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 ORIGINAL ARTICLE
Year : 2013  |  Volume : 61  |  Issue : 3  |  Page : 288--292

Extended resection of hemosiderin fringe is better for seizure outcome: A study in patients with cavernous malformation associated with refractory epilepsy


1 Department of Neurosurgery, West China Hospital, Sichuan University, Chengdu 610041, Sichuan, PR China
2 Department of Medical Statistics, West China Hospital, Sichuan University, Chengdu 610041, Sichuan, PR China

Correspondence Address:
Chao You
Department of Neurosurgery, West China Hospital, Sichuan University, 37 Guo Xue Xiang Street, Chengdu 610041, Sichuan
PR China
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/0028-3886.115070

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Background: Cerebral cavernous malformation (CCM) is frequently associated with intractable focal epilepsy. Epileptogenicity is usually attributed to the hemosiderin deposits. Extent of resection is a crucial issue for achieving good seizure outcome. Aim: To assess whether seizure outcome is related to the extended resection (ER) of surrounding hemosiderin fringe brain tissue. Materials and Methods: Between April 2000 and April 2008, 132 patients with CCM and refractory epilepsy were scheduled for surgery based on the high-resolution magnetic resonance imaging (MRI) findings and intensive video-electroencephalogram (EEG) monitoring. All patients underwent pre- and post-operative MRI. Based on MRI findings patients were grouped into: ER group (ER, hemosiderin completely removed) and lesionectomy group (LE, hemosiderin not/partially removed). Post-operative seizure outcome was compared between the two groups based on Engel and the International League Against Epilepsy outcome scales. Results: At 1-year follow-up of the 86 patients in the ER group, 54 (74.4%) achieved seizure free outcome and in the LE group of the 46 patients, 20 (59.5%) achieved seizure-free outcome. At 5-year follow-up, 59.5% (25/42) of patients in ER group and 27.8% (5/18) of patients in LE group achieved seizure-free outcome. ER was not associated with increased neurological morbidity. Conclusions: Our study suggests that complete removal of hemosiderin fringe brain tissue surrounding CCMs may improve short-term and long-term seizure outcome.






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