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A case of extreme prematurity and delayed diagnosis of pyridoxine-dependent epilepsy

Abdulaziz S Al-Saman1, Tamer M Rizk

  • 1Department of Pediatric Neurology, National Neuroscience Institute, King Fahad Medical City, Riyadh, Kingdom of Saudi Arabia.

Neurosciences (Riyadh, Saudi Arabia)
|October 2, 2012
PubMed

Insights

Pyridoxine-dependent epilepsy, a rare condition, requires lifelong vitamin B6 treatment. Early diagnosis and management are crucial, even in premature infants with difficult-to-treat seizures.

Area of Science:

  • Neurology
  • Genetics
  • Biochemistry

Background:

  • Pyridoxine-dependent epilepsy (PDE) is a severe genetic disorder presenting in infancy.
  • It is characterized by refractory seizures unresponsive to standard antiepileptic drugs.
  • Lifelong pyridoxine (vitamin B6) supplementation is the only effective treatment.

Observation:

  • A premature infant born at 25 weeks gestation exhibited abnormal movements and refractory status epilepticus.
  • Seizures were resistant to multiple antiepileptic medications.
  • Intravenous pyridoxine successfully controlled the seizures.

Findings:

  • Elevated urinary α-aminoadipic semialdehyde confirmed PDE.
  • Genetic analysis revealed a homozygous c.1195G>C mutation in the ALDH7A1 gene.
  • The ALDH7A1 gene encodes aldehyde dehydrogenase 7 family member A1.

Implications:

  • This case highlights the importance of considering PDE in infants with unexplained, refractory seizures, irrespective of prematurity.
  • Early diagnosis and pyridoxine treatment can prevent severe neurological consequences.
  • Genetic confirmation of ALDH7A1 mutations solidifies the diagnosis and guides long-term management.

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