Health Economics Evaluation of Percutaneous Vertebroplasty Compared to Radiation Therapy in Patients With Painful Spine Metastases.

The purpose of this study is to evaluate cost-utility analysis in order to provide recommendations to French decision-makers between vertebroplasty and radiation therapy in Bone spine metastases. Indeed, radiation therapy is often advocated a systematic way. The object of this study would be to expand the use of vertebroplasty. Moreover, this study assess to the strategy impact on the pain control reduction and functional preservation. In fact, analgesic effect is achieved differently depending on the procedure used.Eligible patients will be recruited and registered consecutively. Patients will be randomly, This is a health-economic multicenter, prospective, randomized with stratification according to number of vertebrae to treat (1-3 vertebrae vs 4-6 vertebrae) and center : * Arm A: Percutaneous vertebroplasty * Arm B: External radiotherapy This is an open-label study. The expected total study period is 2.5 years (enrolment: 2 years, patient follow-up: 6 months). A total number of 304 patients with spine metastases will be recruited (152 patients/arm).