Genetic Testing May Help Spot Epilepsy Risk Early

What was studied

This retrospective, single-center study examined the genetics of complex febrile seizures in 233 children ages 6 months to 6 years at Wuhan Children's Hospital in China. All children met at least one predefined high-risk criterion and underwent targeted epilepsy gene panel sequencing.

The researchers reviewed cases from July 2019 to January 2025, identified pathogenic or likely pathogenic genetic variants using ACMG/AMP criteria, and compared clinical features between children with and without these variants.

What they found

Sixty-seven children (28.8%) had a pathogenic or likely pathogenic genetic variant, involving 18 genes. Voltage-gated sodium channel genes were the most common among positive cases, and SCN1A was the most frequent single gene.

Children who met 2 or more high-risk criteria had a higher diagnostic yield than children with only 1 criterion. Children with a positive genetic finding also had higher rates of status epilepticus, developmental delay, and abnormal interictal EEG.

Among children with SCN1A variants, 70.6% progressed to Dravet syndrome. The authors also reported that genetic findings modified antiseizure medication management in 62.7% of positive cases.

Limits of the evidence

This was a retrospective study from a single hospital, so the findings may not generalize to other populations or care settings. The study only included a clinically selected high-risk group, so the diagnostic yield reported here should not be assumed for all children with febrile seizures.

The abstract reports associations, but it does not establish that the genetic variants caused the clinical differences observed or that genetic testing improved patient outcomes. The abstract also does not provide full details on the predefined high-risk criteria, follow-up duration, or the specific effects of medication changes.

For families and caregivers

For families, this study suggests that genetic testing may be informative in some children with complex febrile seizures who have additional high-risk features, especially when more than one high-risk criterion is present. A genetic result may help doctors identify children at higher risk for later epilepsy syndromes, and in some cases may help guide medicine choices.

At the same time, most children in this study did not have a clearly pathogenic or likely pathogenic result, and this was a selected high-risk group rather than all children with febrile seizures. Families should not assume that every child with a febrile seizure needs genetic testing based on this study alone.

What to watch next

Larger, multi-center studies with follow-up over time could help clarify how well these findings apply to broader populations and how genetic results relate to later clinical outcomes and treatment decisions.

Terms in this summary

complex febrile seizures

Fever-related seizures in young children that have features making them more concerning, such as lasting longer, happening more than once in 24 hours, or affecting one part of the body.

pathogenic/likely pathogenic variant

A DNA change that is known, or strongly suspected, to cause disease.

gene panel sequencing

A test that looks at a selected group of genes linked to a condition, rather than checking all genes.

EEG

A test that records the brain's electrical activity.

interictal EEG

An EEG done between seizures, not during a seizure.

status epilepticus

A seizure that lasts a long time or repeated seizures without full recovery in between; this is a medical emergency.

SCN1A

A gene involved in sodium channels in brain cells; changes in this gene are linked to some seizure disorders, including Dravet syndrome.

Dravet syndrome

A severe epilepsy syndrome that often begins in infancy and can be linked to fever-triggered seizures and developmental problems.