This joint study describes 43 cases of intracranial arterial aneurysms in children diagnosed on the basis of clinical symptoms. In the pediatric age group, this malformation is notable because of the marked sex predilection in males (70%) and an unequal topographic incidence in the circle of Willis, where carotid artery (39.3%) and anterior communicating artery lesions (30%) predominate. The most frequent clinical sign was subarachnoid hemorrhage (81%), although symptoms caused by compression revealed the abnormality in 2.3% of patients. In this series, 11% of the patients suffered a head injury at the time of the hemorrhagic accident; this finding has been reported previously in the literature. Today, treatment is always surgical, consisting in removal of the aneurysmal sac. Surgical results are encouraging; all grade lesions considered together, 63.4% of the children were cured without any sequelae, 19.5% lost one school year but were able to lead a normal life, and 4.8% remained severely handicapped; overall postoperative mortality was 12.3%. Cerebral plasticity and tolerance of spasm in children are fundamental features of this aneurysmal pathology which partially explain the favorable results obtained with surgery.