title: [Value of the ultrastructural study of gingival biopsy in the diagnosis of histiocytosis X].
mesh_terms: D001706:Biopsy; D002467:Cell Nucleus / Q000648:ultrastructure; D003593:Cytoplasm / Q000648:ultrastructure; D004847:Epithelial Cells; D004848:Epithelium / Q000648:ultrastructure; D005881:Gingiva / Q000473:pathology / Q000648:ultrastructure*; D006644:Histiocytes / Q000648:ultrastructure; D006646:Histiocytosis, Langerhans-Cell / Q000473:pathology*; D006801:Humans; D007223:Infant; D007801:Langerhans Cells / Q000648:ultrastructure
vernacular_title: Intérêt de l'étude ultrastructurale d'une biopsie gingivale dans le diagnostic de l'histiocytose X