http://www.semanticweb.org/rjyy/ontologies/2015/5/ESSO#ILAE_1989_1_Localization-Related_Epilepsy

ILAE_1989_1_Localization-Related_Epilepsy

ILAE 1989 Epilepsies with partial or focal seizures (localization-related, partial or focal epilepsies) Localization-related epilepsies and syndromes are epileptic disorders in which seizure semiology or findings at investigation disclose a localized origin of the seizures. This includes not only patients with small circumscribed constant epileptogenic lesions (anatomic or functional), i.e., true focal epilepsies, but also patients with less well-defined lesions, whose seizures may originate from variable loci. In most symptomatic localization-related epilepsies, the epileptogenic lesions can be traced to one part of one cerebral hemisphere, but in idiopathic age-related epilepsies with focal seizures, corresponding regions of both hemispheres may be functionally involved.

http://www.semanticweb.org/rjyy/ontologies/2015/5/ESSO#ILAE_1989_Classification