Diffuse alveolar hemorrhage

Etiology

Immune causes

• Goodpasture's syndrome
• Systemic lupus erythematosus
• Wegener's granulomatosis
• Systemic necrotizing vasculitis
• Pulmonary capillaritis associated with idiopathic rapidly progressive glomerulonephritis

Nonimmune causes

• Coagulopathy
• Mitral stenosis
• Necrotizing pulmonary infection (eg, aspergillosis, cytomegalovirus, herpes simplex virus)
• Idiopathic pulmonary hemosiderosis
• Recent bone marrow transplant
• Drugs (penicillamine)
• Toxins (trimellitic anhydride)