๐ ็ธฝ็ฎ้ ๏ฝ ๐ ่ฑๆๅๆ๏ผๆฌ็ฏ๏ผ ๏ฝ ๐ ๅฎๆด็ฟป่ญฏ ๏ฝ โญ ็ฒพ่ฏ็ญ่จ
EPIDEMIOLOGY
The annual population-based incidence of biopsy-proven LCV is ~45 per million. Of note, this figure includes various subtypes such as urticarial vasculitis, cryoglobulinemic vasculitis, and ANCA-associated vasculitis, any of which may demonstrate LCV histologically. Cutaneous vasculitis occurs in all age groups (mean age in adults, 47 years; mean age in children, 7 years), has a slight female predominance, and is much more common in adults than in children. The most common type of vasculitis in children is IgA vasculitis (HenochโSchรถnlein purpura).