title: Extrinsic allergic alveolitis (hypersensitivity pneumonitis): immunopathology.
mesh_terms: D000542:Alveolitis, Extrinsic Allergic / Q000209:etiology / Q000276:immunology* / Q000473:pathology; D000936:Antigen-Antibody Complex / Q000276:immunology; D003167:Complement Activation; D003165:Complement System Proteins / Q000276:immunology; D006099:Granuloma / Q000209:etiology; D006801:Humans; D013601:T-Lymphocytes / Q000276:immunology
chemical_list: D000936:Antigen-Antibody Complex; D003165:Complement System Proteins