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Hippocampal resection during hemispherotomy: is it needed?
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Journal Article
Hippocampal resection during hemispherotomy: is it needed?
2024
Overview
Purpose
Hemispherotomy is an effective surgery for intractable pediatric hemispheric epilepsy. Over the years, the surgical goal has shifted from a complete hemispheric resection (anatomical hemispherectomy) to a disconnective hemispherotomy (DH). Multiple techniques for DH have been described, and often, anterior temporal lobectomy (ATL, with hippocampal resection) is performed. The goal of the current study is to assess the role of hippocampal resection in DH.
Methods
We retrospectively collected all clinical data of children (< 18 years old) who underwent DH between 2001 and 2022 at two tertiary large centers. Epilepsy status and surgical outcome were compared, based on whether the hippocampus was resected (as part of an ATL) or disconnected at the amygdala and atrial segment of the fornix (with no ATL).
Results
A total of 86 patients (32 females) were included. The most common epilepsy etiologies were stroke (31), Rasmussen’s encephalitis (16), cortical dysplasia (10), and hemimegaloencephaly (9). The mean age at surgery was 7 (± 4.9) years. The average number of anti-seizure medications (ASMs) at surgery was 3 (± 1.2). Hemispherotomy techniques included peri-insular (54), vertical (23 [19 endoscopic + 4 parasagittal]), and trans-sylvian (9). The mean follow-up was 41.5 (± 38) months. Forty-three patients had hippocampal resection, and 43 patients had a hippocampal disconnection. Both groups had similar Engel outcome scores (
p
= 0.53).
Conclusions
Disconnective hemispherotomy is highly effective for pediatric intractable hemispheric epilepsy. Our data suggest that the inclusion of hippocampal resection does not provide additional benefit.
Publisher
Springer Berlin Heidelberg,Springer Nature B.V
