Non-specific systemic necrotizing small vasculitis

Nonspecific systemic small vessel necrotizing vasculitis SVN, also known as microscopic polyarteritis under microscopy, is now internationally known as microscopic polyangiitis MPA ), It is a more common type of necrotizing vasculitis. Its incidence is second only to Wegener's granulomatous disease in vasculitis. In 1994, Jennette proposed a new type of blood vessels based on whether ANCA was positive in patients with necrotizing vasculitis. Inflammation-ANCA-associated vasculitis, which includes Wegener's granulomatosis, microvasculitis and Churg-Strauss syndrome, this concept has been widely accepted by experimental studies at home and abroad. It has become a hot topic in vasculitis research at home and abroad, because according to a British study, 50% of all necrotizing vasculitis cases are ANCA-associated vasculitis, and some foreign experts have developed new diagnostic criteria.