GPA and MPA are two autoimmune disorders that cause systemic vasculitis. GPA commonly affects the upper respiratory tract, the lungs, and the kidneys. MPA is marked by kidney inflammation, weight loss, skin lesions, nerve damage, and fever. Many patients with WG or MPA show no visible symptoms of
PAN, also known as systemic necrotic vasculitis, was the first recognized form of primary systemic vasculitis. PAN causes the inflammation of small- to medium-sized blood vessels, especially those supplying the nerves, skin, kidneys, gastrointestinal tract, heart, eye, and genitals. Unlike another