Stereoelectroencephalography (SEEG) and epilepsy surgery in posttraumatic epilepsy: A multicenter retrospective study.
Epilepsy Behav
; 112: 107378, 2020 11.
Article
in En
| MEDLINE
| ID: mdl-32835959
ABSTRACT
PURPOSE:
Posttraumatic epilepsy (PTE) is a common cause of drug-resistant epilepsy, especially in young adults. Nevertheless, such patients are not common candidates for intracranial presurgical evaluation. We investigated the role of stereoelectroencephalography (SEEG) in defining epileptogenicity and surgical strategy in patients with PTE.METHODS:
We analyzed ictal SEEG recordings from 18 patients. We determined the seizure onset zone (SOZ) by quantifying the epileptogenicity of the sampled structures, using the "epileptogenicity index" (EI). We also identified seizure onset patterns (SOPs) through visual and frequency analysis. Postsurgical outcome was assessed by Engel's classification.RESULTS:
The SOZ in PTE was most often located in temporal lobes, followed by frontal lobes. The SOZ was network-organized in the majority of the cases. Half of the SOP did not contain fast discharges. Half of the recordings showed SOZ that were less extensive than the posttraumatic lesions seen on brain magnetic resonance imaging (MRI). All but one operated patient benefited from tailored cortectomy. Only 3 patients were contraindicated for surgical resection due to bilateral epileptogenicity. The overall surgical outcome was good in majority of patients (67% Engel I).CONCLUSION:
Despite the potential risk of bilateral or multifocal epilepsy, patients with PTE may benefit from presurgical assessment in well-selected cases. In this context, SEEG allows guidance of tailored resections adapted to the SOZ.Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Hemispherectomy
/
Epilepsy
Type of study:
Observational_studies
/
Risk_factors_studies
Limits:
Adult
/
Humans
Language:
En
Journal:
Epilepsy Behav
Journal subject:
CIENCIAS DO COMPORTAMENTO
/
NEUROLOGIA
Year:
2020
Type:
Article
Affiliation country:
Belgium