Vasculitis is a group of rare diseases that cause inflammation of blood vessels. There are many types of vasculitis, such as giant cell arteritis (GCA), microscopic polyangiitis (MPA), granulomatosis with polyangiitis (GPA), eosinophilic granulomatosis with polyangiitis (EGPA or Churg-Strauss), Behçet’s, as well as others.
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