The exact mechanism of pathogenesis is unknown, but it is hypothesized that<unk>  may exacerbate existing autoimmune disorders or that phagocytosis of<unk>  by alveolar macrophages may cause dysfunction in the macrophages.
Indium lung
Lung cavity
Pleural cavity
Burst lobe
Pulmonary bay
Lung
Thoracic inlet
Subclavian loop