title: Pulmonary histiocytosis X.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D002675:Child, Preschool; D005260:Female; D006646:Histiocytosis, Langerhans-Cell / Q000175:diagnosis / Q000473:pathology* / Q000628:therapy; D006801:Humans; D007223:Infant; D008168:Lung / Q000473:pathology / Q000648:ultrastructure; D008171:Lung Diseases / Q000175:diagnosis / Q000473:pathology* / Q000628:therapy; D008297:Male; D008875:Middle Aged