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https://www.readbyqxmd.com/read/28323717/treatment-of-lumbar-split-fracture-dislocation-with-short-segment-or-long-segment-posterior-fixation-and-anterior-fusion
#1
Fei Chen, Yijun Kang, Haisheng Li, Guohua Lv, Chang Lu, Jing Li, Bing Wang, Weihua Chen, Zhehao Dai
STUDY DESIGN: Retrospective analysis of 16 patients. SUMMARY OF BACKGROUND DATA: The lumbar split fracture-dislocation is a rare but severe injury, which is type C1.2.1 fracture in the Association for the Study of Internal Fixation spine fracture classification. The axial compressive and torsional force shattered the vertebral body into 2 halves and displaced them rotationally. This kind of fracture is so highly unstable that the treatment is very challenging. PURPOSE: The purpose of this study was to report and compare on clinical outcome and complications of patients with lumbar split fracture-dislocation which had been treated either short-segment or long-segment posterior fixation and anterior fusion...
April 2017: Clinical Spine Surgery
https://www.readbyqxmd.com/read/28323706/comparison-of-open-versus-percutaneous-pedicle-screw-fixation-using-the-sextant-system-in-the-treatment-of-traumatic-thoracolumbar-fractures
#2
Hongwei Wang, Yue Zhou, Changqing Li, Jun Liu, Liangbi Xiang
STUDY DESIGN: We retrospectively reviewed 100 patients who were posterior stabilized without graft fusion. Using the Sextant system, 22 patients underwent minimally invasive short-segment 4-pedicle screw fixation (MIF4) and 39 patients underwent minimally invasive short-segment combined with intermediate screws fixation, that is, 6-pedicle screw fixation (MIF6). The conventional open posterior short-segment 4-pedicle screw fixation (OPF4) technique was used in 39 patients. OBJECTIVE: To evaluate the feasibility, safety, and efficacy of percutaneous pedicle screw fixation using the Sextant system in the treatment of traumatic thoracolumbar fractures compared with the conventional open posterior short-segment pedicle screw fixation technique...
April 2017: Clinical Spine Surgery
https://www.readbyqxmd.com/read/28323704/minimizing-pedicle-screw-pullout-risks-a-detailed-biomechanical-analysis-of-screw-design-and-placement
#3
Rohan-Jean Bianco, Pierre-Jean Arnoux, Eric Wagnac, Jean-Marc Mac-Thiong, Carl-Éric Aubin
STUDY DESIGN: Detailed biomechanical analysis of the anchorage performance provided by different pedicle screw designs and placement strategies under pullout loading. OBJECTIVE: To biomechanically characterize the specific effects of surgeon-specific pedicle screw design parameters on anchorage performance using a finite element model. SUMMARY OF BACKGROUND DATA: Pedicle screw fixation is commonly used in the treatment of spinal pathologies...
April 2017: Clinical Spine Surgery
https://www.readbyqxmd.com/read/28323691/mri-may-serve-as-a-valid-alternative-to-standing-radiography-in-evaluating-the-sagittal-alignment-of-the-upper-thoracic-spine
#4
Fei Wang, Xu Sun, Saihu Mao, Zhen Liu, Jun Qiao, Feng Zhu, Zezhang Zhu, Tao Pan, Ling Chen, Qinghua Zhao, Yong Qiu
STUDY DESIGN: This study is of a retrospective radiographic design. OBJECTIVE: The objective of the study was to compare supine magnetic resonance images (MRI) with standing x-ray scanning in the evaluation of the sagittal alignment of the upper thoracic spine. SUMMARY OF BACKGROUND DATA: X-ray films have been reported to be inaccurate in evaluating the proximal thoracic sagittal alignment because of poor visibility of the upper thoracic region...
April 2017: Clinical Spine Surgery
https://www.readbyqxmd.com/read/28323689/intradural-intramedullary-cervicothoracic-tumor-with-long-segmental-localization-a-case-report-with-step-by-step-surgical-treatment-strategy-with-neuromonitorization
#5
Askin E Hasturk, Teoman Etikcan, Suat Canbay
Ependymomas are the most common gliomas of the conus and lower cord, with the cervical cord being the second most common location. These tumors can extend upward 3-4 vertebra, and some ependymomas can extend up over 15 segments. Depending on many factors, such as tumor size, lateralization, kyphotic deformity, and lordosis state, there are several posterior surgical options, including laminectomy, laminectomy and lateral mass screw-plate, and laminoplasty. In this study, we discuss a case of intradural intramedullary cervicothoracic ependymoma with long-segmental localization, as well as the general surgical principles of its excision with step-by-step demonstrative figures...
April 2017: Clinical Spine Surgery
https://www.readbyqxmd.com/read/28320029/morphometric-changes-of-the-lumbar-intervertebral-foramen-after-percutaneous-endoscopic-foraminoplasty-under-local-anesthesia
#6
Tatsuhiko Henmi, Tomoya Terai, Akihiro Nagamachi, Koichi Sairyo
Background Percutaneous endoscopic diskectomy (PED) for the lumbar spine is a relatively new technique that is becoming more common due to its relatively less invasive nature. However, one possible serious complication is an exiting nerve injury when the cannula of the endoscope is inserted into the neural canal through the intervertebral foramen. A technique to enlarge the intervertebral foramen, called foraminoplasty, was recently established to insert the cannula safely into an appropriate position in the neural canal...
March 20, 2017: Journal of Neurological Surgery. Part A, Central European Neurosurgery
https://www.readbyqxmd.com/read/28319497/vertebral-hemangioma-mimicking-bone-metastasis-in-68ga-psma-ligand-pet-ct
#7
Carlos Artigas, François-Xavier Otte, Marc Lemort, Roland van Velthoven, Patrick Flamen
Ga-PSMA PET/CT was performed in a 68-year-old man to evaluate recurrent prostate cancer due to elevated serum prostate-specific antigen level. Images showed a focal uptake in the prostatic gland, suggesting local relapse, and an intense uptake in the 12th thoracic vertebra, with no morphological abnormalities in CT slices. In order to confirm extraprostatic disease and before radiotherapy planning, a full-spine MRI was performed, resulting with the morphological pattern of a vertebral hemangioma. Hystological analysis confirmed the local relapse in the prostate...
March 17, 2017: Clinical Nuclear Medicine
https://www.readbyqxmd.com/read/28318333/urinary-levels-of-pyridinoline-and-deoxypyridinoline-and-bone-mineral-density-in-children-with-type-1-diabetes-mellitus
#8
Nadide Melike Sav, Mustafa Kendirci, Leyla Akin, Selim Kurtoglu
OBJECTIVE: There is still controversy over the impact of diabetes mellitus (DM) on bone mass in children. Pyridinoline (Pyr) and deoxypyridinoline (DPyr), which stabilize the collagen chains within the extracellular matrix, are known as specific bone turnover markers. The aim of this study was to investigate the relationship between urinary Pyr and DPyr excretions and bone mineral density (BMD) in children with type 1 DM. METHODS: Serum levels of Ca, phosphorus (P), magnesium (Mg), and parathormone (PTH), alkaline phosphatase (ALP) activity, and urinary excretions of Pyr and DPyr were evaluated in 50 diabetic and 130 healthy control subjects aged between 7 and 15 years...
March 20, 2017: Endocrine Research
https://www.readbyqxmd.com/read/28317557/the-role-of-allometry-and-posture-in-the-evolution-of-the-hominin-subaxial-cervical-spine
#9
Mikel Arlegi, Asier Gómez-Olivencia, Lou Albessard, Ignacio Martínez, Antoine Balzeau, Juan Luis Arsuaga, Ella Been
Cervical vertebrae not only protect the spinal cord but also are the insertion and origin points for muscles related to the movement of the head, upper limb, and trunk, among others, and are thus important elements in primate evolution. While previous work has been undertaken on the first two cervical vertebrae, there is a dearth of studies on the subaxial cervical spine in hominines. In this paper, we provide detailed morphological information on two important aspects of the subaxial cervical vertebrae (C3 - C7): mid-sagittal morphology and superior facet orientation...
March 2017: Journal of Human Evolution
https://www.readbyqxmd.com/read/28317555/the-cervical-spine-of-australopithecus-sediba
#10
Marc R Meyer, Scott A Williams, Peter Schmid, Steven E Churchill, Lee R Berger
Cervical vertebrae are rare in the early hominin fossil record, presenting a challenge for understanding the evolution of the neck and head carriage in hominin evolution. Here, we examine the cervical vertebrae of Australopithecus sediba, which unlike other South African taxa is known from associated cervical vertebrae. The A. sediba cervical vertebrae exhibit human-like values for wedging, pedicle cross-sectional areas, and articular facet heights, indicating reduced ventral loading relative to African apes...
March 2017: Journal of Human Evolution
https://www.readbyqxmd.com/read/28317122/an-anthropomorphic-abdominal-phantom-for-deformable-image-registration-accuracy-validation-in-adaptive-radiation-therapy
#11
Yuliang Liao, Linjing Wang, Xiangdong Xu, Haibin Chen, Jiawei Chen, Guoqian Zhang, Huaiyu Lei, Ruihao Wang, Shuxu Zhang, Xuejun Gu, Xin Zhen, Linghong Zhou
PURPOSE: To design and construct a three-dimensional (3D) anthropomorphic abdominal phantom for geometric accuracy and dose summation accuracy evaluations of deformable image registration (DIR) algorithms for adaptive radiation therapy (ART). METHOD: Organ molds, including liver, kidney, spleen, stomach, vertebra and two metastasis tumors, were 3D printed using contours from an ovarian cancer patient. The organ molds were molded with deformable gels made of different mixtures of polyvinyl chloride (PVC) and the softener dioctyl terephthalate...
March 20, 2017: Medical Physics
https://www.readbyqxmd.com/read/28315990/model-based-registration-of-preprocedure-mr-and-intraprocedure-us-of-the-lumbar-spine
#12
Delaram Behnami, Alireza Sedghi, Emran Mohammad Abu Anas, Abtin Rasoulian, Alexander Seitel, Victoria Lessoway, Tamas Ungi, David Yen, Jill Osborn, Parvin Mousavi, Robert Rohling, Purang Abolmaesumi
PURPOSE: Epidural and spinal needle insertions, as well as facet joint denervation and injections are widely performed procedures on the lumbar spine for delivering anesthesia and analgesia. Ultrasound (US)-based approaches have gained popularity for accurate needle placement, as they use a non-ionizing, inexpensive and accessible modality for guiding these procedures. However, due to the inherent difficulties in interpreting spinal US, they yet to become the clinical standard-of-care...
March 18, 2017: International Journal of Computer Assisted Radiology and Surgery
https://www.readbyqxmd.com/read/28315802/upper-thoracic-versus-lower-thoracic-as-site-of-upper-instrumented-vertebrae-for-long-fusion-surgery-in-adult-spinal-deformity-a-meta-analysis-of-proximal-junctional-kyphosis
#13
Ming Luo, Pu Wang, Wengang Wang, Mingkui Shen, Genzhong Xu, Lei Xia
OBJECTIVE: A meta-analysis was performed to compare incidence rates of radiographic and surgical proximal junctional kyphosis (PJK) between upper thoracic (UT) versus lower thoracic (LT) as site of upper-instrumented vertebrae (UIV) endpoints for long fusion surgery in adult spinal deformity (ASD). METHODS: The MEDLINE, Embase, and the Cochrane Library databases were searched for English-language articles that addressed the UT versus LT fixation strategies. The division of the UT and LT groups was based on UIV...
March 15, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28315175/associations-of-adipose-and-muscle-tissue-parameters-at-colorectal-cancer-diagnosis-with-long-term-health-related-quality-of-life
#14
Eline H van Roekel, Martijn J L Bours, Malou E M Te Molder, José J L Breedveld-Peters, Steven W M Olde Damink, Leo J Schouten, Silvia Sanduleanu, Geerard L Beets, Matty P Weijenberg
PURPOSE: Increased visceral adiposity (visceral obesity) and muscle wasting (sarcopenia) at colorectal cancer (CRC) diagnosis, quantified by computed tomography (CT) image analysis, have been unfavorably associated with short-term clinical outcomes and survival, but associations with long-term health-related quality of life (HRQoL) have not been investigated. We studied associations of visceral adiposity, muscle fat infiltration, muscle mass, and sarcopenia at CRC diagnosis with HRQoL 2-10 years post-diagnosis...
March 17, 2017: Quality of Life Research
https://www.readbyqxmd.com/read/28314808/cervical-diffuse-idiopathic-skeletal-hyperostosis-dish-causing-oropharyngeal-dysphagia
#15
Nellowe Candelario, Kevin Bryan Lo, Mario Naranjo
Diffuse idiopathic skeletal hyperostosis (DISH) is a non-inflammatory condition characterised by calcification and ossification of the vertebral ligaments. It is most commonly seen to affect the thoracic and lumbar vertebrae and is usually seen among elderly men. The cause of this condition is unknown. Risk factors include male gender, obesity, diabetes and advancing age. The majority of these cases are found incidentally on imaging and patients are generally asymptomatic. Cervical DISH is less common than its thoracic and lumbar counterparts...
March 17, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28306642/damage-identification-on-vertebral-bodies-during-compressive-loading-using-digital-image-correlation
#16
Hannah M Gustafson, Angela D Melnyk, Gunter P Siegmund, Peter A Cripton
STUDY DESIGN: Ex vivo compression experiments on isolated cadaveric vertebrae OBJECTIVE.: To qualitatively compare the fracture locations identified in video analysis with the locations of high compressive strain measured with DIC on vertebral bodies and to evaluate the timing of local damage to the cortical shell relative to the global yield force SUMMARY OF BACKGROUND DATA.: In previous ex vivo experiments, cortical bone fracture has been identified using various methods including acoustic emission sensors, strain gages, video analysis, or force signals...
March 16, 2017: Spine
https://www.readbyqxmd.com/read/28306639/defining-the-role-of-the-lower-limbs-in-compensating-for-sagittal-malalignment
#17
Renaud Lafage, Barthelemy Liabaud, Bassel G Diebo, Jonathan H Oren, Shaleen Vira, Sébastien Pesenti, Themistocles S Protopsaltis, Thomas J Errico, Frank J Schwab, Virginie Lafage
STUDY DESIGN: Retrospective review OBJECTIVE.: Investigate the role of lower limbs compensation with progressive sagittal malalignment SUMMARY OF BACKGROUND DATA.: While lower limb compensatory mechanisms are an established response to progressive sagittal malalignment, their specific role and potential impact on surgical planning has not been evaluated. METHODS: Single center retrospective review of full body xrays was performed in patients >20 yrs. Parameters were measured with dedicated software...
March 16, 2017: Spine
https://www.readbyqxmd.com/read/28306517/biomechanical-analysis-of-stiffness-and-fracture-displacement-after-using-pmma-augmented-sacroiliac-screw-fixation-for-sacrum-fractures
#18
Andreas Höch, Richard Schimpf, Niels Hammer, Stefan Schleifenbaum, Michael Werner, Christoph Josten, Jörg Böhme
Cement augmentation of pedicle screws is the gold standard for the stabilization of osteoporotic fractures of the spine. In-screw cement augmentation, in which cement is injected through the cannula, is another option for fracture stabilization of fragility fractures of the sacrum. However, biomechanical superiority of this technique compared to conventional sacroiliac screw fixation has not been tested. The present study compares the stability of cement-augmented and non-cement-augmented sacroiliac screw fixation in osteoporotic sacrum fractures under cyclic loading...
March 15, 2017: Biomedizinische Technik. Biomedical Engineering
https://www.readbyqxmd.com/read/28304239/immunoglobulin-g4-related-epidural-inflammatory-pseudotumor-presenting-with-pulmonary-complications-and-spinal-cord-compression-case-report
#19
Kavelin Rumalla, Kyle A Smith, Paul M Arnold
Immunoglobulin G4-related disease (IgG4-RD) is a recently defined condition characterized by inflammatory tumefactive lesions in various organ systems. IgG4-RD is a clinical and radiological diagnosis of exclusion and requires the presence of specific histopathological criteria for diagnosis. A 50-year-old man presented to an outside hospital with a 3-month history of progressively worsening back pain and symptoms of pleurisy, nasal crusting, and hematochezia. Radiological workup revealed an epidural-paraspinal mass with displacement of the spinal cord, destruction of the T5-6 vertebrae, and extension into the right lung...
March 17, 2017: Journal of Neurosurgery. Spine
https://www.readbyqxmd.com/read/28303382/a-rare-case-of-non-traumatic-multi-level-bilateral-pedicle-fractures-of-the-lumbar-spine-in-a-60-year-old-patient
#20
Timo Schmid, Paul Heini, Lorin Benneker
INTRODUCTION: We report a 60-year-old patient who sustained non-traumatic, multi-level, bilateral lumbar pedicle fractures in the setting of unilateral lumbar spondylolysis. A possible fracture mechanism is evaluated and a review of the literature is presented. Whereas contralateral pedicle fractures of lumbar vertebrae with unilateral spondylosis are well described in young athletes, there is only one case report of multi-level, bilateral pedicle fractures of the lumbar spine in a young patient who sustained a high-impact motorcycle accident...
March 16, 2017: European Spine Journal
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