Wegener\'s granulomatosis (WG) is a systemic vasculitis of the medium and small arteries, venules, arterioles, and, occasionally, large arteries. Wegener\'s granulomatosis (WG) is a systemic vasculitis of the medium and small arteries, venules, arterioles, and, occasionally, large arteries. WG with triad of pathological features includes (1) systemic necrotizing angiitis, (2) necrotizing granulomatous inflammation of the respiratory tract, and (3) necrotizing glomerulonephritis. In its classic presentation, WG is a form of systemic vasculitis that primarily involves the upper and lower respiratory tracts and the kidneys. A limited form of WG has clinical findings isolated to the upper respiratory tract and the lungs.