Following will cause CNS-vasculitis except -

CNS Vasculitis is vasculitis involving the vessels of the brain and occasionally the spinal cord. Causes of CNS vasculitis A. Primary angiitis of CNS (PACNS) If there is no underlying cause. Also known as granulomatous angiitis of the nervous system. B. Secondary When CNS vasculitis is due to some underlying disease, eg:- Behcet's disease PAN Wegener's granulomatosis Connective tissue disorders - SLE, RA Cancer - lymphoma, leukaemia, lung cancer Drugs - Amphetamine, cocaine, Heroin Others - Fibromuscular dysplasia and thrombotic thrombocytopenic purpura