Prediction of Proximal Junctional Kyphosis and Failure After Corrective Surgery for Adult Spine Deformity: An MRI-Based Model Combining Bone and Paraspinal Muscle Quality Metrics

Proximal junctional kyphosis (PJK) and proximal junctional failure (PJF) are common complications observed after adult spinal deformity (ASD) surgery and major cause for unplanned reoperations. In addition to spinal alignment, osteoporosis and paraspinal muscle (PSM) degeneration are reportedly indispensable factors that account for PJK/PJF.