title: Histiocytosis x.
mesh_terms: D000367:Age Factors; D001847:Bone Diseases / Q000175:diagnosis; D002648:Child; D003937:Diagnosis, Differential; D006646:Histiocytosis, Langerhans-Cell / Q000145:classification / Q000628:therapy; D006801:Humans; D010586:Phagocytes; D011379:Prognosis