Laser Interstitial Thermal Ablation and Stereotactic Radiosurgery for Patients With Spine Metastases

Primary Objectives: 1. Documenting rate of local control in patients who have received this combined treatment and 2. Documenting safety of MRI compatible hardware for MRI based image guidance 3. Determining the accuracy of the MRI-based image guidance Secondary Objectives: 1. To determine local control at 1, 3, 6, 9, 18, and 24 months, and to compare to a historical control where patients received only SSRS at these time points and at 12 months. 2. To document the extent of epidural tumor regression at 1, 3, 6, 9, 12, 18 and 24 months * Calculate decrease in epidural tumor volume (by volumetric measurements using Brain Lab Elements software) * Calculate increase in thecal sac patency (by volumetric measurements using Brain Lab Elements software and according to Bilsky method 3. To determine overall survival at 6, 12, 18, and 24 months. 4. To assess changes in muscle strength, location and severity of spinal-related pain, sensory function, ability to ambulate, and neurological grading at 1, 3, 6, 9, 12, 18, and 24 months compared with pretreatment baselines. 5. To assess the effect of treatment on quality of life, measured at 1 month and every 3 months after with validated outcome measure tools 6. To describe adverse side effects after treatment and to descriptively correlate those effects with radiographic findings, pain control, and quality of life.