？Alteraciones maxilofaciales en Histiocitosis de Células de Langerhans: Reporte de un caso？.

langerhans cell histiocytosis, known earlier as histiocytosis x is a term applied to a group of rare disorders of the reticuloendothelial system, characterized？ by an abnormal proliferation of langerhans cells derived from bone marrow. the purpose of this research is to report the maxillofacial alterations of a patient with diagnostic of langerhans cell histiocytosis. a three-year old male patient with diagnostic of langerhans cell histiocytosis with multifocal bone involvement and special sites of disease is presented. he had a previous history of exophtalmus, recurrent suppurative otitis media, diabetes insipidus, seborrheic dermatitis and hyperchromic lesions in lower members. the extraoral exam showed erythematosus and desquamative lesions in face skin and the scalp, intraorally back teeth mobility of both maxilars was found together with gingival recession, dental caries and premature eruption of 26. radiographically, he presented osteolitic lesions in the sphenoid major wings, left orbital roof, right external orbital wall, zygomatic arch, temporal bone and back areas of both maxilars, besides dental germ agenesia of 35 and 45. in addition to the systemic chemiotherapy treatment, a control of the dentobacterial infection and surgical treatment of the affected maxillary areas was made. the conclusion is that maxilars as well as the skull bones must be evaluated in patients with a diagnostic of langerhans cell histiocytocis, because this could be the only bone involvement to be found as it happened in this case.