Abstract
We report a case of vertebral dissecting aneurysm appearing in Wallenberg's syndrome, complicated with headache. The patient was a 48-year-old woman. About 4 months after the first attack of headache in Wallenberg's syndrome, an infarcted lesion was detected outside of the medulla oblongata on an MRI T2 weighted image, and a thrombus was depicted inside the right vertebral artery on an MRI T1 weighted image. Cerebral angiography revealed occlusion and aneurysm dilation of the right vertebral artery. Operation was performed under the diagnosis of a dissecting aneurysm of the right vertebral artery. After treatment, consisting of proximal clipping of the right vertebral artery and anticoagulation therapy, a favorable prognosis was obtained. Although several authors have recently reported dissecting aneurysm of the vertebral artery as a case of W allenberg's syndrome accompanying headache, the onset mode of the headache varied case by case. Twenty cases of this type of dissecting aneurysm found in the literature are also discussed.
