest of the book. In constructing such a classification, it is necessary to take cognisance of five particular points: Definitions, Multifactorial cause of epilepsy, Cause versus mechanism, Focal versus generalized epilepsy and Flexibility. The chapter presents the definitions of the epilepsies which are divided into four main categories: Idiopathic epilepsy, Symptomatic epilepsy, Provoked epilepsy and Cryptogenic epilepsy. The ILAE Commission recommended that a classification should be a database forming the basis of a diagnostic manual; the etological schema in this chapter should be viewed as such for instance in relation to the benign focal epilepsies or even the idiopathic generalized epilepsies. It is clear that in the future, as further knowledge accrues, some of these epilepsies may be reclassified and revised.


Keywords:

ILAE Commission; cryptogenic epilepsy; idiopathic epilepsy; provoked epilepsy; symptomatic epilepsy;
Berg A , Berkovic S , Brodie M , et al. (2010) Revised terminology and concepts for organization of seizures and epilepsies: Report of the ILAE Commission on Classification and Terminology, 2005–2009. Epilepsia 51:676–85.
Commission on Classification and Terminology of the International League Against Epilepsy (1981) Proposal for revised clinical and electrographic classification of epileptic seizures. Epilepsia 22:489–501.
Commission on Classification and Terminology of the International League Against Epilepsy (1989) Proposal for revised classification of epilepsies and epileptic syndromes. Epilepsia 30:389–99.
Engel J (2001) A proposed diagnostic scheme for people with epileptic seizures and with epilepsy: Report of the ILAE Task Force on Classification and Terminology. Epilepsia 42:796–803.
Engel J (2006) Report of the ILAE Classification Core Group. Epilepsia 47:1558–68.
Gastaut H (1969) Clinical and electroencephalographical classification of epileptic seizures. Epilepsia 10(Suppl):2–13.
Luders HO , Burgess R , Noachtar S (1993) Expanding the international classification of seizures to provide localization information. Neurology 43:1650–5.
Shorvon S (2011) The etiological classification of epilepsy. Epilepsia 52 in press.