Epidemiologic data concerning idiopathic generalized epilepsies (IGEs) are scarce or often unreliable. In the current study, we specifically analyzed the syndromes of IGE based on their demographic, clinical, and EEG findings to determine if other than the seizure type(s) and age of onset, there are any other distinctive features to distinguish these syndromes of IGEs from one another.
Materials and methods
In this retrospective study, all patients with a clinical diagnosis of IGE were recruited at the outpatient epilepsy clinic at Shiraz University of Medical Sciences, from 2008 to 2011. Demographic variables and relevant clinical and EEG variables were summarized descriptively. Statistical analyses were performed using Chi square and Fisher's exact tests.
2190 patients with epilepsy were registered at our epilepsy clinic and 442 patients (20.2%) were diagnosed as having IGE. Age of seizure onset was 12±7 years. Juvenile myoclonic epilepsy was the most frequent syndrome, followed by epilepsy with generalized tonic–clonic seizures only and juvenile absence epilepsy. Epilepsy risk factors, physical examination, MRI and even EEG could not differentiate various syndromes of IGE.
The key element in making the correct diagnosis of an IGE syndrome is obtaining a detailed clinical history. However, other than the seizure type(s) and age of onset, there are no any other distinctive features to distinguish these syndromes of IGEs from one another. Besides, sometimes these syndromes have overlapping features.
To read this article in full you will need to make a payment
Purchase one-time access:Academic & Personal: 24 hour online accessCorporate R&D Professionals: 24 hour online access
One-time access price info
- For academic or personal research use, select 'Academic and Personal'
- For corporate R&D use, select 'Corporate R&D Professionals'
Subscribe:Subscribe to Journal of the Neurological Sciences
Already a print subscriber? Claim online access
Already an online subscriber? Sign in
Register: Create an account
Institutional Access: Sign in to ScienceDirect
- Glossary of descriptive terminology for ictal semiology: report of the ILAE task force on classification and terminology.Epilepsia. 2001; 42: 1212-1218
- A proposed diagnostic scheme for people with epileptic seizures and epilepsy: report of the ILAE task force on classification and terminology.Epilepsia. 2001; 42: 796-803
- Report of the ILAE classification core group.Epilepsia. 2006; 47: 1558-1568
- Idiopathic generalized epilepsies recognized by the International League Against Epilepsy.Epilepsia. 2005; 46: 48-56
- Syndromes of idiopathic generalized epilepsies not recognized by the International League Against Epilepsy.Epilepsia. 2005; 46: 57-66
- Epidemiology of idiopathic generalized epilepsies.Epilepsia. 2005; 46: 10-14
- Epidemiology of epilepsy in developing countries.Bull World Health Organ. 1993; 71: 247-258
- Genetics of idiopathic generalized epilepsies.Epilepsia. 2005; 46: 15-20
- Epilepsy and consanguinity in Shiraz, Iran.Eur J Paediatr Neurol. 2005; 9: 383-386
- Childhood absence epilepsy and febrile seizures: a family with a GABA (A) receptor mutation.Brain. 2003; 126: 230-240
- MRI reveals structural abnormalities in patients with idiopathic generalized epilepsy.Neurology. 2006; 67: 848-852
- Idiopathic generalized epilepsies.in: Panayiotopoulos C.P. The epilepsies: seizures, syndromes and management. Bladon Medical Publishing, Oxford2005: 271-348
- EEG features in idiopathic generalized epilepsy: clues to diagnosis.Epilepsia. 2006; 47: 523-528
- EEG in adult-onset idiopathic generalized epilepsy.Epilepsia. 2003; 44: 252-256
- Age of onset in idiopathic (genetic) generalized epilepsies: clinical and EEG findings in various age groups.Seizure. 2012; 12: 417-421
- Photosensitivity in idiopathic generalized epilepsies.Epilepsia. 2005; 46: 1426-1441
- Effects of antiepileptic drugs on electroencephalographic findings in patients with idiopathic generalized epilepsies.Iran J Child Neurol. 2011; 5: 33-36
Published online: November 12, 2012
Accepted: October 22, 2012
Received in revised form: October 18, 2012
Received: September 23, 2012
© 2012 Elsevier B.V. Published by Elsevier Inc. All rights reserved.