前脊髄動脈瘤の破裂によりくも膜下出血を発症した一例

抄録

  Anterior spinal artery aneurysms are rare, and usually associated with vascular pathology such as arteriovenous malformations, Moyamoya disease or coarctation of the aorta. We report a case of subarachnoid hemorrhage due to rupture of an aneurysm without concomitant vascular disease. A 71-year-old man suddenly presented with severe headache, and was admitted to our hospital. Computed tomography revealed subarachnoid hemorrhage. Angiography demonstrated bilateral vertebral artery occlusion, and dilated anterior spinal artery which perfused the posterior circulation. The aneurysm was located at C3 level of the anterior spinal artery. Corpectomy of C2 and C3, and clipping of the aneurysm was performed the next day. We discuss the etiology and treatment of anterior spinal artery aneurysms.