[Histiocytosis X of the jaws. Apropos 5 cases]

Principal features of histiocytosis X are discussed in relation to 5 cases treated in the department. Clinical signs are known. Bone scintiscans are of importance for evaluation of extension of the disease. Surgical treatment is the rule until more effective therapy becomes available and has a diagnostic rather than curative aim. The major problem remains the progressive dental mutilation.