It has been suggested that idiopathic<unk>  has an autoimmune mechanism, and is a possible complication of undifferentiated connective tissue disease; however, not enough research has been done at this time to find a cause. Patients with<unk>  will often have other unrelated lung diseases like COPD or emphysema, along with other auto-immune disorders.
Non-specific interstitial pneumonia
Lymphocytic interstitial pneumonia
Desquamative interstitial pneumonia
Usual interstitial pneumonia
Multifocal micronodular pneumocyte hyperplasia
Granulomatous–lymphocytic interstitial lung disease
Diffuse alveolar damage
Pulmonary alveolar microlithiasis