989 Primary angiitis of the central nervous system (PACNS) refers to vasculitis limited to the brain, spinal cord, and meninges without any secondary etiology. It is a rare disease, with… Click to show full abstract
989 Primary angiitis of the central nervous system (PACNS) refers to vasculitis limited to the brain, spinal cord, and meninges without any secondary etiology. It is a rare disease, with one study estimating the average annual incidence rate of PACNS to be 2.4 cases per 1,000,000 personâyears.[1] The disease can affect people of any age but usually occurs in the fourth or fifth decades of life.[2]
               
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