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Febrile convulsion

Definition:

Generalized, tonic-clonic seizure associated with a febrile illness, in infancy

and childhood but without any CNS infection, severe metabolic disturbance,

or other known neurological cause

Criteria of typical febrile convulsion:

-Susceptible age: 9 mo up to 5 yrs.

-Fever : rapid rising of body temperature or when core temperature reaches

39 C or greater

-Convulsions:

Generalized tonic clonic

Brief (few seconds to 15 minutes)

One fit during the same illness in 24 h

Usually followed by a short post ictal peiod of drowsiness

-Evident extra cranial infection e.g. tosilitis , AOM

-No signs of CNS infection e.g. meningeal irritation

Risk of epilepsy development:

1~2% in the general population

increase up to 9% when two or more risk factors are present

Criteria of Atypical Febrile convulsion :

Focal , repeated during the same illness , prolonged > 15 min

10% of these cases may develop epilepsy later on