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Published on: June 13, 2025
Epilepsy in hydrocephalic children
A L Saukkonen1, W Serlo, L von Wendt
1Department of Pediatrics, University of Oulu, Nordic Council for Arctic Medical Research, Finland.
Insights
Epilepsy affects nearly half of hydrocephalic (HC) children treated with shunts. Prophylactic anticonvulsant medication significantly reduces seizure risk in these patients.
Area of Science:
- Pediatric Neurology
- Neurosurgery
- Epileptology
Background:
- Hydrocephalus (HC) is a common condition in children, often requiring shunt treatment.
- Epilepsy is a frequent comorbidity in children with hydrocephalus.
- The relationship between shunt treatment, hydrocephalus, and epilepsy requires further investigation.
Purpose of the Study:
- To investigate the incidence and characteristics of epilepsy in children with hydrocephalus undergoing shunt treatment.
- To identify risk factors and predictive markers for epilepsy in this cohort.
- To evaluate the efficacy of prophylactic anticonvulsant medication.
Main Methods:
- Retrospective study of 168 children with hydrocephalus treated with shunts.
- Analysis of seizure occurrence, electroencephalogram (EEG) findings, and shunt-related complications.
- Correlation of epilepsy with etiological factors, shunt revisions, infections, and slit ventricles (SLV).
Main Results:
- 47.6% of patients experienced epileptic seizures during a mean follow-up of 8.9 years.
- Epilepsy onset occurred both before and after initial shunting.
- Generalized spike and wave activity (SWA) on EEG, particularly in neonates, was associated with persistent seizures.
- Prophylactic anticonvulsant medication reduced seizure incidence (68.1% seizure-free) compared to no medication.
- Slit ventricles (SLV) were more frequently associated with epilepsy after the first postoperative year.
Conclusions:
- Epilepsy is a significant concern in shunt-treated hydrocephalic children.
- Neonatal EEG findings, specifically generalized SWA, may predict persistent epilepsy.
- Prophylactic anticonvulsant therapy appears effective in preventing seizures.
- The development of slit ventricles may be a risk factor for late-onset epilepsy.
Abstract:
Epilepsy and epileptogenic activity in EEGs were studied in 168 shunt treated hydrocephalic (HC) children, the mean age at first operation 1.62 years (SD 1.87). 80 patients (47.6%) suffered from epileptic seizures during the follow-up period (mean 8.9 years). The epileptic seizures appeared before the initial shunting, and after the first shunt implantation in 43 (25.6%). There was no correlation between epilepsy and the aetiology of HC, number of shunt revisions, or shunt infections. Sixteen patients suffered from seizures during the neonatal period. Generalized spike and wave activity (SWA) was seen in EEG in eight out of these, and only one was seizure-free at the end of the follow-up period. All eight patients with epileptic seizures during the neonatal period without generalized SWA in EEG were seizure-free, however. SWA was seen in the first EEG prior to shunting in 75/168 patients (44.6%). All those patients who did not receive prophylactic medication, developed epileptic seizures, whereas 68.1% of those who received prophylactic anticonvulsive medication remained free of seizures. Partial epilepsy after shunting manifested itself in 15 patients, but this did not correlate with the side of the shunt or with the side of the SWA in the EEG. Slit ventricles (SLV) developed in 75 patients during the follow-up period, while the ventricles remained normal or dilated in 66 cases (27 patients had no CT follow-up). Epilepsy manifested itself in 8 out of these 141 patients (2 SLV, 6 non-SLV) during the first postoperative year, and in 29 patients in the SLV group and one in the non-SLV group at some time after the first postoperative year.
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