title: Histiocytosis-X Letterer-Siwe syndrome.
mesh_terms: D002675:Child, Preschool; D005260:Female; D006646:Histiocytosis, Langerhans-Cell / Q000000981:diagnostic imaging*; D006801:Humans; D011860:Radiography, Abdominal; D012886:Skull / Q000000981:diagnostic imaging