Granulomatosis with Polyangiitis (Wegener's Granulomatosis): Evolving Concepts in Treatment

Granulomatosis with polyangiitis (GPA), formerly termed Wegener's granulomatosis, is the most common of the pulmonary vasculitides. GPA typically involves the upper respiratory tract, lower respiratory tract (bronchi and lung), and kidney, with varying degrees of disseminated vasculitis. Cardinal histologic features include a necrotizing vasculitis involving small vessels, extensive “geographic” necrosis, and granulomatous inflammation. The...