Pathogenesis of all of the following is granulomatous inflammation, except:: (A) Wegener's granulomatosis, (B) Churg-Strauss syndrome, (C) Takayasu's aeritis, (D) Microscopic polyangitis
Answer is D. Microscopic polyangitis is characterized by segmental fibrinoid necrosis of the media with focal transmural necrotizing lesions; granulomatous inflammation is absent.