system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
Which vasculitis affects both aerial and venous system
assistant
The correct answer is  Small vessel vasculitis affects aerioles, capillaries and venules. Of the options given, the only small vessel vasculitis is Wegener granulomatosis. (Ref: Robbins 8/e p511)