510 When Does the Global Alignment and Proportion (GAP) Score Fail?: Comprehensive Assessment of Mechanical and Junctional Failure in Patients Meeting Post-Operative Global Alignment and Proportionality Targets

e558 Identifying Factors Associated with Disability and Outcomes of Adult Spinal Patients with Severe Sagittal Malalignment and Insufficient Pelvic Compensation at Presentation ♢

e575 At What Point Does Degenerative Become Deformity: When Sagittal Correction Influences Clinical Improvement in Adult Cervical Deformity Surgery