A genetic diagnostic approach to infantile epileptic encephalopathies
Benjamin A Kamien1, Michael Cardamone, John A Lawson
1Department of Medical Genetics, Sydney Children's Hospital, High St., Randwick, New South Wales 2031, Australia. benkamien@yahoo.com.au
Insights
Infantile epileptic encephalopathy is a severe condition often caused by genetic factors. Identifying the specific gene helps in genetic counseling and offers options for prenatal testing, improving family support.
Area of Science:
- Neurology
- Genetics
- Pediatrics
Background:
- Epileptic encephalopathies present with severe seizures and developmental issues, often having a poor prognosis.
- Epileptiform abnormalities can worsen brain function over time.
- Identifying the cause of infantile epileptic encephalopathy is crucial for recurrence risk assessment and prenatal diagnosis.
Purpose of the Study:
- To review recent genetic discoveries in epilepsy.
- To focus on monogenic causes beneficial for genetic counseling.
- To propose a diagnostic work-up for genetic testing in infants with epileptic encephalopathy.
Main Methods:
- Literature review of recent studies on epilepsy genetics.
- Focus on identifying monogenic causes of infantile epileptic encephalopathy.
- Development of a diagnostic algorithm for genetic testing.
Main Results:
- Recent studies have identified novel genes associated with epilepsy.
- Knowledge of monogenic causes is valuable for genetic counseling.
- A structured diagnostic work-up can guide genetic testing.
Conclusions:
- Early etiological diagnosis of infantile epileptic encephalopathy is essential.
- Genetic testing, guided by a diagnostic work-up, is key for management and counseling.
- Identifying genetic causes improves support for affected families.
Abstract:
Epileptic encephalopathies are characterized by frequent severe seizures, and/or prominent interictal epileptiform discharges on the electroencephalogram, developmental delay or deterioration, and usually a poor prognosis. The epileptiform abnormalities themselves are believed to contribute to the progressive disturbance in cerebral function. Determining the underlying aetiology responsible for infantile epileptic encephalopathy is a clinical challenge worth undertaking to facilitate advice on the recurrence risk and to allow for the option of prenatal testing, as often this category of epilepsy is associated with devastating hardship for families. This review takes advantage of recently published studies that have identified new genes associated with epilepsy and focuses on known monogenic causes where detection is useful for the process of genetic counselling. Based on the review, we present a diagnostic work-up in order to triage specific genetic testing for infants presenting with an epileptic encephalopathy.
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