[Trauma-induced arterial aneurysm in childhood. Report of a case and review of the literature].

We report a case of calloso-marginal artery aneurysm in a 3 year old child, revealed 3 weeks after a craniocerebral trauma with frontal embarrure, by a sudden subarachnoidal hemorrhage syndrome with loss of consciousness and coma. The CT scan confirmed the subarachnoid hemorrhage in all the basal cisterns, with an interhemispheric subdural hematoma. The carotid angiography showed a right calloso-marginal aneurysm. The child has been operated (coagulation of the artery and excision of the false aneurysm. We studied the mechanism of pediatric post-traumatic aneurysm, the histological and clinical presentation emphasizing the necessity of a complete neuroradiological exploration when new neurological symptoms develop after head trauma. Neurosurgical and/or endovascular neuroradiological treatment is mandatory.