Spinal Arterial Aneurysm

Abstract

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.

Subarachnoid Hemorrhage Caused by a Ruptured Anterior Spinal Artery Aneurysm -Case Report-

“…High blood flow caused by AVMs and collateral routes induced by coarctation of the aorta have been considered to be significant etiological factors for the formation of aneurysms. 10,15) Hemodynamic stress caused by bilateral vertebral artery occlusions was the etiological factor for one case of anterior spinal artery aneurysm. 7) Two cases of lateral spinal artery aneurysms were probably caused by hemodynamic stress from high-grade stenosis of the vertebral artery.…”

“…15,16) There are several hypotheses concerning the causal factors, such as inflammatory reaction, infection, or connective tissue disorders. 1,3,8) In contrast, spinal artery aneurysms without definite underlying disease have also been reported, as in the present case.…”

“…[1][2][3]5,[8][9][10][12][13][14][15]18,19) Three cases of spinal artery aneurysms were found to be fusiform, dissecting lesions at surgery. 11) Another ruptured posterior spinal artery aneurysm was confirmed to be a dissecting lesion by histopathological analysis.…”

“…10,15) Spinal artery aneurysms may manifest as compressive lesions or subarachnoid hemorrhage (SAH). 10) Only 25 cases of ruptured isolated spinal artery aneurysms have been reported.…”

“…10) Only 25 cases of ruptured isolated spinal artery aneurysms have been reported. [1][2][3][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20] We describe a case of an isolated anterior spinal artery aneurysm manifesting as SAH and then eventually disappeared, as confirmed on follow-up angiography.…”