Dissecting aneurysm of the radiculomedullary artery originating from extracranial vertebral artery dissection in a patient with rheumatoid cervical spine disease: an unusual cause of subarachnoid hemorrhage. Case report - Toyota, S; Wakayama, A; Fujimoto, Y; Sugiura, S; Yoshimine, T (J Neurosurg Spine, 2007)