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Pediatric refractory epilepsy related to tuberous sclerosis complex: A retrospective-cohort study of diagnosis and
Rongbo Lin1, Zhao Liao2, Lingyu Kong3
1Department of Neurology, Shenzhen Children's Hospital, Shenzhen, China 518038, China; Department of Emergency, Shenzhen Children's Hospital, Shenzhen, China 518038, China.
Insights
Refractory epilepsy (RE) in tuberous sclerosis complex (TSC) is linked to infantile spasms, TSC2 mutations, and lesion type. Early intervention with vigabatrin and sirolimus may reduce RE occurrence in pediatric patients.
Area of Science:
- Neurology
- Genetics
- Pediatrics
Background:
- Tuberous sclerosis complex (TSC) frequently leads to refractory epilepsy (RE).
- Identifying risk factors for RE in TSC is crucial for effective management.
- This study investigates various factors contributing to RE in pediatric TSC patients.
Purpose of the Study:
- To identify significant risk factors for refractory epilepsy (RE) in pediatric patients with tuberous sclerosis complex (TSC).
- To analyze the correlation between clinical data, treatment, genetic factors, and RE development.
- To provide insights for early intervention strategies to mitigate RE in TSC.
Main Methods:
- A cohort of 315 pediatric TSC patients with epilepsy was divided into control and RE groups.
- Multimodal data including clinical, genetic, imaging, and EEG findings were analyzed.
- Risk factors for RE were characterized using statistical analysis.
Main Results:
- Infantile spasms, TSC2 mutations, clustered seizures, family history, and specific lesion types (II and III) were positively correlated with RE.
- Early age of onset and vigabatrin use showed a negative correlation with RE.
- Lesion type, particularly type II, was a significant predictor of RE risk, increasing it by 1.63-fold.
Conclusions:
- Key risk factors for RE in TSC include early age of onset, infantile spasms, type II lesions, TSC2 mutations, family history, and clustered seizures.
- Anti-seizure medication (ASM) is recommended even with subclinical EEG findings.
- Early use of vigabatrin and sirolimus may decrease the incidence of RE in children with TSC.
Background:
Tuberous sclerosis complex (TSC) patients often develop refractory epilepsy (RE). The present study evaluated numerous risk factors associated with TSC to determine risk factors of RE.
Methods:
After enrollment, 315 pediatric patients with TSC-associated epilepsy were divided into control and RE groups. Multimodal data were used to characterize risk factors for RE, including clinical data, anti-seizure medication (ASM) or sirolimus use, family history, genotype, seizure types, neuroimaging and EEG findings, and developmental assessments.
Results:
Infantile spasms, number of ASMs being taken, clustered seizures, family history, TSC2 mutation, and presence of type II and Ⅲ lesions were positively correlated with RE. Age of onset, age of first hospital visit, and use of vigabatrin were negatively correlated with RE. MRI findings suggest lesion type is more important than lesion size and location in predicting RE. There were significant differences in spasms and delayed motor development or cognitive delay between the control and RE groups. Valproate was the most common ASM used, followed by vigabatrin and oxcarbazepine. Risk of RE was increased as much as 1.63-fold by the presence of type II lesions.
Conclusions:
Age of onset, infantile spasms, type II lesions, TSC2 mutation status, family history, and clustered seizures were identified as potential risk factors for the development of RE. ASM should be recommended for TSC patients even in cases with subclinical epileptiform EEG discharge. Using vigabatrin and sirolimus earlier in childhood may reduce the occurrence of RE.
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