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Khoi D. Than, Paul Park, Kai-Ming Fu, Stacie Nguyen, Michael Y. Wang, Dean Chou, Pierce D. Nunley, Neel Anand, Richard G. Fessler, Christopher I. Shaffrey, Shay Bess, Behrooz A. Akbarnia, Vedat Deviren, Juan S. Uribe, Frank La Marca, Adam S. Kanter, David O. Okonkwo, Gregory M. Mundis Jr., Praveen V. Mummaneni and the International Spine Study Group

M invasive surgery (MIS) techniques are increasingly used in spine surgery, including in the treatment of adult spinal deformity (ASD). Such techniques include minimally invasive transpsoas retroperitoneal approaches for lateral lumbar interbody fusion (LLIF) and minimally invasive transforaminal lumbar interbody fusion (MI-TLIF). Previous work has suggested that minimally invasive spinal deformity correction is associated with fewer intraoperative complications than open or hybrid techniques 9 with comparable clinical outcomes. 2 However, with the

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Alex Soroceanu, Douglas C. Burton, Bassel Georges Diebo, Justin S. Smith, Richard Hostin, Christopher I. Shaffrey, Oheneba Boachie-Adjei, Gregory M. Mundis Jr., Christopher Ames, Thomas J. Errico, Shay Bess, Munish C. Gupta, Robert A. Hart, Frank J. Schwab, Virginie Lafage and International Spine Study Group

number is expected to increase. Adult spinal deformity (ASD) is common, and its incidence increases with age. The prevalence of ASD in the elderly population has been investigated, with Schwab et al. 56 reporting rates of ASD up to 68% in patients over the age of 65 years. Regarding ASD treatment, multiple reports have documented the superiority of surgical intervention and its potential ability to improve pain and disability, the 2 primary presenting complaints of patients with ASD. 5 , 23 , 61 , 62 However, several authors have identified high complication

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Christopher P. Ames, Justin S. Smith, Justin K. Scheer, Christopher I. Shaffrey, Virginie Lafage, Vedat Deviren, Bertrand Moal, Themistocles Protopsaltis, Praveen V. Mummaneni, Gregory M. Mundis Jr., Richard Hostin, Eric Klineberg, Douglas C. Burton, Robert Hart, Shay Bess, Frank J. Schwab and the International Spine Study Group

D espite the complexity of CSD and the substantial impact on patient quality of life, there exists no comprehensive classification system to serve as the basis of communication among physicians and to facilitate effective clinical and radiographic study of patients with these deformities. Without a standardized classification system, studies of CSD may suffer from heterogeneity that compromises the study findings and negatively impacts communication of the results. Other spinal conditions, including adult and pediatric scoliosis, spondylolisthesis, and

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Justin S. Smith, Ellen Shaffrey, Eric Klineberg, Christopher I. Shaffrey, Virginie Lafage, Frank J. Schwab, Themistocles Protopsaltis, Justin K. Scheer, Gregory M. Mundis Jr., Kai-Ming G. Fu, Munish C. Gupta, Richard Hostin, Vedat Deviren, Khaled Kebaish, Robert Hart, Douglas C. Burton, Breton Line, Shay Bess, Christopher P. Ames and The International Spine Study Group

S ubstantial improvements in surgical techniques, instrumentation, perioperative management, and reduction of risk related to comorbid conditions have broadened the indications for correction of adult spinal deformity (ASD) and have enabled correction of increasingly more complex deformities. Although data thus far seem to indicate that selected adults with spinal deformity do have significant potential for improvement with surgical treatment, overall complication rates remain high and represent areas for continued improvement 7 , 8 , 32 , 39–43 Despite

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Paul Park, Kai-Ming Fu, Praveen V. Mummaneni, Juan S. Uribe, Michael Y. Wang, Stacie Tran, Adam S. Kanter, Pierce D. Nunley, David O. Okonkwo, Christopher I. Shaffrey, Gregory M. Mundis Jr., Dean Chou, Robert Eastlack, Neel Anand, Khoi D. Than, Joseph M. Zavatsky, Richard G. Fessler and the International Spine Study Group

A dult spinal deformity (ASD) can cause significant pain and disability. When the deformity is refractory to medical management, spinal deformity surgery can effectively improve pain and function. 14 Presently, there are many options for the surgical treatment of ASD, including minimally invasive surgery (MIS). 2 , 4 , 9 , 10 , 16 , 17 The potential advantages of MIS primarily reflect a significantly diminished exposure-related morbidity resulting in decreased bleeding, length of stay, and pain, and possibly faster recovery. Initial applications of MIS for ASD

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Pooya Javidan, Nima Kabirian, Gregory M. Mundis Jr. and Behrooz A. Akbarnia

T he incidence of neurological complications after spinal deformity surgery in the pediatric population is variable between 0.35% and 1% depending on the underlying etiology of deformity (highest in congenital kyphosis) and type of surgical procedure (highest after combined anterior and posterior procedures). 3 , 8 , 11 , 14 Despite the rare incidence, the final sequelae are tragic and potentially devastating. Neurological injuries after surgery for spinal deformity may have a single or combined etiology. These include vascular, metabolic, and

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Praveen V. Mummaneni, Christopher I. Shaffrey, Lawrence G. Lenke, Paul Park, Michael Y. Wang, Frank La Marca, Justin S. Smith, Gregory M. Mundis Jr., David O. Okonkwo, Bertrand Moal, Richard G. Fessler, Neel Anand, Juan S. Uribe, Adam S. Kanter, Behrooz Akbarnia and Kai-Ming G. Fu

W ith the aging of the US population, adult degenerative scoliosis is increasing in incidence with significant impact on health and disability. 5 , 9–11 Surgical correction of adult degenerative scoliosis has traditionally been performed using open surgical approaches. Open spinal deformity correction surgery is associated with a large amount of intraoperative blood loss and significant complication rates. 6 A multicenter study from the International Spine Study Group reviewing 953 adult spinal deformity patients revealed a major complication rate of 7

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Kseniya Slobodyanyuk, Caroline E. Poorman, Justin S. Smith, Themistocles S. Protopsaltis, Richard Hostin, Shay Bess, Gregory M. Mundis Jr., Frank J. Schwab and Virginie Lafage

A dult spinal deformity (ASD) is a significant source of disability worldwide. 8 , 10 , 12 In the absence of significant or progressive neurological deficits, initial treatment is usually nonoperative, with conversion to surgery for nonresponders; the idea is that successful nonoperative management can spare the risks and pain of more invasive treatment. 9 , 20 The nonoperative approach generally consists of a combination of treatments including bracing, physical therapy and exercise, narcotic and nonnarcotic pain medications, interventional procedures

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Michael Y. Wang, Praveen V. Mummaneni, Kai-Ming G. Fu, Neel Anand, David O. Okonkwo, Adam S. Kanter, Frank La Marca, Richard Fessler, Juan Uribe, Christopher I. Shaffrey, Virginie Lafage, Raqeeb M. Haque, Vedat Deviren and Gregory M. Mundis Jr.

S urgery for adult spinal deformity (ASD) remains a challenging proposition. Several factors contribute to create a high likelihood of intraoperative and postoperative complication rates. Medical comorbidities, patient deconditioning due to pain and immobility, associated osteoporosis, a rigid skeletal deformity, and abnormal spinal anatomy all increase the likelihood of a complication from ASD surgery. 6 , 9 Furthermore, the surgical enterprise needed to destabilize, realign, and fuse the spine over multiple segments is painful and debilitating

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Justin K. Scheer, Peter G. Passias, Alexandra M. Sorocean, Anthony J. Boniello, Gregory M. Mundis Jr., Eric Klineberg, Han Jo Kim, Themistocles S. Protopsaltis, Munish Gupta, Shay Bess, Christopher I. Shaffrey, Frank Schwab, Virginie Lafage, Justin S. Smith, Christopher P. Ames and The International Spine Study Group

I ncreasingly , the management of adult spinal deformity (ASD) is considered from a global perspective. 1 , 14 , 16 , 26 The majority of literature regarding the management of ASD has focused on the thoracolumbar region with little regard for the adjacent regions. Several recent studies have demonstrated that regional spinal alignment and pathology can affect other spinal regions. These studies highlight the importance of considering the entire spine when planning for the surgical correction of ASD. Ames et al. 1 reported a significant chain of