Necrotizing vasculitis is rare. It may occur in rheumatoid arthritis and is commonly seen with systemic lupus erythematosus, polyarteritis nodosa, and scleroderma. It is very rare in children. The disorder involves inflammation of the walls of the blood vessels. The cause of the inflammation is unknown, but is likely related to autoimmune factors. The tissues become necrotic (dead). The wall of the vessel may scar and thicken. The vessel may close off (occlude), causing lack of blood flow to the tissues supplied by that blood vessel. The lack of blood flow will cause an infarction (tissue death) of the tissues. Necrotizing vasculitis may affect any blood vessel of the body, and therefore any part of the body, including the muscles, nerves, kidneys, liver, or any other area.
| 
