Vasculitis/Diffuse Alveolar Hemorrhage

Pulmonary vasculitis is characterized by inflammation and necrosis of the vasculature, commonly the capillaries.¹ Diffuse alveolar hemorrhage (DAH) is the most common manifestation of pulmonary vasculitis.¹ DAH is characterized by the widespread extravasation of red blood cells and collecting in the alveoli.^1,2