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Disc pathology

Fantin Girard, Conrad Kavalec, Farida Cheriet
Optic disc (OD) appearance in fundus images is one of the clinical indicators considered in the assessment of retinal diseases such as glaucoma. The cup-to-disc ratio (CDR) is the most common clinical measurement used to characterize glaucoma. However, the CDR only evaluates the relative sizes of the cup and the OD via their diameters. We propose to construct an atlas-based shape descriptor (ASD) to statistically characterize the geometric deformations of the OD shape and of the blood vessels' configuration inside the OD region...
January 2018: Journal of Medical Imaging
Andrew G Lee, Thomas H Mader, C Robert Gibson, Tyson J Brunstetter, William J Tarver
Interesting novel and somewhat perplexing physiologic and pathologic neuro-ocular findings have been documented in astronauts during and after long duration space flight (LDSF). These findings collectively have been termed the "space flight-associated neuro-ocular syndrome" (SANS). The National Aeronautics and Space Administration (NASA) in the United States has meticulously and prospectively documented the clinical, ultrasound, optical coherence tomography imaging, and radiographic findings of SANS including unilateral and bilateral optic disc edema, globe flattening, choroidal and retinal folds, hyperopic refractive error shifts, and nerve fiber layer infarcts (i...
March 12, 2018: Eye
Ji Tu, Wentian Li, Shuai Li, Wei Liu, Yukun Zhang, Xinghuo Wu, Rongjin Luo, Wenbin Hua, Kun Wang, Yu Song, Liang Kang, Wen Yang, Shuhua Yang, Cao Yang
BACKGROUND/AIMS: Intervertebral disc degeneration (IDD) is a pathological process that is the primary cause of low back pain and is potentially mediated by compromised stress defense. Sestrins (Sesn) promote cell survival under stress conditions and regulate AMP-activated protein kinase (AMPK) and mammalian target of rapamycin (mTOR) signaling. Here, we investigated the expression of Sesn in normal and degraded nucleus pulposus (NP) cells and its potential roles during IDD pathogenesis...
March 2, 2018: Cellular Physiology and Biochemistry
Chencheng Feng, Minghui Yang, Yang Zhang, Minghong Lan, Bo Huang, Huan Liu, Yue Zhou
Intervertebral disc (IVD) degeneration (IDD) is a widely recognized contributor to low back pain. Mechanical stress is a crucial etiological factor of IDD. During the process of IDD, a vicious circle is formed between abnormal mechanical stress and the damage of disc structure and function. Notably, the pathological process of IDD is mediated by the phenotypic shift of IVD cells from an extracellular matrix anabolic phenotype to a catabolic and pro-inflammatory phenotype. Therefore, the effects of mechanical stress on the initiation and progression of IDD depend on the mechanobiology of IVD cells...
February 28, 2018: International Journal of Molecular Medicine
Bieke Vanslembrouck, Anna Kremer, Benjamin Pavie, Frans van Roy, Saskia Lippens, Jolanda van Hengel
The intercalated disc (ID) contains different kinds of intercellular junctions: gap junctions (GJs), desmosomes and areae compositae, essential for adhesion and communication between adjacent cardiomyocytes. The junctions can be identified based on their morphology when imaged using transmission electron microscopy (TEM), however, only with very limited information in the z-dimension. The application of volume EM techniques can give insight into the three-dimensional (3-D) organization of complex biological structures...
March 5, 2018: Histochemistry and Cell Biology
Zhixi Li, Yifan He, Stuart Keel, Wei Meng, Robert T Chang, Mingguang He
PURPOSE: To assess the performance of a deep learning algorithm for detecting referable glaucomatous optic neuropathy (GON) based on color fundus photographs. DESIGN: A deep learning system for the classification of GON was developed for automated classification of GON on color fundus photographs. PARTICIPANTS: We retrospectively included 48 116 fundus photographs for the development and validation of a deep learning algorithm. METHODS: This study recruited 21 trained ophthalmologists to classify the photographs...
March 2, 2018: Ophthalmology
Gilles Norotte, Carlos Barrios
OBJECTIVE: Recent improvements in cage designs with integral fixation and screw attachments have made stand-alone ALIF a viable option with several possible advantages. The aim of this study was to confirm the efficacy and safety of a PEEK cage filled with hydroxyapatite nanoparticles without adding a bone graft for stand-alone ALIF in the treatment of L5-S1 isolated degenerative disc discopathy (DDD). PATIENTS AND METHODS: Sixty-five patients who required surgery for DDD were evaluated...
January 31, 2018: Clinical Neurology and Neurosurgery
Yong-Peng Lin, Yong-Jin Li, Bo-Lai Chen, Yu-Hai Guo
RATIONALE: Adult spinal epidermoid cyst (SEC) is a rare tumor. Lumbar laminectomy and tumor removal was a routine surgical procedure for adult spinal epidermoid cyst according to the literature, but postoperative lumbar instability and intractable low back pain may occur. In this study, we presented a brief report of an adult lumbar epidermoid cyst and introduced another surgical approach. PATIENT CONCERNS: This 28-year-old woman has been complaining of the severe right buttock pain and right thigh radiating pain for half a year...
January 2018: Medicine (Baltimore)
Taku Inada, Sei Nishida, Taigo Kawaoka, Toshiyuki Takahashi, Junya Hanakita
Study Design: A retrospective study. Purpose: Our objectives were to determine the association between the pathological changes of disc herniation and the interval between primary and revision surgeries and to investigate the frequency and site of the dural laceration in the primary and revision surgeries. Overview of Literature: Among 382 patients who underwent microsurgical lumbar discectomy, we investigated 29 who underwent revision surgery to analyze recurrent herniation pathologies and complications to determine the manner in which lumbar disc herniation can be more efficiently managed...
February 2018: Asian Spine Journal
Aaron J Buckland, Bryan M Beaubrun, Evan Isaacs, John Moon, Peter Zhou, Sam Horn, Gregory Poorman, Jared C Tishelman, Louis M Day, Thomas J Errico, Peter G Passias, Themistocles Protopsaltis
Study Design: Retrospective radiological review. Purpose: To quantify the effect of sitting vs supine lumbar spine magnetic resonance imaging (MRI) and change in anterior displacement of the psoas muscle from L1-L2 to L4-L5 discs. Overview of Literature: Controversy exists in determining patient suitability for lateral lumbar interbody fusion (LLIF) based on psoas morphology. The effect of posture on psoas morphology has not previously been studied; however, lumbar MRI may be performed in sitting or supine positions...
February 2018: Asian Spine Journal
Denada Dibra, Xueqing Xia, Mihai Gagea, Guillermina Lozano, Shulin Li
Spondyloarthropathies, the second most frequently occurring form of chronic inflammatory arthritis, affects young adults in particular. However, a proper model with which to study the biology of this disease and to develop therapeutics is lacking. One of the most accepted animal models for this disease uses HLA-B27/Hu-β2m transgenic rats; however, only 30%-50% of male HLA-B27/Hu-β2m rats develop spontaneous, clinically apparent spondylitis and have a variable time until disease onset. Here, we report a high-incidence, low-variation spontaneous mouse model that delineates how the combination of inflammatory cytokine interleukin-27 (IL-27) signaling deficiency and mitogenic signaling (mutant p53R172H) in vivo, leads to bone loss in the vertebral bodies and ossification of the cartilage in the intervertebral discs...
2018: PloS One
Burak Yulug, Sema Brandmeier, Lutfu Hanoglu
BACKGROUND: The causal link between upper limb restlessness and cervical disc prolapsus is still unclear, and the exact role of the spinal cord in the origination of limb restlessness is not yet completely understood. METHODS: Here we have evaluated the therapeutic effect of pramipexole (0.5 mg/kg) in a 47-year old male with cervical disc prolapsus who described restlessness in his upper limb and neck. RESULTS: The patient felt significantly better, and his symptoms improved near to complete after five days after we have initiated 0...
February 27, 2018: Current Clinical Pharmacology
Margareta Nordin, Kristi Randhawa, Paola Torres, Hainan Yu, Scott Haldeman, O'Dane Brady, Pierre Côté, Carlos Torres, Michael Modic, Rajani Mullerpatan, Christine Cedraschi, Roger Chou, Emre Acaroğlu, Eric L Hurwitz, Nadège Lemeunier, Jean Dudler, Anne Taylor-Vaisey, Erkin Sönmez
PURPOSE: The purpose of this systematic literature review was to develop recommendations for the assessment of spine-related complaints in medically underserved areas with limited resources. METHODS: We conducted a systematic review and best evidence synthesis of guidelines on the assessment of spine-related complaints. Independent reviewers critically appraised eligible guidelines using the Appraisal of Guidelines for Research and Evaluation-II criteria. Low risk of bias clinical practice guidelines was used to develop recommendations...
February 28, 2018: European Spine Journal
Prashanth J Rao, Christine Chau, Kevin Phan, Ralph J Mobbs
OBJECTIVE: The role of bacterial infection in the causation of disc degeneration and its consequences is controversial. The current evidence is limited to underpowered studies, with the majority of such studies having only an internal contaminant arm, and only one study having a control arm with a non-degenerate disc population. The Degenerate-disc Infection Study with Contaminant Control (DISC) study includes a control arm and an internal contaminant control to resolve these shortcomings...
February 2018: Orthopaedic Surgery
Carla D Anania, Federico Pessina, Marco Alloisio, Maurizio Fornari, Emanuela Morenghi, Francesco Costa
BACKGROUND: In surgery, the learning process represents one of the critical topics in the development of a young surgeon, where there is often no standardized learning program. The learning curve is defined by plotting proficiency as a function of time, or the number of repetitions. In this study, we have analyzed the learning process for a rare and surgically demanding pathology such as thoracic disc herniations (TDHs) treated with an antero-lateral trans-thoracic approach. METHODS: We analyzed a consecutive series of patients admitted with a diagnosis of TDHs...
February 23, 2018: Journal of Neurosurgical Sciences
Viktor Zsolt Kovari, Laszlo Horvath
PURPOSE: This article presents a surgical solution of a lumbar disc hernia of a pregnant woman focusing on the use of right lateral positioning, spinal anesthesia which has not previously been utilized in third trimester and discusses positioning options, and possible anesthesia methods with the surgical procedure options. METHODS: Case report. RESULTS: A left-sided L5/S1 lumbar disc hernia (verified by magnetic resonance imaging) of a 35-year-old, 32-week-pregnant woman with a deteriorating neurological status leading to cauda syndrome was treated successfully by microdiscectomy in right lateral position applying spinal anesthesia...
February 22, 2018: European Spine Journal
Hongyu Tan, Liang Zhao, Ruipeng Song, Yilin Liu, Limin Wang
Aberrant nucleus pulposus cell proliferation is implicated in the development of intervertebral disc degeneration (IDD). Recent studies have suggested that long non-coding RNAs (lncRNAs) can modulate cell proliferation in several pathological conditions. Here, we indicated that the expression of SNHG1 was upregulated in IDD tissues compared to the control tissues and higher SNHG1 expression was associated with disc degeneration grade. In addition, we showed that ectopic expression of SNHG1 promoted nucleus pulposus (NP) cell proliferation and increased the PCNA and cyclin D1 expression in NP cell...
February 21, 2018: American Journal of Physiology. Cell Physiology
Shingo Miyazaki, Ashish D Diwan, Kenji Kato, Kevin Cheng, Won C Bae, Yang Sun, Junichi Yamada, Carol Muehleman, Mary E Lenz, Nozomu Inoue, Robert L Sah, Mamoru Kawakami, Koichi Masuda
PURPOSE: To elucidate the effects of growth differentiation factor-6 (GDF6) on: (i) gene expression of inflammatory/pain-related molecules and structural integrity in the rabbit intervertebral disc (IVD) degeneration model, and (ii) sensory dysfunction and changes in pain-marker expression in dorsal nerve ganglia (DRGs) in the rat xenograft radiculopathy model. METHODS: Forty-six adolescent rabbits received anular-puncture in two non-consecutive lumbar IVDs. Four weeks later, phosphate-buffered saline (PBS) or GDF6 (1, 10 or 100 µg) was injected into the nucleus pulposus (NP) of punctured discs and followed for 4 weeks for gene expression analysis and 12 weeks for structural analyses...
February 19, 2018: European Spine Journal
Joseph L Laratta, Jamal N Shillingford, Comron Saifi, K Daniel Riew
Study Design: Systematic review. Objectives: Degenerative disc disease and spondylosis resulting in radiculopathy and retrodiscal myelopathy are among the most frequently encountered cervical spinal disorders. Traditionally, anterior cervical discectomy and fusion (ACDF) has successfully achieved neural decompression and restored intradiscal height in these conditions. Unfortunately, nonunion and iatrogenic adjacent segment pathology associated with fusion procedures in the cervical spine has led to an interest in motion-preserving procedures...
February 2018: Global Spine Journal
Guillaume Christe, Toby Hall
Background: Thoracic disc herniations are rare and difficult to diagnose. Myelopathy is a potential consequence that can lead to irreversible neurological impairment if not treated appropriately. It is incumbent on all clinicians who see patients with low back pain (LBP) to be aware of such pathologies. This case describes a screening process in the detection of a rare serious spinal pathology and discusses the use of red flags and central nervous system signs and symptoms in the decision leading to immediate referral...
February 2018: Journal of Manual & Manipulative Therapy
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