Interstitial pneumonias (acute, lymphocytic)
Lung malignancy
Aspiration pneumonia or pneumonitis
Bacterial, viral, or fungal pneumonia
Cryptogenic organizing pneumonia
Interstitial lung disease associated with collagen vascular disease
Drug-induced<unk>  toxicity (amiodarone, bleomycin, amphotericin B, carbamazepine, etc.)
Eosinophilic granuloma (Histiocytosis X)
Radiation pneumonitis
Sarcoidosis
Pneumoconiosis (Workplace exposure)
Asbestosis
Berylliosis
Chemical worker's lung
Coal worker's pneumoconiosis
Silicosis
Asbestosis
Berylliosis
Chemical worker's lung
Coal worker's pneumoconiosis
Silicosis
Idiopathic pulmonary fibrosis
Interstitial pneumonias 
Bronchiectasis
Lung malignancy
Sarcoidosis
Aspiration pneumonia or pneumonitis
CMV pneumonia
Bacterial, viral, or fungal pneumonia