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[Benign familial neonatal seizures].

H Siemes1

  • 1Rittberg-Kinderklinik, Berlin.

Monatsschrift Kinderheilkunde : Organ Der Deutschen Gesellschaft Fur Kinderheilkunde
|June 1, 1990
PubMed
Summary

Benign familial neonatal seizures are an inherited condition affecting newborns, typically resolving within 8 months. While most infants develop normally, a small percentage may experience developmental delays or later epilepsy.

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Area of Science:

  • Genetics
  • Neurology
  • Pediatrics

Background:

  • Benign familial neonatal seizures (BFNS) are a rare, inherited cause of seizures in newborns.
  • Characterized by autosomal dominant inheritance, BFNS is identifiable through family history.

Observation:

  • BFNS exclusively affects full-term newborns.
  • Seizures manifest as multifocal-clonic, focal-clonic, or subtle types, beginning around the 3rd day of life (range: 1-8 days) with high frequency (up to 40/day).
  • Patients exhibit normal neurological status between seizures, with unremarkable clinical, laboratory, and neuroradiological findings.

Findings:

  • Seizures typically resolve spontaneously within 8 months.
  • Phenobarbital is a common treatment, though transient relapses can occur after discontinuation.
  • Prognosis is generally good, with normal mental development in most cases; however, 4% experience mental retardation and 10% develop epilepsy later in life.

Implications:

  • Distinguishing BFNS from other neonatal seizure causes, like fifth-day fits, is crucial for accurate diagnosis and management.
  • Understanding the genetic basis and long-term outcomes of BFNS informs genetic counseling and clinical monitoring.

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