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Paul Park, Michael Y. Wang, Virginie Lafage, Stacie Nguyen, John Ziewacz, David O. Okonkwo, Juan S. Uribe, Robert K. Eastlack, Neel Anand, Raqeeb Haque, Richard G. Fessler, Adam S. Kanter, Vedat Deviren, Frank La Marca, Justin S. Smith, Christopher I. Shaffrey, Gregory M. Mundis Jr. and Praveen V. Mummaneni

, including adult spinal deformity (ASD). Anand et al. 3 initially reported the feasibility of applying several different MIS techniques to treat symptomatic lumbar scoliosis. Subsequent reports have all confirmed successful MIS treatment of ASD. 5 , 17 , 21 , 24 These studies, however, have been limited by the relatively small numbers of patients evaluated, as well as the lack of focus on sagittal alignment and spinopelvic parameters, which are factors known to significantly impact long-term disability. 12 , 18 In addition, there has been no uniform MIS technique or

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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

that the spines of patients who do the worst are not appropriately corrected in the sagittal plane and are perhaps fused into a fixed sagittal plane deformity. The increased mean SVA in both groups probably represents the limited ability to improve sagittal alignment with early MIS techniques. Similarly, the unchanged PILL mismatch in the worst group reflects a lack of sagittal alignment improvement obtained by the early MIS approaches we used. These results highlight the basis of the MISDEF algorithm we created to guide MIS versus open treatment in patients with

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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

involved either a combination of approaches, such as multilevel lateral lumbar interbody fusion (LLIF), and/or MIS transforaminal lumbar interbody fusion (TLIF) followed by percutaneous fixation or hybrid surgeries typically involving LLIF combined with open posterior surgery. However, one of the potential disadvantages of MIS is that if more advanced techniques, such as anterior column realignment, are not performed, inadequate sagittal correction is a possibility. In the treatment of spinal deformity, there is substantial evidence that sagittal alignment is correlated

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Raqeeb M. Haque, Gregory M. Mundis Jr., Yousef Ahmed, Tarek Y. El Ahmadieh, Michael Y. Wang, Praveen V. Mummaneni, Juan S. Uribe, David O. Okonkwo, Robert K. Eastlack, Neel Anand, Adam S. Kanter, Frank La Marca, Behrooz A. Akbarnia, Paul Park, Virginie Lafage, Jamie S. Terran, Christopher I. Shaffrey, Eric Klineberg, Vedat Deviren and Richard G. Fessler

Corrective Measures S2-166 – S2-181 , 2002 15 Lafage V , Ames C , Schwab F , Klineberg E , Akbarnia B , Smith J , : Changes in thoracic kyphosis negatively impact sagittal alignment after lumbar pedicle subtraction osteotomy: a comprehensive radiographic analysis . Spine (Phila Pa 1976) 37 : E180 – E187 , 2012 16 Li G , Passias P , Kozanek M , Fu E , Wang S , Xia Q , : Adult scoliosis in patients over sixty-five years of age: outcomes of operative versus nonoperative treatment at a minimum two-year follow-up . Spine (Phila Pa

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examined include presence of interbody fusion, rod diameter, rod material, age and preop sagittal alignment. Methods: A retrospective review of a multicenter, prospective ASD database was conducted. Inclusion criteria: age=18yr, ASD, no revisions between >6wk and <2yrs postop. Spinal pelvic parameters, thoracic kyphosis (TK:T2-T12) and lumbar lordosis (LL:L1-S1) were measured overall and within and outside of the instrumented segments. Changes for SVA, PT, PI-LL, TK, and LL between 6wks-2yrs postop were calculated. Of these pts, the amount of thoracic loss and TL

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30; p<0.001). Conclusions The addition of PPI seems to have a protective effect on the development of PJK. The analysis controlled for preoperative sagittal alignment as well as for correction of PI-LL. HYB was effective in restoring sagittal global alignment and cMIS in maintaining it. Neurosurg Focus Neurosurgical Focus FOC 1092-0684 American Association of Neurological Surgeons 2014.3.FOC-DSPNABSTRACTS Abstract Mayfield Clinical Science 243. Microendoscopic Decompression for Cervical Spondylotic Myelopathy

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-0684 American Association of Neurological Surgeons 10.3171/2017.3.FOC-DSPNabstracts 2017.3.FOC-DSPNABSTRACTS Charles Kuntz Scholar Award Presentations (Abstracts 104–123) 119. Laminoplasty vs. Laminectomy-Fusion for the Treatment of Cervical Myelopathy: Preliminary Results from the CSM-Study Comparing Cervical Sagittal Alignment and Clinical Outcomes Vijay Ravindra , MD, MSPH , Jill Curran , MS , Praveen V. Mummaneni , MD , Adam S. Kanter , MD , Erica Fay Bisson , MD, MPH , Robert F. Heary , MD