title: Taking the X out of histiocytosis X.
authors.forename: S S
authors.initials: SS
authors.lastname: Siegelman
mesh_terms: D005858:Germany; D006644:Histiocytes / Q000145:classification; D006646:Histiocytosis, Langerhans-Cell / Q000000981:diagnostic imaging / Q000266:history / Q000473:pathology; D049672:History, 19th Century; D049673:History, 20th Century; D006801:Humans; D007801:Langerhans Cells; D017563:Lung Diseases, Interstitial / Q000000981:diagnostic imaging / Q000473:pathology; D011859:Radiography