Musculoskeletal Key

The epidemiology of the antineutrophil cytoplasm antibody (ANCA)-associated vasculitides (AAV), comprising Wegener’s granulomatosis, microscopic polyangiitis, and Churg-Strauss syndrome, poses considerable challenges to epidemiologists. These challenges include the difficulty of defining…

An essential early step toward understanding vasculitis was recognition in 1948 of the differences between the small artery disease of polyarteritis, essentially sparing the glomerulus and lungs, and disease of…