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14th Lumbar Spine Research Society Annual Scientific Meeting Oral and Poster Presentations
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doi : 10.3171/2021.3.LSRS2021abstracts
Page Range:1–103
Editorial. Interspinous spacers for lumbar stenosis: time for obsolescence?
Marjorie C. Wang and Mohammed Y. T. AlGhamdi
doi : 10.3171/2020.8.SPINE201205
Page Range:541–542
A randomized controlled trial of the X-Stop interspinous distractor device versus laminectomy for lumbar spinal stenosis with 2-year quality-of-life and cost-effectiveness outcomes
Anouk Borg, Ciaran Scott Hill, Besnik Nurboja, Giles Critchley, and David Choi
doi : 10.3171/2020.7.SPINE20880
Page Range:544–552
Lumbar spinal stenosis (LSS) is a common and debilitating condition that is increasing in prevalence in the world population. Surgical decompression is often standard treatment when conservative measures have failed. Interspinous distractor devices (IDDs) have been proposed as a safe alternative; however, the associated cost and early reports of high failure rates have brought their use into question. The primary objective of this study was to determine the cost-effectiveness and long-term quality-of-life (QOL) outcomes after treatment of LSS with the X-Stop IDD compared with surgical decompression by laminectomy.
Outcomes of decompression without fusion in patients with lumbar spinal stenosis and substantial back pain
Rachid Bech-Azeddine, S?ren Fruensgaard, Mikkel Andersen, and Leah Y. Carreon
doi : 10.3171/2020.8.SPINE20684
Page Range:553–556
The predominant symptom of lumbar spinal stenosis (LSS) is neurogenic claudication or radicular pain. Some surgeons believe that the presence of substantial back pain is an indication for fusion, and that decompression alone may lead to worsening of back pain from destabilization associated with facet resection. The purpose of this study was to determine if patients with LSS and clinically significant back pain could obtain substantial improvements in back pain after a decompression alone without fusion.
Radiologic prognostic factors of curve progression in early degenerative lumbar scoliosis
Jin-Sung Park, Se-Jun Park, Chong-Suh Lee, Tae-hoon Yum, and Bo-Taek Kim
doi : 10.3171/2020.7.SPINE20266
Page Range:557–563
Several radiological parameters related to the aging spine have been reported as progression factors of early degenerative lumbar scoliosis (DLS). However, it has not been determined which factors are the most important. In this study the authors aimed to determine the risk factors associated with curve progression in early DLS.
Clinical and radiological results of indirect decompression after anterior lumbar interbody fusion in central spinal canal stenosis
Dong Hyun Lee, Dong-Geun Lee, Jin Sub Hwang, Jae-Won Jang, Dae Hyeon Maeng, and Choon Keun Park
doi : 10.3171/2020.7.SPINE191335
Page Range:564–572
Whereas the benefits of indirect decompression after lateral lumbar interbody fusion are well known, the effects of anterior lumbar interbody fusion (ALIF) have not yet been verified. The purpose of this study was to evaluate the clinical and radiological effects of indirect decompression after ALIF for central spinal canal stenosis. In this report, along with the many advantages of the anterior approach, the authors share cases with good outcomes that they have encountered.
Microendoscopic decompression for lumbar spinal stenosis caused by facet-joint cysts: a novel technique with a cyst-dyeing protocol and cohort comparison study
Shizumasa Murata, Akihito Minamide, Masanari Takami, Hiroshi Iwasaki, Sae Okada, Kento Nonaka, Hiroshi Taneichi, Andrew J. Schoenfeld, Andrew K. Simpson, and Hiroshi Yamada
doi : 10.3171/2020.8.SPINE201209
Page Range:573–579
Facet cysts may represent a sign of intrinsic facet disease and instability, increasing the importance of less-invasive approaches that limit tissue dissection and improve visualization. The authors developed an intraoperative cyst-dyeing technique, involving the injection of indigo carmine from the facet joint into the cyst, as an adjunct during decompression. This study aimed to evaluate the clinical outcomes and perioperative complication rates of microendoscopic spinal decompression for lumbar spinal stenosis (LSS) and lumbar foraminal stenosis (LFS), caused by facet cysts and to elucidate the efficacy of the cyst-dyeing method in microendoscopic surgery for facet cysts.
Patient-specific prediction model for clinical and quality-of-life outcomes after lumbar spine surgery
Daniel Lubelski, James Feghali, Amy S. Nowacki, Vincent J. Alentado, Ryan Planchard, Kalil G. Abdullah, Daniel M. Sciubba, Michael P. Steinmetz, Edward C. Benzel, and Thomas E. Mroz
doi : 10.3171/2020.8.SPINE20577
Page Range:580–588
Patient demographics, comorbidities, and baseline quality of life (QOL) are major contributors to postoperative outcomes. The frequency and cost of lumbar spine surgery has been increasing, with controversy revolving around optimal management strategies and outcome predictors. The goal of this study was to generate predictive nomograms and a clinical calculator for postoperative clinical and QOL outcomes following lumbar spine surgery for degenerative disease.
Can we use shorter constructs while maintaining satisfactory sagittal plane alignment for adult spinal deformity?
Hiroshi Moridaira, Satoshi Inami, Daisaku Takeuchi, Haruki Ueda, Hiromichi Aoki, Takuya Imura, and Hiroshi Taneichi
doi : 10.3171/2020.7.SPINE20917
Page Range:589–596
Issues with spinopelvic fixation for adult spinal deformity (ASD) include loss of the physiological mobility of the entire lumbar spine, perioperative complications, and medical costs. Little is known about the factors associated with successful short fusion for ASD. The authors evaluated radiographic and clinical outcomes after shorter fusion for different subtypes of ASD at 2 years postoperatively and examined factors associated with successful short fusion.
Simultaneous translation on two rods improves the correction and apex translocation in adolescent patients with hypokyphotic scoliosis
Daisuke Sakai, Jordy Schol, Akihiko Hiyama, Hiroyuki Katoh, Masahiro Tanaka, Masato Sato, and Masahiko Watanabe
doi : 10.3171/2020.8.SPINE201232
Page Range:597–607
The objectives of this study were to apply the simultaneous translation on two rods (ST2R) maneuver involving rods contoured with a convexity at the desired thoracic kyphosis (TK) apex level and to assess the effects on the ability to support triplanar deformity corrections, including TK apex improvement, in patients with hypokyphotic adolescent idiopathic scoliosis (AIS).
Posterior-only versus combined anterior-posterior fusion in Scheuermann disease: a systematic review and meta-analysis
Chang-Hyun Lee, Young II Won, Young San Ko, Seung Heon Yang, Chi Heon Kim, Sung Bae Park, and Chun Kee Chung
doi : 10.3171/2020.7.SPINE201062
Page Range:608–616
Combined anterior-posterior (AP) surgery is considered the gold standard for surgical treatment of Scheuermann kyphosis. There are trends toward posterior-only (PO) surgery for correcting this deformity because of the availability of multisegmental compression instruments and posterior shortening osteotomy. To date, surgical strategies for Scheuermann kyphosis remain controversial. The purpose of this study was to compare various surgical approaches for the treatment of Scheuermann kyphosis, including radiological correction and intraoperative outcomes, using a systematic review and meta-analysis.
Change in pelvic incidence between the supine and standing positions in patients with bilateral sacroiliac joint vacuum signs
Anthony L. Mikula, Jeremy L. Fogelson, Soliman Oushy, Zachariah W. Pinter, Pierce A. Peters, Kingsley Abode-Iyamah, Arjun S. Sebastian, Brett Freedman, Bradford L. Currier, David W. Polly, and Benjamin D. Elder
doi : 10.3171/2020.8.SPINE20742
Page Range:617–622
Pelvic incidence (PI) is a commonly utilized spinopelvic parameter in the evaluation and treatment of patients with spinal deformity and is believed to be a fixed parameter. However, a fixed PI assumes that there is no motion across the sacroiliac (SI) joint, which has been disputed in recent literature. The objective of this study was to determine if patients with SI joint vacuum sign have a change in PI between the supine and standing positions.
Institutional review of the management of type II odontoid fractures: associations and outcomes with fibrous union
Christopher Wilson, Mariana Hoyos, Andrew Huh, Blake Priddy, Stephen Avila, Stephen Mendenhall, Miracle C. Anokwute, George J. Eckert, and David W. Stockwell
doi : 10.3171/2020.8.SPINE20860
Page Range:623–631
Type II odontoid fractures may be managed operatively or nonoperatively. If managed with bracing, bony union may never occur despite stability. This phenomenon is termed fibrous union. The authors aimed to determine associations with stable fibrous union and compare the morbidity of patients managed operatively and nonoperatively.
Cerebrospinal fluid biomarkers of glial and axonal injury in cervical spondylotic myelopathy
Parmenion P. Tsitsopoulos, Ulrika Holmstr?m, Kaj Blennow, Henrik Zetterberg, and Niklas Marklund
doi : 10.3171/2020.8.SPINE20965
Page Range:632–641
Degenerative cervical spondylotic myelopathy (CSM) is a major cause of spinal cord dysfunction with an unpredictable prognosis. ?iomarkers reflecting pathophysiological processes in CSM have been insufficiently investigated. It was hypothesized that preoperative cerebrospinal fluid (CSF) biomarker levels are altered in patients with CSM and correlate with neurological status and outcome.
Cauda equina syndrome secondary to portal vein thrombosis: case report of favorable outcome with conservative treatment
Alberto Campione, Gianluca Agresta, Davide Locatelli, and Fabio Pozzi
doi : 10.3171/2020.7.SPINE20625
Page Range:642–647
Epidural varicosis is a rare though well-known cause of cauda equina syndrome (CES). Although inferior vena cava (IVC) obstruction is the most common finding in such cases, portal vein hypertension can lead to epidural venous plexus engorgement by means of lumbar portocaval shunt activation.
Association of intravenous administration of human Muse cells with deficit amelioration in a rat model of spinal cord injury
Takumi Kajitani, Toshiki Endo, Naoya Iwabuchi, Tomoo Inoue, Yoshiharu Takahashi, Takatsugu Abe, Kuniyasu Niizuma, and Teiji Tominaga
doi : 10.3171/2020.7.SPINE20293
Page Range:648–655
Multilineage-differentiating stress-enduring (Muse) cells are pluripotent stem cells, which can be harvested from the bone marrow. After transplantation, Muse cells can migrate to an injured site of the body and exert repair effects. However, it remains unknown whether Muse cell transplantation can be an effective treatment in spinal cord injury (SCI).
Impact of intrawound vancomycin powder on prevention of surgical site infection after posterior spinal surgery
Hiroki Ushirozako, Tomohiko Hasegawa, Yu Yamato, Go Yoshida, Tatsuya Yasuda, Tomohiro Banno, Hideyuki Arima, Shin Oe, Yuki Mihara, Tomohiro Yamada, Koichiro Ide, Yuh Watanabe, Keichi Nakai, Takaaki Imada, and Yukihiro Matsuyama
doi : 10.3171/2020.8.SPINE20992
Page Range:656–664
Surgical site infection (SSI) after posterior spinal surgery is one of the severe complications that may occur despite administration of prophylactic antibiotics and the use of intraoperative aseptic precautions. The use of intrawound vancomycin powder for SSI prevention is still controversial, with a lack of high-quality and large-scale studies. The purpose of this retrospective study using a propensity score–matched analysis was to clarify whether intrawound vancomycin powder prevents SSI occurrence after spinal surgery.
Survival, fusion, and hardware failure after surgery for spinal metastatic disease
Timothy J. Yee, Yamaan S. Saadeh, Michael J. Strong, Ayobami L. Ward, Clay M. Elswick, Sudharsan Srinivasan, Paul Park, Mark E. Oppenlander, Daniel E. Spratt, William C. Jackson, and Nicholas J. Szerlip
doi : 10.3171/2020.8.SPINE201166
Page Range:665–672
Decompression with instrumented fusion is commonly employed for spinal metastatic disease. Arthrodesis is typically sought despite limited knowledge of fusion outcomes, high procedural morbidity, and poor prognosis. This study aimed to describe survival, fusion, and hardware failure after decompression and fusion for spinal metastatic disease.
Reintervention rate of arachnolysis versus shunting for nonforaminal syringomyelia
Gonzague Guillaumet, Nozar Aghakhani, Silvia Morar, Razvan Copaciu, Fabrice Parker, and Steven Knafo
doi : 10.3171/2020.8.SPINE20928
Page Range:673–679
Surgical treatment for nonforaminal syringomyelia related to spinal arachnoiditis is still controversial. The authors sought to assess respective outcomes and rates of reintervention for shunting and spinal cord untethering (arachnolysis) in spinal arachnoiditis with syringomyelia.
Experience with an Enhanced Recovery After Spine Surgery protocol at an academic community hospital
Robert Young, Ethan Cottrill, Zach Pennington, Jeff Ehresman, A. Karim Ahmed, Timothy Kim, Bowen Jiang, Daniel Lubelski, Alex M. Zhu, Katherine S. Wright, Donna Gavin, Alyson Russo, Marie N. Hanna, Ali Bydon, Timothy F. Witham, Corinna Zygourakis, and Nicholas Theodore
doi : 10.3171/2020.7.SPINE20358
Page Range:680–687
Enhanced Recovery After Surgery (ERAS) protocols have rapidly gained popularity in multiple surgical specialties and are recognized for their potential to improve patient outcomes and decrease hospitalization costs. However, they have only recently been applied to spinal surgery. The goal in the present work was to describe the development, implementation, and impact of an Enhanced Recovery After Spine Surgery (ERASS) protocol for patients undergoing elective spine procedures at an academic community hospital.
Letter to the Editor. Suggested addition to the classification system for multirod constructs
Asham Khan, John Pollina, and Jeffrey P. Mullin
doi : 10.3171/2020.10.SPINE201858
Page Range:688–689
