Thomsonis Rula A. Hajj-Alia and Leonard H. Calabreseb aCenter for Vasculitis Care and Research and bRJ Fasenmyer Chair of Clinical Immunology, Department of Rheumatic and
Granulomatous AngiitisKEYWORDS KEY POINTS The vasculitides are diseases characterized by inflammation of blood vessels and inflam- matory leukocytes in vessel walls. Granulomatous