This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Vasculitis, Subject name: Pathology
[{'content': "Pathogenesis of all of the following is granulomatous inflammation, except: \nSelect and explain. \nA. Wegener's granulomatosis, B. Churg-Strauss syndrome, C. Takayasu's aeritis, D. Microscopic polyangitis", 'role': 'user'}, {'content': 'Answer: D \nExplanation: Microscopic polyangitis is characterized by segmental fibrinoid necrosis of the media with focal transmural necrotizing lesions; granulomatous inflammation is absent.', 'role': 'assistant'}]