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https://www.readbyqxmd.com/read/28926781/a-leukomyeloencephalopathy-of-unknown-origin-in-an-azawakh-dog
#1
Maria Teresa Mandara, Alice Reginato, Federica Balducci, Marco Bernardini
A diffuse bilaterally symmetrical leukomyeloencephalopathy was observed in a 6-year-old male Azawakh dog showing a slowly progressive ataxia of six months duration associated with sensory disorders. Severe bilaterally symmetrical demyelination and vacuolisation were confined to the dorsal columns along the entire spinal cord with a minor axonal degeneration. The main changes of myelin sheaths consisted in splitting and intramyelin vacuolization. Naked axons were scattered in a network of astrocytic processes and collagen fibres...
September 5, 2017: Research in Veterinary Science
https://www.readbyqxmd.com/read/28915323/hair-cell-transduction-tuning-and-synaptic-transmission-in-the-mammalian-cochlea
#2
Robert Fettiplace
Sound pressure fluctuations striking the ear are conveyed to the cochlea, where they vibrate the basilar membrane on which sit hair cells, the mechanoreceptors of the inner ear. Recordings of hair cell electrical responses have shown that they transduce sound via submicrometer deflections of their hair bundles, which are arrays of interconnected stereocilia containing the mechanoelectrical transducer (MET) channels. MET channels are activated by tension in extracellular tip links bridging adjacent stereocilia, and they can respond within microseconds to nanometer displacements of the bundle, facilitated by multiple processes of Ca2+-dependent adaptation...
September 12, 2017: Comprehensive Physiology
https://www.readbyqxmd.com/read/28910701/biomechanical-analysis-of-lumbar-decompression-surgery-in-relation-to-degenerative-changes-in-the-lumbar-spine-validated-finite-element-analysis
#3
Quan You Li, Ho-Joong Kim, Juhyun Son, Kyoung-Tak Kang, Bong-Soon Chang, Choon-Ki Lee, Hyun Sik Seok, Jin S Yeom
BACKGROUND: There are no studies about the biomechanical analysis of lumbar decompression surgery in relation to degenerative changes of the lumbar spine. Therefore, the purpose of this study was to compare, by using finite element (FE) analysis, the biomechanical changes of the lumbar spine in terms of annulus stress and nucleus pressure after two different kinds of lumbar decompression surgery in relation to disc degenerative changes. METHODS: The validated intact and degenerated FE models (L2-5) were used in this study...
September 6, 2017: Computers in Biology and Medicine
https://www.readbyqxmd.com/read/28894375/impact-of-t1-slope-on-surgical-and-adjacent-segment-degeneration-after-bryan-cervical-disc-arthroplasty
#4
Peng Yang, Yongqian Li, Jia Li, Yong Shen
BACKGROUND: This retrospective study investigated an association between preoperative T1 slope and surgical and adjacent segment degeneration (SASD) after Bryan cervical disc arthroplasty (BCDA) in patients with cervical degenerative disc disease. METHODS: Based on preoperative standing lateral radiographs, 90 patients were classified according to T1 slope that was higher or lower than the 50th percentile (high T1 or low T1, 28 and 62 patients, respectively). Patients were also classified as SASD or non-SASD (38 and 52 patients, respectively) determined by radiographs at final follow-up...
2017: Therapeutics and Clinical Risk Management
https://www.readbyqxmd.com/read/28882520/dynamic-foraminal-dimensions-during-neck-extension-and-rotation-in-fusion-and-artificial-disc-replacement-an-observational-study
#5
Yener N Yeni, Timothy Baumer, Daniel Oravec, Azam Basheer, Colin P McDonald, Michael J Bey, Stephen W Bartol, Victor Chang
BACKGROUND: Changes in the dimensions of the cervical neural foramina (CNF) are considered to be a key factor in nerve root compression and development of cervical radiculopathy. However, to what extent foraminal geometry differs between patients who underwent anterior cervical discectomy and fusion (ACDF) and those who underwent total disc arthroplasty with an artificial disc (AD) during physiological motion is largely unknown. PURPOSE: The objective of this study is to compare compare CNF dimensions during physiological neck motion between ACDF and AD...
September 4, 2017: Spine Journal: Official Journal of the North American Spine Society
https://www.readbyqxmd.com/read/28870839/long-term-clinical-results-following-charite-iii-lumbar-total-disc-replacement
#6
Shibao Lu, Siyuan Sun, Chao Kong, Wenzhi Sun, Hailiang Hu, Qingyi Wang, Yong Hai
BACKGROUND CONTEXT: The lumbar total disc replacement (TDR) operation represents an alternative to lumbar fusion for the treatment of symptomatic lumbar intervertebral disc degeneration, and has gained increasing attention in recent years. PURPOSE: To assess clinical outcomes in a cohort of patients with TDR and the long-term survival rate of the prostheses. STUDY DESIGN: A retrospective, single-center clinical study. PATIENT SAMPLE: Thirty patients with a total of 35 prostheses after an average follow-up (FU) of 15...
September 1, 2017: Spine Journal: Official Journal of the North American Spine Society
https://www.readbyqxmd.com/read/28863006/intervertebral-disc-degeneration-in-a-percutaneous-mouse-tail-injury-model
#7
Zuozhen Tian, Xiaoyuan Ma, Miersalijiang Yasen, Robert L Mauck, Ling Qin, Frances S Shofer, Lachlan J Smith, Maurizio Pacifici, Motomi Enomoto-Iwamoto, Yejia Zhang
OBJECTIVES: Intervertebral disc (IVD) degenerates progressively with age and after injuries. In this study, we aimed to characterize early molecular events underlying disc degeneration using a mouse tail IVD injury model. DESIGN: We have established a transcutaneous minimally invasive approach to induce mouse tail IVD injury under fluoroscopic guidance. Morphological and molecular changes in the injured IVDs are compared with the baseline features of adjacent intact levels...
August 31, 2017: American Journal of Physical Medicine & Rehabilitation
https://www.readbyqxmd.com/read/28853678/hpv-related-squamous-cell-carcinoma-in-a-neovagina-after-male-to-female-gender-confirmation-surgery
#8
Jesús Bollo, Andrea Balla, Carlos Rodriguez Luppi, Carmen Martinez, Silvia Quaresima, Eduard M Targarona
Vaginoplasty by penile and scrotal skin inversion is a well-established technique for male-to-female gender confirmation surgery. In this setting, chronic inflammation and lacerations associated with history of human papillomavirus (HPV) infection may induce a high risk of malignant degeneration in the long term. A 78-year-old transgender woman was admitted with genital discomfort and neovaginal discharge. The patient's history revealed male-to-female gender confirmation surgery with construction of a neovagina by penile and scrotal skin inversion at 33 years of age...
January 1, 2017: International Journal of STD & AIDS
https://www.readbyqxmd.com/read/28853606/impact-of-the-quantity-of-intradiscal-cement-leak-on-the-progression-of-intervertebral-disc-degeneration
#9
B Jamjoom, S Patel, R Bommireddy, Z Klezl
Introduction We aim to assess the impact of the quantity of intradiscal cement leak during kyphoplasty on the rate of progression of degenerative changes in the affected disc. Methods Of 316 kyphoplasty procedures, we identified 32 episodes of intradiscal cement leak in 26 patients. The quantity of cement leaked was graded from I to IV. Disc degenerative changes were assessed at presentation and follow-up using radiographical scoring and magnetic resonance imaging (MRI) grading systems. Data for low-grade leaks (grade I) were compared with the medium- and high-grade leaks (grades II-IV) using a chi-squared test...
September 2017: Annals of the Royal College of Surgeons of England
https://www.readbyqxmd.com/read/28846710/apparent-diffusion-coefficient-maps-in-the-assessment-of-surgical-patients-with-lumbar-spine-degeneration
#10
Evgenii Belykh, Andrey A Kalinin, Arpan A Patel, Eric J Miller, Michael A Bohl, Ivan A Stepanov, Liudmila A Bardonova, Talgat Kerimbaev, Anton O Asantsev, Morgan B Giers, Mark C Preul, Vadim A Byvaltsev
PURPOSE: To assess the utility of apparent diffusion coefficient (ADC) maps for the assessment of patients with advanced degenerative lumbar spine disease and describe characteristic features of ADC maps in various degenerative lumbar spinal conditions. METHODS: T1-weighted, T2-weighted and diffusion weighted (DWI) MR images of 100 consecutive patients admitted to the spinal surgery service were assessed. ADC maps were generated from DWI images using Osyrix software...
2017: PloS One
https://www.readbyqxmd.com/read/28836449/adjacent-joint-kinematics-after-ankle-arthrodesis-during-cadaveric-gait-simulation
#11
Daniel R Sturnick, Constantine A Demetracopoulos, Scott J Ellis, Robin M Queen, Jayme C B Kolstov, Jonathan T Deland, Josh R Baxter
BACKGROUND: Arthrodesis is an effective and reliable treatment for end-stage ankle arthritis; however, many patients develop ipsilateral adjacent joint arthritis following surgery. The mechanism that drives adjacent joint arthritis remains uncertain. Cadaveric simulation permits direct investigation of the effects of both arthrodesis and movement strategy on adjacent joints during simulated walking. The objective of this study was to identify the isolated effect of ankle arthrodesis on adjacent joint kinematics during simulated walking...
August 1, 2017: Foot & Ankle International
https://www.readbyqxmd.com/read/28816821/adjacent-segment-disease-after-cervical-spine-fusion-evaluation-of-a-70-patient-long-term-follow-up
#12
Mohamed Alhashash, Mootaz Shousha, Heinrich Boehm
STUDY DESIGN: A retrospective study of 70 patients undergoing surgical treatment for adjacent segment disease (ASD) after anterior cervical decompression and fusion (ACDF). OBJECTIVES: To analyze the risk factors for the development of ASD in patients who underwent ACDF. SUMMARY OF BACKGROUND DATA: ACDF has provided a high rate of clinical success for the cervical degenerative disc disease; nevertheless, adjacent segment degeneration has been reported as a complication at the adjacent level secondary to the rigid fixation...
August 14, 2017: Spine
https://www.readbyqxmd.com/read/28813619/age-related-changes-in-the-chorioretinal-junction-an-immunohistochemical-study
#13
Tulika Gupta, Narbada Saini, Jasbir Arora, Daisy Sahni
The chorioretinal junction comprises the retinal pigment epithelium, Bruch's membrane (BM), and adjacent choroidal capillaries. Its significance lies in its ability to support the retina mechanically and metabolically. The aim of this cross-sectional study was to record the senescent changes affecting all the constituents of the chorioretinal junction in 40 histological specimens across the whole spectrum of the adult age range. This study included light microscopy, with hematoxylin and eosin and PAS stains, and fluorescent microscopy...
August 1, 2017: Journal of Histochemistry and Cytochemistry: Official Journal of the Histochemistry Society
https://www.readbyqxmd.com/read/28799836/erratum-reduction-in-adjacent-segment-degeneration-after-multilevel-posterior-lumbar-interbody-fusion-with-proximal-diam-implantation
#14
Kang Lu
No abstract text is available yet for this article.
August 11, 2017: Journal of Neurosurgery. Spine
https://www.readbyqxmd.com/read/28799804/morphologic-features-of-spontaneous-annular-tears-and-disc-degeneration-in-the-aging-sand-rat-psammomys-obesus-obesus
#15
H E Gruber, E N Hanley
The sand rat, a member of the gerbil family, is a valuable small animal model in which intervertebral disc degeneration occurs spontaneously as the animal ages. Radiographic features of cervical and lumbar degeneration resemble those in human spines. We conducted a retrospective analysis of spines of 140 animals 3-41 months old focusing specifically on the presence of annular tears that are not visible by radiography and have not been described previously in the sand rat disc. During degeneration of the nucleus pulposus, notochordal cell death occurs and granular material, which stains with Alcian blue for proteoglycans, accumulates...
August 11, 2017: Biotechnic & Histochemistry: Official Publication of the Biological Stain Commission
https://www.readbyqxmd.com/read/28798534/a-case-of-spontaneous-purulent-granulomatous-pericarditis-in-a-beagle
#16
Kyohei Kamio, Yutaka Nakanishi, Kenta Matsue, Minoru Sasaki
The present report describes a case of spontaneous purulent granulomatous pericarditis in a 16-month-old beagle. A gross necropsy revealed pericardial effusion and multiple nodules on the surface of the heart and around the aorta adjacent to the heart. The cut surface of these nodules was solid and white in color, containing partially yellowish white regions. Microscopically, granulomatous inflammation characterized by central necrotic cellular debris surrounded by neutrophils, macrophages, lymphocytes, plasma cells, fibroblasts and collagen fibers was observed in the epicardium...
July 2017: Journal of Toxicologic Pathology
https://www.readbyqxmd.com/read/28797605/space-available-for-cord-motion-and-disc-degeneration-at-the-adjacent-segments-level-of-degenerative-cervical-spondylolisthesis-using-kinematic-mri
#17
Permsak Paholpak, Alexander Nazareth, Kaku Barkoh, Larry V Lee, Joshua Lucas, Zorica Buser, Jeffrey C Wang
The objective was to evaluate motion, disc degeneration and Space Available for Cord (SAC) at the adjacent segments of degenerative cervical spondylolisthesis (DCS) using kinematic Magnetic Resonance Imaging (kMRI). The cervical spine kMRI of sixty-one DCS spinal levels (38 anterolisthesis and 23 retrolisthesis) were analyzed at the listhesis level and its adjacent segments in three position using kMRI. MRAnalyzer3 was used to analyze translation, angular motion and SAC. The caudad level had significantly less translation motion than the listhesis level in overall DCS or grade 2 anterolisthesis group (P<0...
August 7, 2017: Journal of Clinical Neuroscience: Official Journal of the Neurosurgical Society of Australasia
https://www.readbyqxmd.com/read/28796075/muscle-gap-approach-under-a-minimally-invasive-channel-technique-for-treating-long-segmental-lumbar-spinal-stenosis-a-retrospective-study
#18
Yang Bin, Wang De Cheng, Wang Zong Wei, Li Hui
This study aimed to compare the efficacy of muscle gap approach under a minimally invasive channel surgical technique with the traditional median approach.In the Orthopedics Department of Traditional Chinese and Western Medicine Hospital, Tongzhou District, Beijing, 68 cases of lumbar spinal canal stenosis underwent surgery using the muscle gap approach under a minimally invasive channel technique and a median approach between September 2013 and February 2016. Both approaches adopted lumbar spinal canal decompression, intervertebral disk removal, cage implantation, and pedicle screw fixation...
August 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28767685/histone-deacetylase-inhibition-prevents-cell-death-induced-by-loss-of-tricellular-tight-junction-proteins-in-temperature-sensitive-mouse-cochlear-cells
#19
Kenichi Takano, Takuya Kakuki, Yakuto Kaneko, Takayuki Kohno, Shin Kikuchi, Tetsuo Himi, Takashi Kojima
Tricellular tight junctions (tTJs) are specialized structures that occur where the corners of three cells meet to seal adjacent intercellular space. The molecular components of tTJs include tricellulin (TRIC) and lipolysis-stimulated lipoprotein receptor (LSR) which recruits TRIC, are required for normal hearing. Although loss of TRIC causes hearing loss with degeneration of cochlear cells, the detailed mechanisms remains unclear. In the present study, by using temperature-sensitive mouse cochlear cells, US/VOT-E36 cell line, we investigated the changes of TRIC and LSR during cochlear cell differentiation and the effects of histone deacetylase (HDAC) inhibitors against cell degeneration induced by loss of TRIC and LSR...
2017: PloS One
https://www.readbyqxmd.com/read/28745679/-low-back-pain-and-modic-changes
#20
E L Sokov, L E Kornilova, A I Nesterov
Modic changes (MCh) are pathological changes in the bone marrow and the endplates of adjacent vertebrae characterized by bone marrow edema, fatty degeneration or osteosclerosis that are revealed by high-power field magnetic resonance imaging (MRI). The dominant disease pattern is a persistent back pain syndrome with varying intensity. It leads to difficulties in the interpretation of clinical data, evaluation of MRI data and treatment. The article presents a modern conception of the pathogenesis, classification, clinical implications and treatment of MCh based on national and foreign sources as well and the author's view on the osteogenic mechanism of the pathogenesis and treatment of MCh using intraosseous blockades...
2017: Zhurnal Nevrologii i Psikhiatrii Imeni S.S. Korsakova
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