Medication-related Antiarrhythmic agents (amiodarone) Antibacterial agents (nitrofurantoin, sulfonamides) Antineoplastic agents (bleomycin, cyclophosphamide, methotrexate, nitrosoureas) Antirheumatic agents (gold salts, penicillamine) Phenytoin Environmental and occupational (inhalation exposures) Dust, inorganic (asbestos, beryllium, hard metals, silica) Dust, organic (thermophilic actinomycetes, avian antigens, Aspergillus species) Gases, fumes, and vapors (chlorine, isocyanates, paraquat, sulfur dioxide) Ionizing radiation Talc (injection drug users) Infections Fungus, disseminated (Blastomyces dermatitidis, Coccidioides immitis, Histoplasma capsulatum) Mycobacteria, disseminated Pneumocystis jirovecii Viruses Primary pulmonary disorders Cryptogenic organizing pneumonia Idiopathic interstitial pneumonia: acute interstitial pneumonia, desquamative interstitial pneumonia, nonspecific interstitial pneumonia, usual interstitial pneumonia, respiratory bronchiolitis–associated interstitial lung disease Pulmonary alveolar proteinosis Systemic disorders Acute respiratory distress syndrome Amyloidosis Ankylosing spondylitis Autoimmune disease: dermatomyositis, polymyositis, rheumatoid arthritis, SLE, systemic sclerosis (scleroderma) Chronic eosinophilic pneumonia Goodpasture syndrome Granulomatosis polyangiitis IBD Idiopathic pulmonary hemosiderosis Langerhans cell histiocytosis (eosinophilic granuloma) Lymphangitic spread of cancer (lymphangitic carcinomatosis) Lymphangioleiomyomatosis Pulmonary edema Pulmonary venous hypertension, chronic Sarcoidosis |