[Giant aneurysm of the sylvian artery in a 4-year old child (exeresis, remission)].

The AA. describe a case of a giant aneurysm 6 centimeters in diameter in a child of 4 years old. The lesion was made evident on the occasion of an hemorrhage that has caused an insular hematoma. The patient has undergone an operation with favourable outcome. The lack of neurologic symtomatology until the moment of the hemorrhage lead the AA. to think that this lesion was of the notables proportions from the moment of birth, so that the cerebral parenchyma was modeled on it. Unlike others cases in litterature recogniset, the wall of the aneurysmatic bag did not present fibrotics thickenings, and besides the blood-clot included in it seemed histologicaly of recent formation.