Isolated aneurysms of the spinal artery (not associated with arteriovenous malformations) are exceptionally rare. Fewer than 17 cases have been reported in the literature. We report a case of an isolated spinal artery aneurysm causing acute subarachnoid hemorrhage. Spinal artery aneurysms are contrasted with the more common intracranial aneurysms in terms of presentation and pathogenesis. The various clinical presentations of spinal artery aneurysms are discussed as well. A summary of all reported cases of spinal aneurysms, with and without associated arteriovenous malformations, is listed.
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Rengachary et al. (1993) studied this question.
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