title: Osteonecrosis of the jaw in patients with bone metastases treated with bisphosphonates: a retrospective study.
abstract: OBJECTIVE
  Bone metastases are a major cause of morbidity in cancer patients. Treatment includes bisphosphonates, which are also associated with avascular osteonecrosis of the jaw (ONJ). Our aim was to evaluate the correlation between bisphosphonates and ONJ.
  
  
  METHODS
  Of the 539 patients with bone metastases treated in our department from June 2002 to December 2006 with i.v. bisphosphonates, eight (1.5%) developed ONJ.
  
  
  RESULTS
  The eight patients with ONJ had all been given zoledronic acid, and two had also been treated with pamidronic acid. In four of the patients, ONJ was diagnosed during treatment, while in the remaining four it was diagnosed several months after therapy with bisphosphonates had ended. Six of these patients received local noninvasive treatment, of whom five progressed. Two showed apparent autolimitation of the disease. The remaining two patients underwent surgical resection and currently show no signs of relapse. All eight ONJ patients presented with various concomitant risk factors such as paradontopathy, dental extraction, or spontaneous avulsion.
  
  
  CONCLUSIONS
  Our results show that ONJ can appear months after interruption of treatment and that a surgical approach can be used in suitable cases. Closer cooperation is needed among specialists to define guidelines for the prevention of ONJ in patients with bone metastases.
authors: Osteo-oncology Center and Department of Medical Oncology, Istituto Scientifico Romagnolo per lo Studio e la Cura dei Tumori, Via Maroncelli 40, 47014 Meldola, Italy.
authors: Toni
authors: T
authors: Ibrahim
authors: Francesca
authors: F
authors: Barbanti
authors: Gianluca
authors: G
authors: Giorgio-Marrano
authors: Laura
authors: L
authors: Mercatali
authors: Sonia
authors: S
authors: Ronconi
authors: Claudio
authors: C
authors: Vicini
authors: Dino
authors: D
authors: Amadori
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001859:Bone Neoplasms / Q000150:complications* / Q000188:drug therapy* / Q000556:secondary; D004164:Diphosphonates / Q000008:administration & dosage / Q000627:therapeutic use*; D005260:Female; D006801:Humans; D007568:Jaw / Q000473:pathology*; D008297:Male; D008875:Middle Aged; D009362:Neoplasm Metastasis; D010020:Osteonecrosis / Q000188:drug therapy / Q000209:etiology / Q000473:pathology*; D011379:Prognosis; D012189:Retrospective Studies; D012307:Risk Factors
chemical_list: D004164:Diphosphonates