title: Interstitial lung diseases of unknown cause. Disorders characterized by chronic inflammation of the lower respiratory tract.
mesh_terms: D000936:Antigen-Antibody Complex; D001706:Biopsy; D003165:Complement System Proteins / Q000276:immunology; D006646:Histiocytosis, Langerhans-Cell / Q000175:diagnosis / Q000276:immunology / Q000473:pathology / Q000628:therapy; D006801:Humans; D007694:Killer Cells, Natural / Q000276:immunology; D008214:Lymphocytes / Q000276:immunology; D008264:Macrophages / Q000276:immunology / Q000473:pathology; D011650:Pulmonary Alveoli / Q000473:pathology*; D011658:Pulmonary Fibrosis / Q000209:etiology* / Q000473:pathology; D012507:Sarcoidosis / Q000175:diagnosis / Q000276:immunology; D012907:Smoking; D013601:T-Lymphocytes / Q000276:immunology
chemical_list: D000936:Antigen-Antibody Complex; D003165:Complement System Proteins