Transsylvian selective amygdalohippocampectomy in children with hippocampal sclerosis: seizure, intellectual and
Anne E Beaton1, Andrew Durnford, Phillip E Heffer-Rahn
1University Hospital Southampton, Southampton SO16 6YD, UK. anne.beaton@uhs.nhs.uk
Insights
Transylvian selective amygdalohippocampectomy (TS SAH) effectively controls seizures in children with hippocampal sclerosis. Cognitive outcomes remained stable, with notable improvements in facial memory, challenging prior beliefs about TS SAH efficacy.
Area of Science:
- Pediatric Neurosurgery
- Epileptology
- Cognitive Neuroscience
Background:
- Medically intractable epilepsy in children often stems from unilateral hippocampal sclerosis.
- Surgical interventions are considered when conservative treatments fail.
- Transylvian selective amygdalohippocampectomy (TS SAH) is a specialized neurosurgical procedure.
Purpose of the Study:
- To evaluate the efficacy of TS SAH in pediatric patients with hippocampal sclerosis.
- To assess post-surgical seizure control and cognitive outcomes (intellectual and memory functions).
Main Methods:
- Retrospective analysis of pre- and post-surgical data from 10 pediatric patients.
- Follow-up period of 24 months post-TS SAH.
- Comparison of seizure frequency, antiepileptic drug (AED) use, intellect, and memory before and after surgery.
Main Results:
- High seizure freedom rates: 90% at 12 months and 87.5% at 24 months (Engel I classification).
- No significant group-level decline in intellect or verbal/visual memory.
- Significant improvement in immediate and delayed facial memory post-operatively.
Conclusions:
- TS SAH demonstrates good post-surgical seizure control in children with hippocampal sclerosis.
- Cognitive outcomes are generally favorable, with specific memory improvements.
- Findings challenge previous notions regarding the ineffectiveness of SAH in pediatric epilepsy surgery.
Purpose:
This study investigates the efficacy of transylvian selective amygdalohippocampectomy (TS SAH) in children with medically intractable epilepsy due to unilateral hippocampal sclerosis. Post-surgical seizure control, intellectual and memory outcomes are examined.
Method:
This study reports on pre- and post-surgical clinical data from 10 patients who underwent TS SAH between 2002 and 2010 after 24 months follow-up. Pre- and post-operative change in seizure frequency, AED use, intellect and memory are compared.
Results:
At 12 months and 24 months post-surgery, 9/10 (90%) and 7/8 (87.5%) patients respectively, were seizure free (Engel I). No patients were classed as Engel III or IV. No significant improvement or decline at a group level was found on measures of intellect or verbal or visual memory. One hundred per cent improved or remained within 1 SD of their pre-operatives score on verbal and perceptual reasoning learning and reasoning measures. Significant improvement was found post-operatively for both immediate and delayed facial memory.
Conclusion:
Our findings of good post-surgical seizure control and favourable cognitive outcome provides evidence against previous findings that SAH in children may not be effective.
