Metastatic Neoplasm to the Spine

The purpose of this study is to compare three types of radiation therapy for cancer that has spread to the spine. The two types of radiation therapy used in this trial are External Beam Radiation Therapy (EBRT) and Stereotactic Body Radiation Therapy (SBRT). EBRT delivers tightly targeted radiation beams from outside the body. SBRT is a specialized type of radiation therapy that allows high doses of radiation to small targets. This study will include standard dose SBRT and higher dose SBRT. Each participant will be randomly assigned to either EBRT, standard dose SBRT, or higher dose SBRT.