title: [Maxillary osteosarcoma. A woman with 12 years of survival].
abstract: BACKGROUND
  The osteosarcomas of the jaws are infrequently tumors. The accelerated bone growthing and the swelling with nervous sensibility alterations are suggestive of malignancy. The diagnosis is established only by the histological study and the standard treatment used is surgery with a poor survival prognosis of only 25% at five years for those cases with margins free of tumor.
  
  
  METHODS
  A female with an osteosarcoma of the jaw limited to the anterior left face of the maxillary and malar area without involve of the alveolar bone. A modified maxillectomy wasdone. Chemotherapy and radiotherapy were given after surgery. At the present, the patient is free of malignancy activity after twelve years of survival.
  
  
  CONCLUSIONS
  No matter the systemic chemotherapy in maxillar and jaw osteosarcomas is little effective, the early diagnosis and treatment was the key in the clinical evolution of the patient presented and in who the first elected treatment was surgery.
authors.affiliation: Servicio de Cirurgía Maxillofacial, Hospital General de Zona 50, Instituto Mexicano del Seguro Social, San Luis Potosí, México. gu_tato@yahoo.com
authors.forename: Gustavo S
authors.initials: GS
authors.lastname: Moctezuma-Bravo
authors.forename: Ricardo Díaz
authors.initials: RD
authors.lastname: de León-Medina
authors.forename: Francisco J
authors.initials: FJ
authors.lastname: Rodríguez-Quilantán
mesh_terms: D000328:Adult; D018572:Disease-Free Survival; D005260:Female; D006801:Humans; D008441:Maxillary Neoplasms / Q000175:diagnosis / Q000628:therapy; D012516:Osteosarcoma / Q000175:diagnosis / Q000628:therapy; D013997:Time Factors