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Uncovered primary seizure foci in Lennox-Gastaut syndrome after corpus callosotomy

Authors
 Yun Jung Hur  ;  Hoon-Chul Kang  ;  Dong Seok Kim  ;  Sae Rom Choi  ;  Heung Dong Kim  ;  Joon Soo Lee 
Citation
 Brain & Development, Vol.33(8) : 672-677, 2011 
Journal Title
 Brain & Development 
ISSN
 0387-7604 
Issue Date
2011
Abstract
PURPOSE: Corpus callosotomy (CC) is a palliative surgical procedure to control atonic, tonic, or generalized tonic-clonic seizure in Lennox-Gastaut syndrome (LGS). Here, we report patients with LGS who underwent resective surgery, following CC better delineating the presumed seizure foci localized in one hemisphere. METHODS: We retrospectively reviewed seven patients with LGS who underwent CC and subsequent cortical resection. The median follow-up duration after lobectomy was 20 months (range, 15-54 months) and three patients had follow-up periods over 24 months. The findings of video electroencephalography (EEG) monitoring, structural and functional neuroimagings were compared between pre- and post-CC. RESULTS: Four patients had Engel class I and one patient had Engel class II outcomes following cortical resection; post-CC, compared to pre-CC, showed better localized ictal/interictal epileptiform discharges in the unilateral frontal area in two patients, in the unilateral parieto-temporo-occipital areas in one patient and in the unilateral fronto-temporal areas in the remaining two patients. Two patients had Engel Class III outcome following cortical resection; post-CC EEG continued to show multifocal epileptiform discharges but predominantly arising from a unilateral frontal area. Following CC, positron emission tomography showed localized glucose hypometabolism of which location was concordant with post-CC EEG abnormalities in all patient. Similarly, ictal/interictal single photon emission computed tomography also showed localized abnormalities concordant with post-CC EEG abnormalities in five of the six patients. Pathological assessment revealed cortical dysplasia in six patients, whereas no pathological abnormality was found in the remaining patient, who obtained Engel Class I outcome following cortical resection. CONCLUSION: CC could change EEG findings, glucose metabolisms and cerebral blood flows, and it is sometimes helpful in delineating the primary seizure focus in patients with LGS.
URI
https://ir.ymlib.yonsei.ac.kr/handle/22282913/93664
Full Text
http://www.sciencedirect.com/science/article/pii/S0387760410002925
DOI
10.1016/j.braindev.2010.11.005
Appears in Collections:
1. Journal Papers (연구논문) > 1. College of Medicine (의과대학) > Dept. of Pediatrics (소아청소년과학교실)
1. Journal Papers (연구논문) > 1. College of Medicine (의과대학) > Dept. of Neurosurgery (신경외과학교실)
Yonsei Authors
강훈철(Kang, Hoon Chul) ORCID logo https://orcid.org/0000-0002-3659-8847
김동석(Kim, Dong Seok)
김흥동(Kim, Heung Dong)
이준수(Lee, Joon Soo)
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