(HRQOL) scores. 29 Based on normative spinopelvic parameter data, corrective surgery should target a sagittal vertical axis (SVA) < 50 mm and a PT < 20°. Furthermore, good postoperative HRQOL scores are correlated with a lumbar lordosis that is within approximately 10° of the pelvic incidence. 43 Postoperative positive SVA and coronal imbalance are major risk factors for the development of adjacent segment pathology (ASP) after lumbar or lumbosacral fusion. 9 , 11 , 21 , 26 , 30 , 37 , 41 , 46 “Adjacent segment pathology” is a general term that refers to any
Dominic Maggio, Tamir T. Ailon, Justin S. Smith, Christopher I. Shaffrey, Virginie Lafage, Frank Schwab, Regis W. Haid Jr., Themistocles Protopsaltis, Eric Klineberg, Justin K. Scheer, Shay Bess, Paul M. Arnold, Jens Chapman, Michael G. Fehlings, Christopher Ames, AOSpine North America and International Spine Study Group
Shay Bess, Jeffrey E. Harris, Alexander W. L. Turner, Virginie LaFage, Justin S. Smith, Christopher I. Shaffrey, Frank J. Schwab and Regis W. Haid Jr.
of acute proximal junctional failures after surgical treatment of adult spinal deformity . Spine (Phila Pa 1976) 38 : 1008 – 1015 , 2013 10.1097/BRS.0b013e318271319c 22986834 14 Kim HJ , Lenke LG , Shaffrey CI , Van Alstyne EM , Skelly AC : Proximal junctional kyphosis as a distinct form of adjacent segment pathology after spinal deformity surgery: a systematic review . Spine (Phila Pa 1976) 37 : 22 Suppl S144 – S164 , 2012 15 Kim YJ , Bridwell KH , Lenke LG , Kim J , Cho SK : Proximal junctional kyphosis in adolescent