Abstract
A 50-year-old man a continuous headache, vertigo, gait disterbance, nausea and vomiting. He was diagnosed as left side lateral medullary syndrome by vertigo, left blephaloptosis, nystagmus, dysphagia, left side discoordination, right hemisensory disturbance. Computed tomography findings had no definite abnormal region, but magnetic resonanced image had abnormal region in left lateral side of medulla oblongata. His symptoms became stable by 15 days, but 18th day from onset, he died suddenly from subarachnoid hemorrhage, due to ruptured intracranial vertebral dissecting aneurysm. Serial MRI findings were obtained during the course of his illness and the progression of the dissecting aneurysm was shown. In this case, we speculate that MRIs are useful for early diagnosis and evaluation of the intracranial vertebral artery dissecting aneurysm.
