Symptoms
Progressive exertional dyspnea
Persistent, nonproductive cough
+/- hemoptysis, pleuritic chest pain
May have history of smoking, occupational exposures (asbestosis, silicosis, grain dust, bird droppings), medications that can cause pulmonary damage, connective tissue<unk> , IBD
Physical exam
Usually nonspecific
Increased work of breathing, hypoxia
+/- Abnormal lung sounds (classically fine, "velcro-like" crackles)
Progressive exertional dyspnea
Persistent, nonproductive cough
Usually nonspecific
Increased work of breathing, hypoxia
+/- Abnormal lung sounds (classically fine, "velcro-like" crackles)
Interstitial lung disease
Interstitial pneumonias 
Pneumoconiosis
Lung malignancy
Atypical pneumonia
Aspiration pneumonia or pneumonitis
Lung transplant complications
Bacterial, viral, or fungal pneumonia