Pulmonary Alveolar Proteinosis

Abstract
In acquired pulmonary alveolar proteinosis, lipids and proteins accumulate within the alveoli because alveolar macrophages cannot catabolize surfactants. Surprisingly, alveolar macrophages require granulocyte–macrophage colony-stimulating factor (GM-CSF) to perform this function. Autoantibodies against GM-CSF may cause pulmonary alveolar proteinosis.

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