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Published on: June 11, 2020
Isolated neonatal seizures: when to suspect inborn errors of metabolism
Can Ficicioglu1, David Bearden
1Department of Pediatrics, Children’s Hospital of Philadelphia, 3501 Civic Center Boulevard, Colket (CTRB), 9th Floor, Number 54, Philadelphia, PA 19104, USA. Ficicioglu@email.chop.edu
Insights
Neonatal seizures can signal brain dysfunction. Inborn errors of metabolism present diagnostic challenges but early detection and treatment of these metabolic disorders improve outcomes.
Area of Science:
- Neurology
- Metabolic Disorders
- Neonatal Medicine
Background:
- Neonatal seizures are a common sign of central nervous system dysfunction.
- While often caused by identifiable issues like hypoxic-ischemic injury or infections, seizures due to inborn errors of metabolism require heightened clinical suspicion.
- Inborn errors of metabolism can be challenging to diagnose but are critical to identify early for effective treatment.
Purpose of the Study:
- To highlight the significance of inborn errors of metabolism in neonatal seizures.
- To outline key indicators for suspecting metabolic disorders in neonates with seizures.
- To review common inborn errors of metabolism causing neonatal seizures, including diagnostic and treatment strategies.
Main Methods:
- Literature review focusing on inborn errors of metabolism and neonatal seizures.
- Analysis of diagnostic red flags and clinical presentations.
- Synthesis of current treatment approaches for relevant metabolic disorders.
Main Results:
- Inborn errors of metabolism are an important, though often overlooked, cause of neonatal seizures.
- Specific clinical signs and symptoms can suggest a metabolic etiology.
- Prompt diagnosis allows for targeted interventions, often with significant positive impacts on long-term development.
Conclusions:
- Considering inborn errors of metabolism in the differential diagnosis of neonatal seizures is essential.
- Early identification and management of metabolic disorders can lead to better neurological outcomes.
- A high index of suspicion and targeted investigations are crucial for diagnosing these conditions.
Abstract:
Neonatal seizures are common, and often comprise the first clinical indicator of central nervous system dysfunction. Although most neonatal seizures are secondary to processes such as hypoxic-ischemic injury, infection, or cortical malformations (which are readily identifiable through routine testing and imaging), seizures secondary to inborn errors of metabolism can be much more difficult to diagnose, and thus a high index of suspicion is required. The early diagnosis of inborn errors of metabolism is crucial, considering that many can receive effective treatment (e.g., dietary supplementation or restriction) with favorable long-term outcomes. This review emphasizes the importance of considering inborn errors of metabolism in the differential diagnosis of neonatal seizures, discusses red flags for inborn errors of metabolism as a cause of neonatal seizures, and provides an overview of diagnoses and treatments of inborn errors of metabolism most commonly associated with neonatal seizures.
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