Table 1.

Classification of diffuse alveolar hemorrhage in young infants.

Classification	Disorders
Immune Disorders (Not Common)	Idiopathic pulmonary capillaritis Wegener's granulomatosis Microscopic polyangiitis Behcet's syndrome Goodpasture's syndrome Henoch-Schönlein purpura Churg-Strauss syndrome Cryoglobulinemia Systemic lupus erythematosus Polyarteritis nodosa Sclerodermitis IgA nephropathy Antiphospholipid antibody syndrome Polymyositis
Non-immune Disorders (More Common) Non-cardiovascular Origins:	Idiopathic pulmonary hemosiderosis Heiner syndrome Celiac disease (Lane-Hamilton syndrome) Infections Coagulation disorders Infanticide Drugs and toxines
Cardiovascular Causes:	Mitral stenosis Pulmonary veno-occlusive disease Arteriovenous malformations Pulmonary hypertension Pulmonary capillary hemangiomatosis Chronic right heart failure