Interstitial Lung Diseases: A Historical Note -- Definition, Classification, and Clinical Features -- Radiology and Nuclear Imaging in Interstitial Lung Disease -- Sarcoidosis -- to Idiopathic Interstitial Pneumonias -- Idiopathic Pulmonary Fibrosis -- Respiratory Bronchiolitis Associated Interstitial Lung Disease and Desquamative Interstitial Pneumonia -- Nonspecific Interstitial Pneumonia -- Bronchiolitis Obliterans Organizing Pneumonia -- Acute Interstitial Pneumonia -- Lymphoid Interstitial Pneumonia -- Eosinophilic Interstitial Lung Disease -- Drug-induced Lung Diseases -- Radiation-induced Lung Diseases -- Drug Addict’s Lung -- Hypersensitivity Pneumonitis -- Pneumoconioses -- Inhalation Fever and Chemical Pneumonitis -- Pulmonary Involvement in Rheumatoid Arthritis -- Systemic Sclerosis and the Lung -- Systemic Lupus Erythematosus and the Lung -- Polymyositis/Dermatomyositis and the Lung -- Sjögren Syndrome and the Lung -- Wegener Granulomatosis -- Microscopic Polyangiitis -- Churg-Strauss Syndrome -- Goodpasture Disease -- Two Vascular Multisystem Diseases with Pulmonary Involvement -- Idiopathic Pulmonary Hemosiderosis -- Pulmonary Alveolar Microlithiasis -- Pulmonary Alveolar Proteinosis -- Lymphangioleiomyomatosis -- Pulmonary Langerhans Cell Histiocytosis -- Paraproteinemias -- Liver-Lung Relationship -- Lungs and Gastrointestinal System -- Cancer in Interstitial Lung Disease.