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Epilepsy in inborn errors of metabolism
Nadia Bahi-Buisson1, Olivier Dulac
1Department of Pediatric Neurology, Université Paris Descartes; Imaging Institute; INSERM U781, Paris, France.
Handbook of Clinical Neurology
|April 30, 2013
Summary
Epilepsies linked to inborn errors of metabolism (IEM) often present with varied neurological symptoms. Some IEM-related epilepsies are treatable with specific interventions like vitamin B6 or GLUT1 deficiency (GLUT1DS) therapies.
Area of Science:
- Neurology
- Metabolic Disorders
- Genetics
Background:
- Epilepsies associated with inborn errors of metabolism (IEM) pose significant diagnostic and therapeutic challenges.
- Seizures in IEM are often secondary to other neurological symptoms like hypotonia and cognitive disturbances.
Purpose of the Study:
- To classify epilepsies associated with IEM based on their treatability.
- To identify specific IEMs that are potentially treatable, incompletely treatable, or untreatable.
Main Methods:
- Review and classification of IEMs presenting with epilepsy.
- Categorization based on the availability of specific treatments.
Main Results:
- Potentially treatable IEMs include vitamin B6 deficiency, biotinidase deficiency, and GLUT1 deficiency syndrome (GLUT1DS).
- Incompletely treatable IEMs include pyridoxal phosphate, serine, and creatine deficiencies.
- Untreatable IEMs include nonketotic hyperglycinemia, mitochondrial disorders, and peroxisomal disorders.
Conclusions:
- A pragmatic classification of IEM-related epilepsy is based on treatment accessibility.
- Early diagnosis and targeted treatment are crucial for managing treatable IEM-associated epilepsies.
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