title: "Histiocytosis".
mesh_terms: D006644:Histiocytes / Q000648:ultrastructure; D006646:Histiocytosis, Langerhans-Cell / Q000473:pathology; D006801:Humans; D007153:Immunologic Deficiency Syndromes / Q000473:pathology; D007223:Infant; D008206:Lymphatic Diseases / Q000473:pathology*; D008264:Macrophages / Q000502:physiology; D009626:Terminology as Topic