Stereotactic Body Radiation Therapy for Posterior Element-Only Spinal Metastases: A First Report on Outcomes and Validation of Recommended Clinical Target Volume Delineation Practice

PURPOSE: Spine stereotactic body radiation therapy (SBRT) results in improved local control and pain response compared with conventional external beam radiation therapy. Consensus exists stipulating that magnetic resonance imaging-based delineation of the clinical target volume (CTV) is critical and based on spine segment sector involvement. The applicability of contouring guidelines to metastases involving the posterior elements alone remains …