title: [Extrinsic allergic alveolitis in children. Apropos of 4 cases].
abstract: Four cases of extrinsic allergic alveolitis are reported. About them, we discuss: The difficulties of diagnosis that we can only affirm on the association of several clinical, biological, and radiological arguments. The physiopathology: association of immune complex hypersensitivity type III and immediate hypersensitivity type I. It's important to always search for a probable starting infectious factor (mycoplasma). The therapy: antigenic exclusion is the only way to avoid a lung fibrosis.
mesh_terms: D000293:Adolescent; D000305:Adrenal Cortex Hormones / Q000627:therapeutic use; D000542:Alveolitis, Extrinsic Allergic / Q000175:diagnosis* / Q000276:immunology / Q000503:physiopathology / Q000628:therapy; D002648:Child; D002675:Child, Preschool; D003937:Diagnosis, Differential; D005500:Follow-Up Studies; D006801:Humans; D006942:Hypergammaglobulinemia / Q000209:etiology; D007136:Immunoglobulins / Q000032:analysis; D007223:Infant; D008297:Male; D011233:Precipitin Tests; D012129:Respiratory Function Tests
chemical_list: D000305:Adrenal Cortex Hormones; D007136:Immunoglobulins
vernacular_title: Alvéolites allergiques extrinsèques chez l'enfant. A propos de 4 observations.