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
ANCA positive vasculitis is
assistant
The correct answer is  Wegener granulomatosis is likely to be initiated as a cell mediated hypersensitivity response directed aganist inhaled infectious or environmental antigens. PR3-ANCA are present in almost 95 c/o of cases Chrug - stauss syndrome is a small vessel necrotising vasculitis classically associated with asthma, allergic rhinitis, lung infiltrate, etc. This syndrome may stem from hyperresponsiveness to normally innocuous allergic stimuli. MPO-ANCA s are present in a minority of cases Robbins 9 th edition page no. 354