202 results match your criteria Pars Interarticularis Injury


Percutaneous Endoscopic Transforaminal Approach for Far Lateral Lumbar Discectomy: 2-Dimensional Operative Video.

Oper Neurosurg (Hagerstown) 2019 Mar 19. Epub 2019 Mar 19.

Department of Neurosurgery, Nanoori Incheon Hospital, Incheon, Republic of Korea.

The conventional surgical approach to far lateral lumbar disk herniations is a paraspinal Wiltse approach. During the Wiltse approach, it is sometimes necessary to resect some of the facet or pars interarticularis to achieve an adequate exposure. The endoscopic transforaminal route can be of benefit in far lateral disk herniations due to direct access to the epidural space through Kambin's triangle, without the need for any bony removal or nerve retraction. Read More

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http://dx.doi.org/10.1093/ons/opz037DOI Listing
March 2019
2 Reads

Spondylolysis 2019 update.

Curr Opin Pediatr 2019 Feb;31(1):61-68

Washington University in St. Louis, St. Louis, Missouri, USA.

Purpose Of Review: Provide a comprehensive overview of lumbar spondylolysis, a frequent cause of lower back pain in children and adolescents, from evaluation to management.

Recent Findings: With the surge of structured sports participation in the pediatric population, spondylolysis is a common ailment that afflicts many young athletes due to rigorous competition that taxes the growing spine with repetitive extension and rotation.

Summary: Spondylolysis is a fracture through the pars interarticularis. Read More

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http://dx.doi.org/10.1097/MOP.0000000000000706DOI Listing
February 2019
5 Reads

Pars interarticularis injury in elite athletes - The role of imaging in diagnosis and management.

Eur J Radiol 2018 Nov 1;108:28-42. Epub 2018 Sep 1.

Fortius Clinic, 17 Fitzhardinghe Street, London W1H 6EQ, United Kingdom. Electronic address:

Injuries of the lumbar neural arch, in particular the pars interarticularis, are widely considered to be due to abnormal bone stress secondary to repetitive loading/shearing, and are a common pathology and a main cause of lower back pain in elite athletes across a range of sports. Medical imaging plays a pivotal role in the diagnosis, monitoring and prognostication of neural arch injury. Early detection is highly desirable in the young elite athlete, as early injuries have been shown to require shorter recovery time and have a higher potential of full healing, whilst accurate grading of injury allows appropriate rehabilitation planning. Read More

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https://linkinghub.elsevier.com/retrieve/pii/S0720048X183030
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http://dx.doi.org/10.1016/j.ejrad.2018.08.029DOI Listing
November 2018
26 Reads

High Sacral Endplate Inclination Vector Forces Are Associated with Pars Fracture-Mediated Lumbosacral Spondylolisthesis.

World Neurosurg 2019 Feb 1;122:e790-e794. Epub 2018 Nov 1.

Department of Neurosurgery, Harvard Medical School, Boston, Massachusetts, USA. Electronic address:

Objective: Lumbar spondylolisthesis can be related to facet arthropathy and disc degeneration or to a fracture of the pars interarticularis, but the mechanistic underpinnings of spondylolisthesis remain unclear. We posit that high sacral slope and body weight increase sacral inclination vector forces, which leads to pars fractures and exacerbates risk for spondylolisthesis.

Methods: To investigate this hypothesis, we measured the sacral slope, body weight, and S1 endplate vector forces for patients who underwent L5-S1 fusion for grade I spondylolisthesis. Read More

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http://dx.doi.org/10.1016/j.wneu.2018.10.148DOI Listing
February 2019
3 Reads

Hangman's Fracture Caused by Parachute Opening Deceleration Captured on Video.

World Neurosurg 2018 Nov 24;119:389-393. Epub 2018 Aug 24.

Department of Neurosurgery Charité University Hospital, Berlin, Germany. Electronic address:

Background: Nonlethal cervical spine injuries in skydiving are rare due to the associated high mortality. Here, we report an unusual pathomechanism leading to a Hangman fracture in a semiprofessional parachute athlete.

Case Description: The moment of injury was captured on a first-person video and identified as a rough parachute opening deceleration during canopy deployment, caused by failure of the parachute inflation control device. Read More

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http://dx.doi.org/10.1016/j.wneu.2018.08.089DOI Listing
November 2018
17 Reads

Individual Surgical Strategy Using Posterior Lag Screw-Rod Technique for Unstable Atypical Hangman's Fracture Based on Different Fracture Patterns.

World Neurosurg 2018 Nov 9;119:e848-e854. Epub 2018 Aug 9.

Department of Operating Room and Anesthesiology, West China Hospital, Sichuan University, Chengdu, China.

Objective: The literature on surgical management of atypical hangman's fracture (AHF) is sparse. The aim of this study was to describe an individual surgical strategy using a lag screw-rod technique for treatment of unstable AHF based on different fracture patterns.

Methods: A retrospective analysis of 23 patients with unstable AHF was performed. Read More

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http://dx.doi.org/10.1016/j.wneu.2018.07.285DOI Listing
November 2018
9 Reads

Bilateral persistent 'second' intersegmental vertebral arteries: illustrated with a case.

Acta Neurochir (Wien) 2018 Aug 23;160(8):1621-1623. Epub 2018 Jun 23.

Department of Neurosurgery, Postgraduate Institute of Medical Education and Research (PGIMER), Sector 12, Chandigarh, 160012, India.

Congenital craniovertebral junction deformities can be associated with an anomalous vertebral artery (VA). At times, the artery crosses the joint posteriorly (i.e. Read More

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http://dx.doi.org/10.1007/s00701-018-3601-1DOI Listing
August 2018
4 Reads

The Grisel's syndrome: A non-traumatic subluxation of the atlantoaxial joint.

Neurochirurgie 2018 Sep 3;64(4):327-330. Epub 2018 May 3.

CHU de Strasbourg, hôpital de Hautepierre, service de neurochirurgie, 67200 Strasbourg, France.

Introduction: Grisel's syndrome consists in rotational subluxation of C1-C2 following ENT infection or surgery. There is no consensus on management. We present 2 cases requiring surgical treatment in our center. Read More

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http://dx.doi.org/10.1016/j.neuchi.2018.02.001DOI Listing
September 2018
19 Reads

Recurrent upper lumbar disc herniation treated via the transforaminal approach using microendoscopy-assisted lumbar discectomy: a case report.

J Med Case Rep 2018 Apr 27;12(1):110. Epub 2018 Apr 27.

Department of Orthopaedic Surgery, Graduate School of Medicine, Kanazawa University, 13-1 Takara-machi, Kanazawa City, Ishikawa, 920-8641, Japan.

Background: Although microendoscopy-assisted lumbar discectomy for lateral or extraforaminal lumbar disc herniations via the lateral approach has previously been reported, microendoscopy-assisted lumbar discectomy for central or paramedian disc herniations via the lateral approach has not been reported. We report the first case of recurrent upper lumbar disc herniation (L2-L3) treated with microendoscopy-assisted lumbar discectomy via the transforaminal approach. No microendoscopy-assisted lumbar discectomy for recurrent upper lumbar disc herniation via the transforaminal approach has previously been reported. Read More

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http://dx.doi.org/10.1186/s13256-018-1653-8DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5921744PMC
April 2018
8 Reads

Multiplanar realignment for unstable Hangman's fracture with Posterior C2-3 fusion: A prospective series.

Clin Neurol Neurosurg 2018 Jun 27;169:133-138. Epub 2018 Mar 27.

Department of Neurosurgery, Postgraduate Institute of Medical Education & Research (PGIMER), Chandigarh, India.

Objective: There is lack of consensus on the preferred approach for unstable Hangman's fracture. The associated soft tissue injuries apart from apparent bony injury add to the complexity of dislocation and needs to be addressed. Here, we evaluated the clinico-radiological characteristics and outcome of patients managed by posterior C2-3 fusion. Read More

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http://dx.doi.org/10.1016/j.clineuro.2018.03.024DOI Listing
June 2018
4 Reads

Trabecular Anatomy of the Axis Vertebra: A Study of Shaded Volume-Rendered Computed Tomography Images.

World Neurosurg 2018 Feb;110:526-532.e10

Department of Radiology and Molecular Imaging, Sultan Qaboos University Hospital, Muscat, Oman.

Background: To date, trabecular morphology studies have been conducted on thin-section computed tomography (CT) scans of cadaveric bone. Here we describe the trabecular anatomy of the axis vertebra as revealed by an innovative imaging tool.

Methods: Ten patients who underwent thin-slice CT scans for suspected cervical spine injury were prospectively subjected to shaded volume-rendered 3-dimensional reconstruction of the images. Read More

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http://dx.doi.org/10.1016/j.wneu.2017.06.185DOI Listing
February 2018
4 Reads

Utility of STIR-MRI in Detecting the Pain Generator in Asymmetric Bilateral Pars Fracture: A Report of 5 Cases.

Neurol Med Chir (Tokyo) 2018 Feb 25;58(2):91-95. Epub 2017 Dec 25.

Department of Orthopedics, Tokushima University.

Lumbar spondylolysis usually occurs as a stress fracture in the pars interarticularis of the vertebra. It is a prevalent sports-related disorder and a common cause of low back pain. We encountered five athletes (4 males, 1 female) with severe low back pain. Read More

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http://dx.doi.org/10.2176/nmc.cr.2017-0123DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5830529PMC
February 2018
22 Reads

Neuronavigation and 3D fluoroscopy-guided lag screw reduction and osteosynthesis for traumatic spondylolistheses of the axis: a path worth exploring?

Neurosurg Focus 2017 08;43(2):E2

Department of Neurosurgery, University Medicine Greifswald, Germany; and.

OBJECTIVE In traumatic spondylolistheses of the axis, there is a marked heterogeneity of the observed injury patterns, with a wide range of the severity-from stable fractures, which can be treated conservatively with very good success, to highly unstable fractures, which should be treated surgically. A number of classification systems have been devised to assess the instability of the injuries and to derive a corresponding therapy recommendation. In particular, the results and recommendations regarding medium-severity cases are still inconclusive. Read More

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http://dx.doi.org/10.3171/2017.5.FOCUS17201DOI Listing
August 2017
8 Reads

Prevalence and clinical features of sports-related lumbosacral stress injuries in the young.

Arch Orthop Trauma Surg 2017 May 27;137(5):685-691. Epub 2017 Mar 27.

Department of Orthopaedic Surgery, Shiga University of Medical Science, Tsukinowa-cho, Otsu, Shiga, 520-2192, Japan.

Background: Stress injuries (stress fractures and stress reactions) of the lumbosacral region are one of the causes of sports-related lower back pain in young individuals. These injuries can be detected by bone marrow edema lesion on MRI. However, little is known about the prevalence and clinical features of early stage lumbosacral stress injuries. Read More

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http://dx.doi.org/10.1007/s00402-017-2686-yDOI Listing
May 2017
6 Reads

Etiology of Adult-onset Stress Fracture in the Lumbar Spine.

Clin Spine Surg 2017 04;30(3):E233-E238

*Department of Orthopedics, Institute of Health Biosciences, The University of Tokushima Graduate School, Tokushima †Department of Orthopedics, Teikyo University Mizonokuchi Hospital, Tokyo, Japan.

Study Design: This study was a case series.

Objective: The purpose of this paper was to present a case series of fresh stress fractures (spondylolysis) in the lumbar spines of adult athletes.

Summary Of Background Data: Lumbar spondylolysis is a stress fracture of the pars interarticularis, which is generally considered a disease of children or adolescence. Read More

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http://dx.doi.org/10.1097/BSD.0000000000000162DOI Listing
April 2017
6 Reads

Contralateral Approach for Minimally Invasive Treatment of Upper Lumbar Intervertebral Disc Herniation: Technical Note and Case Series.

World Neurosurg 2017 Apr 27;100:583-589. Epub 2017 Jan 27.

Department of Neurosurgery, MedStar Georgetown University Hospital, Washington, DC, USA. Electronic address:

Background: Upper lumbar disc herniations comprise only 1%-2% of all lumbar disc herniations. Patients exhibit nonspecific signs and symptoms in comparison to predictable radiculopathies, as seen in lower lumbar disc herniations. The unique anatomic characteristics of the upper lumbar spine present several challenges for safe and effective surgical treatment of disc herniations. Read More

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http://dx.doi.org/10.1016/j.wneu.2017.01.059DOI Listing
April 2017
17 Reads

C-2 arteriovenous fistula presenting as a pathologic hangman's fracture: case report.

J Neurosurg Spine 2017 Mar 2;26(3):341-345. Epub 2016 Dec 2.

New York University School of Medicine, New York, New York.

The authors report on an 81-year-old woman with a pathologic hangman's fracture secondary to a complex arteriovenous fistula (AVF). The patient presented with severe, unremitting neck pain and was found to have fractures bilaterally through the pars interarticularis of C-2 with significant anterior subluxation of C-2 over C-3 along with widening of the left transverse foramen. Due to an abnormally appearing left vertebral artery (VA) on CT angiography, the patient underwent conventional angiography, which revealed a complex AVF stemming from the left VA at the level of C-2 with dilated posterior cervical veins and a large venous varix. Read More

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http://dx.doi.org/10.3171/2016.8.SPINE16351DOI Listing
March 2017
8 Reads

A novel minimally invasive, dorsolateral, tubular partial odontoidectomy and autologous bone augmentation to treat dens pseudarthrosis: cadaveric, 3D virtual simulation study and technical report.

J Neurosurg Spine 2017 Feb 30;26(2):190-198. Epub 2016 Sep 30.

Department of Neurosurgery and.

OBJECTIVE The goal of this study was to demonstrate the clinical and technical nuances of a minimally invasive, dorsolateral, tubular approach for partial odontoidectomy, autologous bone augmentation, and temporary C1-2 fixation to treat dens pseudarthrosis. METHODS A cadaveric feasibility study, a 3D virtual reality reconstruction study, and the subsequent application of this approach in 2 clinical cases are reported. Eight procedures were completed in 4 human cadavers. Read More

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http://thejns.org/doi/10.3171/2016.7.SPINE16244
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http://dx.doi.org/10.3171/2016.7.SPINE16244DOI Listing
February 2017
22 Reads

Diagnostic accuracy of 3-T magnetic resonance imaging with 3D T1 VIBE versus computer tomography in pars stress fracture of the lumbar spine.

Skeletal Radiol 2016 Nov 10;45(11):1533-40. Epub 2016 Sep 10.

Victoria House Medical Imaging, 316 Malvern Road, Prahran, Victoria, Australia.

Objective: To compare the diagnostic accuracy of 3-T magnetic resonance imaging (MRI) with thin-slice 3D T1 VIBE sequence to 128-slice computer tomography (CT) in pars stress fractures of the lumbar spine.

Materials And Methods: 3-T MRI and CT of 24 patients involving 70 pars interarticularis were retrospectively reviewed by four blinded radiologists. The fracture morphology (complete, incomplete, or normal) was assessed on MRI and CT at different time points. Read More

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http://dx.doi.org/10.1007/s00256-016-2475-7DOI Listing
November 2016
3 Reads

Direct Repair of Lumbar Pars Interarticularis Defects by Utilizing Intraoperative O-Arm-Based Navigation and Microendoscopic Techniques.

Spine (Phila Pa 1976) 2016 Oct;41 Suppl 19:B6-B13

Department of Orthopaedic Surgery, Affiliated Xinqiao Hospital, The Third Military Medical University, Chongqing, People's Republic of China.

Study Design: A retrospective analysis of the clinical outcomes of eight patients with the lumbar pars interarticulars defects treated by direct repair with the aid of intraoperative O-arm based navigation and microendoscopic techniques.

Objective: The aim of this study was to investigate the efficacy and safety of direct screw repair by using minimally invasive surgery for the lumbar pars interarticulars defects in a pilot study.

Summary Of Background Data: Direct repair of pars interarticulars defects has been used to treat young adult patients. Read More

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http://dx.doi.org/10.1097/BRS.0000000000001815DOI Listing
October 2016
5 Reads

Direct C2 Pedicle Screw Fixation for Axis Body Fracture.

World Neurosurg 2016 Sep 17;93:279-85. Epub 2016 Jun 17.

Intermountain Medical Center, Murray, Utah, USA; Department of Neurosurgery, University of Utah, Salt Lake City, Utah, USA. Electronic address:

Background: Acute complex C2 vertebral body fracture specifically does not involve the odontoid process or C2 pars interarticularis. External stabilization can be effective but may prolong healing and increase morbidity. Many traditional surgical techniques can achieve internal stabilization at the expense of normal cervical motion. Read More

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http://dx.doi.org/10.1016/j.wneu.2016.06.047DOI Listing
September 2016
11 Reads

Lumbar spondylolysis in the adolescent athlete.

Phys Ther Sport 2016 Jul 13;20:56-60. Epub 2016 Apr 13.

University of Wisconsin Hospitals and Clinics, Sports Rehabilitation, 4602 East Park Blvd., Madison, WI, 53718, United States. Electronic address:

Introduction: Spondylolysis is a common occurrence for adolescent athletes who have low back pain. The injury involves a defect in the pars interarticularis, occurring as a result of repeated hyperextension and rotation.

Clinical Presentation: Clinical findings might include tightness of the hip flexors and hamstrings, weakness of the abdominals and gluteals, and an excessive lordotic posture. Read More

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http://dx.doi.org/10.1016/j.ptsp.2016.04.003DOI Listing
July 2016
8 Reads

Prevalence of Symptomatic Lumbar Spondylolysis in Pediatric Patients.

Orthopedics 2016 May 12;39(3):e434-7. Epub 2016 Apr 12.

Lumbar spondylolysis, a stress fracture of the pars interarticularis, is prevalent in adolescent athletes. Recent advances in diagnostic tools and techniques enable early diagnosis before these fractures progress to complete fractures through the pars. However, because patients often consult family physicians for primary care of low back pain and these physicians may not have access to diagnostic modalities such as magnetic resonance imaging (MRI) and computed tomography, stress fractures can be missed. Read More

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http://dx.doi.org/10.3928/01477447-20160404-07DOI Listing
May 2016
16 Reads

Stress fracture of the thoracic spine in an elite rhythmic gymnast: A case report.

J Med Invest 2016 ;63(1-2):119-21

Department of Orthopedics, Institute of Biomedical Sciences, Tokushima University Graduate School.

Spondylolysis, a defect or stress fracture of the vertebral pars interarticularis, occurs most frequently in the lower lumbar spine and occasionally in the cervical spine, but is extremely rare in the thoracic spine. We report the case of a 17 year-old girl, an elite rhythmic gymnast, who reported with early-stage thoracic spondylolysis at T10 and T11 levels. Physicians should be aware that performance of unusual athletic movements, such as those by gymnasts, may lead to spondylolysis in rare locations. Read More

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http://dx.doi.org/10.2152/jmi.63.119DOI Listing
January 2017
6 Reads

The anatomic rationale for transforaminal endoscopic interbody fusion: a cadaveric analysis.

Neurosurg Focus 2016 Feb;40(2):E12

Department of Neurosurgery, Rhode Island Hospital, The Warren Alpert Medical School of Brown University, Providence, Rhode Island.

OBJECTIVE The authors describe a cadaveric analysis to determine the ideal dimensions and trajectory for considering endoscopic transforaminal interbody implantation. METHODS The soft tissues of 8 human cadavers were removed from L-1 to the sacrum, exposing the posterior bony elements. Facetectomies were performed bilaterally at each lumbar level with resection of the pars interarticularis, revealing the pedicles, nerve roots, and interbody disc space. Read More

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http://dx.doi.org/10.3171/2015.10.FOCUS15389DOI Listing
February 2016
30 Reads

Bilateral fracture of the superior articular process of S1 - An unusual fracture seen in a speed skater.

Br J Neurosurg 2017 Apr 13;31(2):273-274. Epub 2016 Jan 13.

a Spine and Spinal Cord Center, Mita Hospital, International University of Health and Welfare , Tokyo , Japan.

Background Fractures of the superior articular process are rarely seen in clinical practice. Repetitive spinal movements may lead to fractures of the pars interarticularis, resulting in spondylolysis. Traumatic spinal fractures often involve the vertebral body, transvers and/or the spinous processes. Read More

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http://dx.doi.org/10.3109/02688697.2015.1122174DOI Listing
April 2017
5 Reads

[MINIMALLY INVASIVE SURGERY FOR DIRECT REPAIR OF LUMBAR SPONDYLOLYSIS BY UTILIZING INTRAOPERATIVE NAVIGATION AND MICROENDOSCOPIC TECHNIQUES].

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi 2015 Oct;29(10):1244-8

Objective: To analyze the effectiveness of direct screw repair for lumbar spondylolysis by using intraoperative O-arm based navigation and microendoscopic techniques.

Methods: Between February 2012 and May 2014, 11 consecutive patients with lumbar spondylolysis were treated with Buck's procedure by the aid of intraoperative O-arm based navigation and minimally invasive approach. The debridement and autograft of pars interarticularis defects was performed under microendoscopy. Read More

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October 2015
14 Reads

Nonconsecutive Pars Interarticularis Defects.

Am J Orthop (Belle Mead NJ) 2015 Dec;44(12):E526-9

Department of Orthopaedic Surgery, University of Toledo Medical Center, Toledo, OH.

Lumbar spondylolysis is a well-recognized condition occurring in adolescents because of repetitive overuse in sports. Nonconsecutive spondylolysis involving the lumbar spine is rare. In contrast to single-level pars defects that respond well to conservative treatment, there is no consensus about the management of multiple-level pars fractures; a few reports indicated that conservative management is successful, and the majority acknowledged that surgery is often required. Read More

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December 2015
12 Reads

The effectiveness of surgical versus conservative treatment for symptomatic unilateral spondylolysis of the lumbar spine in athletes: a systematic review.

JBI Database System Rev Implement Rep 2015 Apr 17;13(3):137-73. Epub 2015 Apr 17.

Joanna Briggs Institute, Faculty of Health Sciences, The University of Adelaide, South Australia.

Background: Spondylolysis is a common cause of low back pain in athletes. Historically, spondylolysis injuries were thought to be mostly bilateral; however advances in lumbar spine imaging have shown that in certain athlete groups, unilateral spondylolysis is highly prevalent. It remains unclear whether athletes with unilateral spondylolysis who undergo surgical repair are able to return to sports as effectively or faster than if they had conservative treatment. Read More

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http://dx.doi.org/10.11124/jbisrir-2015-1926DOI Listing
April 2015
13 Reads

A minimally invasive approach to defects of the pars interarticularis: Restoring function in competitive athletes.

Clin Neurol Neurosurg 2015 Dec 28;139:29-34. Epub 2015 Aug 28.

Department of Neurosurgery, Rush University Medical Center, Chicago, IL, United States. Electronic address:

Objectives: To understand that young athletes have a higher incidence of pars interarticularis defects than the general population. This may be due to an immature spine put under higher stress loads at an early age. Traditionally, surgery was reserved for those who failed conservative therapy, and consisted of open exposure, bone grafting and placement of pedicle screws. Read More

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http://dx.doi.org/10.1016/j.clineuro.2015.08.024DOI Listing
December 2015
39 Reads

Percutaneous pars interarticularis screw fixation: a technical note.

Eur Spine J 2016 06 26;25(6):1651-4. Epub 2015 Jul 26.

Royal National Orthopaedic Hospital, Stanmore, London, UK.

Purpose: A conventional midline posterior approach is used for most of the described surgical techniques. We describe a technique of percutaneous fixation of the pars interarticularis, augmented where necessary by grafting the defect, which minimises muscle injury.

Method: A 4. Read More

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http://dx.doi.org/10.1007/s00586-015-4152-2DOI Listing
June 2016
5 Reads

Spondylolysis and Beyond: Value of SPECT/CT in Evaluation of Low Back Pain in Children and Young Adults.

Radiographics 2015 May-Jun;35(3):819-34

From the Department of Radiology, Divisions of Nuclear Medicine (A.T.T., S.E.S., C.G.A., M.J.G.) and Pediatric Orthopaedic Surgery (C.T.M.), Cincinnati Children's Hospital Medical Center, 3333 Burnet Ave, Cincinnati, OH 45229.

Single photon emission computed tomography (SPECT)/computed tomography (CT) is ideally suited for assessment of low back pain in children and young adults. Spondylolysis is one of the most common structural causes of low back pain and is readily identified and characterized in terms of its chronicity and likelihood to heal. The value of SPECT/CT extends to identification and characterization of other causes of low back pain, including abnormalities of the posterior elements, developing vertebral endplate, transverse processes, and sacrum and sacroiliac joint. Read More

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http://dx.doi.org/10.1148/rg.2015140092DOI Listing
February 2016
8 Reads

Grisel Syndrome Following Adenoidectomy: Surgical Management in a Case with Delayed Diagnosis.

World Neurosurg 2015 Nov 7;84(5):1494.e7-12. Epub 2015 May 7.

Neurosurgery Department, AORN Santobono-Pausilipon-Annunziata Children's Hospital, Naples, Italy.

Background: Grisel syndrome is a nontraumatic rotatory subluxation of the atlantoaxial joint, following nasopharyngeal inflammation or ear, nose, and throat (ENT) procedures. The syndrome should be suspected in cases of persistent neck pain and stiffness, especially after ENT surgical procedures. The primary treatment of early detected Grisel syndrome is conservative. Read More

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http://dx.doi.org/10.1016/j.wneu.2015.04.060DOI Listing
November 2015
18 Reads

A review of the pathomechanism of forward slippage in pediatric spondylolysis: the Tokushima theory of growth plate slippage.

J Med Invest 2015 ;62(1-2):11-8

Department of Orthopedics, Tokushima University.

Spondylolysis is a stress fracture of the pars interarticularis, which in some cases progresses to spondylolisthesis (forward slippage of the vertebral body). This slip progression is prevalent in children and occurs very rarely after spinal maturation. The pathomechanism and predilection for children remains controversial despite considerable clinical and basic research into the disorder over the last three decades. Read More

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http://dx.doi.org/10.2152/jmi.62.11DOI Listing
December 2016
25 Reads
1 Citation

C1 posterior arch screw as an auxiliary anchor in posterior reconstruction for atlantoaxial dislocation associated with type II odontoid fracture: a case report and review of the literature.

Springerplus 2014 13;3:672. Epub 2014 Nov 13.

Department of Orthopedic Surgery, Keio University School of Medicine, 35 Shinanomachi, Tokyo, 160-8582 Shinjuku-ku Japan.

Introduction: Although pedicle or lateral mass screws are usually chosen to fix atlantoaxial (C1-C2) instability, there is an increased risk for vertebral artery (VA) injury when used in patients with bone or arterial anomalies or osteoporotic bone. Here we report the C1 posterior arch screw as a new technique for upper cervical fixation.

Case Description: A 90-year-old man complained of upper cervical pain after falling in his house. Read More

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http://dx.doi.org/10.1186/2193-1801-3-672DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4234742PMC
December 2014
16 Reads

Occiput/C1-C2 fixations using intra-laminar screw of axis - A long-term follow-up.

Br J Neurosurg 2015 Apr 4;29(2):260-4. Epub 2014 Dec 4.

Department of Neurosurgery, G.B. Pant Hospital and Associated Maulana Azad Medical College (University of Delhi) , New Delhi , India.

Background: The surgical management of the craniocervical junction is challenging. Rigid posterior fixation of occiput/C1-C2 can be performed using a variety of surgical techniques including C2 pedicle/pars interarticularis, transarticular and intralaminar screw fixations.

Methods: Forty-one patients were treated with occipital plate/C1 lateral mass and C2 intra-laminar screw fixations for basilar invagination and congenital atlantoaxial subluxation, post-traumatic instability, tuberculous and rheumatoid arthritis-associated atlantoaxial dislocation. Read More

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http://dx.doi.org/10.3109/02688697.2014.987211DOI Listing
April 2015
25 Reads

Axis ring fractures due to simulated head impacts.

Authors:
Paul C Ivancic

Clin Biomech (Bristol, Avon) 2014 Sep 6;29(8):906-11. Epub 2014 Jul 6.

Biomechanics Research Laboratory, Department of Orthopaedics and Rehabilitation, Yale University School of Medicine, New Haven, CT, USA. Electronic address:

Background: We investigated mechanisms of axis ring fractures due to simulated head impacts.

Methods: Our model consisted of a human upper cervical spine specimen (occiput through C3) mounted to a surrogate torso mass on a sled and carrying a surrogate head. We divided 13 specimens into 3 groups based upon head impact location: upper forehead in the midline, upper lateral side of the forehead, and upper lateral side of the head. Read More

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http://dx.doi.org/10.1016/j.clinbiomech.2014.06.017DOI Listing
September 2014
6 Reads

Use of magnetic resonance imaging in the evaluation of spondylolysis.

J Pediatr Orthop 2015 Apr-May;35(3):271-5

*Brooke Army Medical Center, Fort Sam, Houston, TX †Department of Orthopaedic Surgery, Le Bonheur Children's Hospital, University of Tennessee-Campbell Clinic, Memphis, TN.

Background: In early studies, magnetic resonance imaging (MRI) had low sensitivity and positive predictive value in the evaluation of the pars interarticularis pathology; however, more recent reports have suggested an expanded role for MRI. The purpose of the present study was to evaluate the effectiveness of MRI in the diagnosis of pars injuries and compare it to computed tomography (CT), which was used as the reference "gold standard" for the detection of fractures.

Methods: The radiographic and clinic data of 93 adolescents and young adults with a presumptive diagnosis of spondylolysis based upon history and clinic examination were reviewed. Read More

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http://dx.doi.org/10.1097/BPO.0000000000000244DOI Listing
August 2015
5 Reads

Back pain in children and adolescents.

Bone Joint J 2014 Jun;96-B(6):717-23

Royal National Orthopaedic Hospital, Spinal Surgical Unit, Brockley Hill, Stanmore HA7 4LP, UK.

Back pain is a common symptom in children and adolescents. Here we review the important causes, of which defects and stress reactions of the pars interarticularis are the most common identifiable problems. More serious pathology, including malignancy and infection, needs to be excluded when there is associated systemic illness. Read More

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http://dx.doi.org/10.1302/0301-620X.96B6.33075DOI Listing
June 2014
4 Reads

Occipitocervical fusion via occipital condylar fixation: a clinical case series.

J Spinal Disord Tech 2014 Jun;27(4):232-6

Department of Neurosurgery, University of South Florida, Tampa, FL.

Study Design: Retrospective review/case series.

Objective: This study aims to present the clinical feasibility of condylar fixation in occipitocervical (OC) fusion. Here, we present the largest clinical series to date of patients who underwent OC fusion via cervicocondylar fixation using a polyaxial screw/rod construct. Read More

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http://dx.doi.org/10.1097/BSD.0b013e31825bfeeaDOI Listing
June 2014
35 Reads

MRI findings in the lumbar spines of asymptomatic elite junior tennis players.

Skeletal Radiol 2014 Jul 2;43(7):925-32. Epub 2014 Apr 2.

Department of Radiology, Chelsea and Westminster Hospital NHS Foundation Trust, 369 Fulham Road, London, SW10 9NH, England, UK,

Objective: To evaluate the MRI findings in the lumbar spines of asymptomatic elite junior tennis players.

Materials And Methods: The lumbar spine MRI studies of 98 asymptomatic junior elite tennis players (51 male, 47 female) with a mean age of 18 years (age range 11.2-26. Read More

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http://dx.doi.org/10.1007/s00256-014-1862-1DOI Listing
July 2014
4 Reads

Traumatic rupture of the neurocentral synchondrosis of the axis in a child.

J Neurosurg Pediatr 2014 May 14;13(5):548-52. Epub 2014 Mar 14.

Department of Pediatric Neurosurgery, Regional Center for Pediatric Neurosurgery;

The authors report the first case of unilateral traumatic rupture of the C-2 neurocentral synchondrosis. A 26-month-old child was in a vehicular collision that caused his head to be rotated sharply to the left with the neck flexed. He had severe neck pain but was neurologically normal. Read More

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http://dx.doi.org/10.3171/2014.2.PEDS13499DOI Listing
May 2014
7 Reads

Unusual mechanism of injury resulting in a thoracic chance fracture in a rodeo athlete: a case report.

J Athl Train 2014 Mar-Apr;49(2):274-9. Epub 2014 Feb 12.

Human Performance, Dance, and Recreation Department, New Mexico State University, Las Cruces.

Objective: To introduce the characteristics of a Chance fracture and increase awareness of the mechanism of injury that may occur during athletic activity.

Background: A T12 Chance fracture was diagnosed in an 18-year-old male rodeo athlete. The rider was forced into extreme lumbothoracic hyperflexion when the horse bucked within the chute, pinning the rider's legs to his chest. Read More

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http://dx.doi.org/10.4085/1062-6050-48.6.06DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3975782PMC
June 2015
7 Reads

Lumbar trabecular bone mineral density distribution in patients with and without vertebral fractures: a case-control study.

Eur Spine J 2014 Jun 30;23(6):1346-53. Epub 2014 Jan 30.

Biomechanics Laboratory, Division of Orthopedic Research, Mayo Clinic, 200 First Street SW, Rochester, MN, 55905, USA.

Purpose: The proportion of load transmitted through the lumbar neural arch increases with aging, spinal degeneration, and lordosis, effectively shielding the lumbar vertebral bodies from load. This stress shielding may contribute to bone loss in the vertebral body, leading to increased fracture risk. To test his hypothesis, we performed a study to determine if vertebral body fractures were associated with a higher neural arch/vertebral body volumetric bone mineral density (vBMD) ratio. Read More

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http://dx.doi.org/10.1007/s00586-014-3205-2DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4167738PMC
June 2014
8 Reads

Spondylolysis of C-2 in children 3 years of age or younger: clinical presentation, radiographic findings, management, and outcomes with a minimum 12-month follow-up.

J Neurosurg Pediatr 2014 Feb 20;13(2):196-203. Epub 2013 Dec 20.

Division of Pediatric Neurosurgery, Texas Children's Hospital, and Department of Neurosurgery, Baylor College of Medicine, Houston, Texas;

Object: Cervical spondylolysis is a rare condition that results from a pars interarticularis defect. The C-6 level is the most frequently involved site in the cervical spine. Its clinical presentations range from incidental radiographic findings to neck pain and, rarely, neurological deficits. Read More

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http://dx.doi.org/10.3171/2013.11.PEDS13422DOI Listing
February 2014
4 Reads

Finite element investigation of the effect of a bifid arch on loading of the vertebral isthmus.

Spine J 2014 Apr 21;14(4):675-82. Epub 2013 Nov 21.

The Centre for Spinal Studies and Surgery, Queens Medical Centre, Derby Road, Nottingham, NG72UH, UK.

Background: The biomechanical effect of a bifid arch as seen in spina bifida occulta and following a midline laminectomy is poorly understood.

Purpose: To test the hypothesis that fatigue failure limits will be exceeded in the case of a bifid arch, but not in the intact case, when the segment is subjected to complex loading corresponding to normal sporting activities.

Study Design: Finite element analysis. Read More

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http://dx.doi.org/10.1016/j.spinee.2013.08.040DOI Listing
April 2014
6 Reads

Operative nuances to safeguard anomalous vertebral artery without compromising the surgery for congenital atlantoaxial dislocation: untying a tough knot between vessel and bone.

J Neurosurg Spine 2014 Jan 1;20(1):5-10. Epub 2013 Nov 1.

Departments of Neurosurgery and.

Object: Stabilization of the craniovertebral junction (CVJ) by using lateral masses requires extensive dissection. The vertebral artery (VA) is commonly anomalous in patients with congenital CVJ anomaly. Such a vessel is likely to be injured during dissection or screw placement. Read More

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http://dx.doi.org/10.3171/2013.9.SPINE13491DOI Listing
January 2014
8 Reads

A finite element evaluation of the moment arm hypothesis for altered vertebral shear failure force.

Comput Methods Biomech Biomed Engin 2015 15;18(5):545-55. Epub 2013 Aug 15.

a Canadian Memorial Chiropractic College , Toronto , Ontario , Canada.

The mechanism of vertebral shear failure is likely a bending moment generated about the pars interarticularis by facet contact, and the moment arm length (MAL) between the centroid of facet contact and the location of pars interarticularis failure has been hypothesised to be an influential modulator of shear failure force. To quantitatively evaluate this hypothesis, anterior shear of C3 over C4 was simulated in a finite element model of the porcine C3-C4 vertebral joint with each combination of five compressive force magnitudes (0-60% of estimated compressive failure force) and three postures (flexed, neutral and extended). Bilateral locations of peak stress within C3's pars interarticularis were identified along with the centroids of contact force on the inferior facets. Read More

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http://www.tandfonline.com/doi/abs/10.1080/10255842.2013.820
Publisher Site
http://dx.doi.org/10.1080/10255842.2013.820717DOI Listing
December 2015
7 Reads