title: Primary pulmonary histiocytosis-X.
mesh_terms: D006646:Histiocytosis, Langerhans-Cell / Q000175:diagnosis* / Q000473:pathology / Q000628:therapy; D006801:Humans; D008168:Lung / Q000473:pathology; D008171:Lung Diseases / Q000175:diagnosis* / Q000473:pathology / Q000628:therapy