Primary CNS vasculitis masquerading as glioblastoma: A case report and review.

Isolated angitis of the central nervous system (IACNS)/primary angitis of central nervous system vasculitis (PACNS) is an uncommon vascular disease, sparingly presenting as an isolated inflammatory lesion on magnetic resonance imaging (MRI). The disease usually manifests as a long-drawn and progressive ischemic event. Delay in diagnosis due to focal nature of the lesion also contributes to the poor prognosis as the dismal natural history and immunosuppressive therapy.