title: Subarachnoid hemorrhage in childhood and adolescence.
abstract: The authors have reviewed 167 cases of subarachnoid hemorrhage (SAH) occurring in patients aged 20 years and younger in a 23-year period. The modes of presentation and etiology of SAH are similar in childhood and adolescence and in the adult population, but there was a different incidence of the specific pathology producing the bleeding in this series. Twenty-six percent of cases were due to bleeding arteriovenous malformations, 52% were due to ruptured aneurysms, and in 19% no cause was found. Aneurysms in this young age group differed in several important respects from those in the adult population: there was a male predominance, a higher incidence of internal carotid bifurcation aneurysms was seen, and multiple aneurysms were encountered less commonly.
mesh_terms: D000293:Adolescent; D000328:Adult; D001165:Arteriovenous Malformations / Q000150:complications; D002533:Cerebral Angiography; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D002532:Intracranial Aneurysm / Q000150:complications; D008297:Male; D013345:Subarachnoid Hemorrhage / Q000000981:diagnostic imaging / Q000209:etiology*; D014057:Tomography, X-Ray Computed