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Related Experiment Videos

Genetic predisposition to West syndrome

O Dulac1, J Feingold, P Plouin

  • 1Neuropediatric Department, Hôpital Saint Vincent De Paul, Paris, France.

Epilepsia
|July 1, 1993
PubMed
Summary

The recurrence risk for West syndrome (WS) is low, especially when genetic causes are excluded. Familial studies show increased WS incidence but not febrile convulsions, with recurrence risk under 1% in most cases.

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Area of Science:

  • Neurology
  • Genetics
  • Pediatrics

Background:

  • West syndrome (WS) is a severe form of epilepsy in infancy.
  • Understanding familial recurrence risk is crucial for genetic counseling and prognosis.

Purpose of the Study:

  • To determine the familial recurrence risk of West syndrome (WS).
  • To identify factors influencing WS recurrence in families.

Main Methods:

  • Studied familial antecedents of consecutively referred West syndrome patients.
  • Compared incidence of WS, febrile convulsions, and epilepsy in siblings of patients versus control groups.
  • Excluded cases with identifiable genetic causes or specific clinical syndromes.

Main Results:

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  • Siblings of WS patients showed increased WS incidence but not febrile convulsions.
  • Familial epilepsy incidence was intermediate between epileptic and nonepileptic controls.
  • When identifiable familial diseases were excluded, the recurrence risk for WS was less than 1%.

    • Conclusions:

    • The recurrence risk for West syndrome is low (<1%) when identifiable genetic causes are excluded.
    • Identifiable causes in familial WS cases included twin pregnancy, tuberous sclerosis, and maternal toxemia.
    • Some familial cases suggest an unidentifiable progressive encephalopathy.