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https://www.readbyqxmd.com/read/28807779/syringo-subarachnoid-shunt-for-the-treatment-of-persistent-syringomyelia-following-decompression-for-chiari-type-i-malformation-surgical-results
#1
Jehuda Soleman, Jonathan Roth, Andrea Bartoli, Daniel Rosenthal, Akiva Korn, Shlomi Constantini
BACKGROUND: Approximately 30% of patients treated by foramen magnum decompression (FMD) for Chiari I-associated-syringomyelia will show persistence, recurrence, or progression of the syrinx. OBJECTIVE: This study evaluates the clinical and radiological outcome of syringo-subarachnoid shunt (SSS) as the treatment for persistent syringomyelia after FMD. METHODS: Data was collected retrospectively. The primary outcome measurement was neurological function (assessed with the Modified Japanese Orthopedic Association (mJOA) scale)...
August 11, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28799016/intraparenchymal-intracranial-pressure-monitoring-for-hydrocephalus-and-cerebrospinal-fluid-disorders
#2
Aswin Chari, Debayan Dasgupta, Alexander Smedley, Claudia Craven, Edward Dyson, Samir Matloob, Simon Thompson, Lewis Thorne, Ahmed K Toma, Laurence Watkins
BACKGROUND: Elective intraparenchymal intracranial pressure (ICP) monitoring is useful for the diagnosis and treatment of hydrocephalus and cerebrospinal fluid (CSF) disorders. This retrospective study analyzes median ICP and pulse amplitude (PA) recordings in neurosurgically naïve patients undergoing elective ICP monitoring for suspected CSF disorders. METHODS: Retrospective review of prospectively collated database of neurosurgically naïve patients undergoing elective ICP monitoring for suspected hydrocephalus and CSF disorders...
August 10, 2017: Acta Neurochirurgica
https://www.readbyqxmd.com/read/28768878/controllable-biomimetic-birdsong
#3
Aryesh Mukherjee, Shreyas Mandre, L Mahadevan
Birdsong is the product of the controlled generation of sound embodied in a neuromotor system. From a biophysical perspective, a natural question is that of the difficulty of producing birdsong. To address this, we built a biomimetic syrinx consisting of a stretched simple rubber tube through which air is blown, subject to localized mechanical squeezing with a linear actuator. A large static tension on the tube and small dynamic variations in the localized squeezing allow us to control transitions between three states: a quiescent state, a periodic state and a solitary wave state...
August 2017: Journal of the Royal Society, Interface
https://www.readbyqxmd.com/read/28751514/syringomyelia-fluid-dynamics-and-cord-motion-revealed-by-serendipitous-null-point-artifacts-during-cine-mri
#4
C M Honey, K W Martin, M K S Heran
Dynamic MR imaging was used to evaluate a cervical syrinx in an adolescent boy with an associated hindbrain herniation. Null artifacts were present on one of the sequences that allowed simultaneous high-resolution visualization of syrinx fluid motion and the anatomy of the syrinx walls. A brief review of the theories of syrinx formation and propagation is provided with a comment on why the Williams "slosh" theory of syrinx progression is supported by our unique imaging.
July 27, 2017: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/28729294/characteristics-of-csf-velocity-time-profile-in-posttraumatic-syringomyelia
#5
J Yeo, S Cheng, S Hemley, B B Lee, M Stoodley, L Bilston
BACKGROUND AND PURPOSE: The development of syringomyelia has been associated with changes in CSF flow dynamics in the spinal subarachnoid space. However, differences in CSF flow velocity between patients with posttraumatic syringomyelia and healthy participants remains unclear. The aim of this work was to define differences in CSF flow above and below a syrinx in participants with posttraumatic syringomyelia and compare the CSF flow with that in healthy controls. MATERIALS AND METHODS: Six participants with posttraumatic syringomyelia were recruited for this study...
July 20, 2017: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/28725401/sky-island-bird-populations-isolated-by-ancient-genetic-barriers-are-characterized-by-different-song-traits-than-those-isolated-by-recent-deforestation
#6
Chetana B Purushotham, V V Robin
Various mechanisms of isolation can structure populations and result in cultural and genetic differentiation. Similar to genetic markers, for songbirds, culturally transmitted sexual signals such as breeding song can be used as a measure of differentiation as songs can also be impacted by geographic isolation resulting in population-level differences in song structure. Several studies have found differences in song structure either across ancient geographic barriers or across contemporary habitat barriers owing to deforestation...
October 2016: Ecology and Evolution
https://www.readbyqxmd.com/read/28712735/spontaneous-regression-of-post-traumatic-syringomyelia-a-case-report-and-literature-review
#7
Monish M Maharaj, Kevin Phan, Ralph Mobbs
Syringomyelia defines a condition in which myelopathy develops secondary to the formation of a cyst or cavity within the spinal cord parenchyma known as a syrinx. Although there is a significant volume of studies analysing the underlying mechanisms behind their formation, the management of such cavities remains an ongoing topic of debate. Aside from conservative approach, a range of surgical options exist, however long term outcomes are poor and a literature search reveals that the overall benefits are questionable...
July 13, 2017: Journal of Clinical Neuroscience: Official Journal of the Neurosurgical Society of Australasia
https://www.readbyqxmd.com/read/28693072/-comparison-of-posterior-fossa-decompression-with-and-without-duraplasty-for-surgical-management-for-adult-chiari-malformation-type-%C3%A2
#8
H Y Li, Y M Li, H Chen, Y Li, X W Shi
Objective: To evaluate and compare the efficacy between posterior fossa decompression without duraplasty (PFD) and posterior fossa decompression with duraplasty (PFDD) in the surgical management for adult Chiari Ⅰ malformation. Methods: Fifty-seven patients suffered from Chiari malformation type Ⅰ were treated in Department of Neurosurgery, Henan Provincial People's Hospital from August 2008 to October 2013. Twenty-three patients received posterior fossa decompression without duraplasty and the other 34 patients received posterior fossa decompression with duraplasty...
July 4, 2017: Zhonghua Yi Xue za Zhi [Chinese medical journal]
https://www.readbyqxmd.com/read/28684453/syringohydromyelia-in-patients-with-chiari-i-malformation-a-retrospective-analysis
#9
K A Gad, D M Yousem
BACKGROUND AND PURPOSE: The association of syringohydromyelia with Chiari I malformation has a wide range, between 23% and 80% of cases in the current literature. In our experience, this range might be overestimated compared with our observations in clinical practice. Because there is an impact of Chiari I malformation-associated syringohydromyelia on morbidity and surgical intervention, its diagnosis is critical in this patient population. Identifying related variables on the basis of imaging would also help identify those patients at risk of syrinx formation during their course of disease...
July 6, 2017: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/28639826/imaging-appearance-of-advanced-chronic-adhesive-arachnoiditis-a-retrospective-review
#10
Tara L Anderson, Jonathan M Morris, John T Wald, Amy L Kotsenas
OBJECTIVE: Chronic adhesive arachnoiditis (CAA) is rare and has potentially devastating clinical consequences. The objective of this article is to review the clinical features of CAA and describe its appearance on imaging, to increase radiologists' awareness of this challenging diagnosis. MATERIALS AND METHODS: Twenty-nine cases of advanced CAA seen at our institution over 18 years (1995-2013) were retrospectively reviewed. Chart review was performed, with attention given to data on clinical presentation, suspected cause, and interventions performed...
June 22, 2017: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/28637121/iatrogenic-syringomyelia-secondary-to-lumboperitoneal-shunt-altered-by-the-raised-intra-abdominal-pressure-of-pregnancy
#11
James Kersey, William Cato-Addison, Damian Holliman
We report a case of a 37 year old female with syringomyelia secondary to lumboperitoneal (LP) shunt. Syrinx regression occurred with raised intra-abdominal pressure due to pregnancy and subsequently redeveloped after parturition. To our knowledge a case of pregnancy associated syringomyelia regression has not been previously reported.
March 6, 2017: British Journal of Neurosurgery
https://www.readbyqxmd.com/read/28637118/asymptomatic-chiari-type-i-malformation-should-patients-be-advised-against-participation-in-contact-sports
#12
Robert Spencer, Paul Leach
BACKGROUND: Chiari type I malformation (CM-I) is characterised by caudal displacement of the cerebellar tonsils through the foramen magnum, crowding the craniocervical junction. It is being increasingly diagnosed in asymptomatic patients due to the widespread availability of MRI, and there are case reports of these patients suffering sudden death or neurological injury following head or neck trauma, raising the issue of whether they should be prohibited from contact sport participation, given the likelihood of frequent trauma...
March 2, 2017: British Journal of Neurosurgery
https://www.readbyqxmd.com/read/28637109/closing-the-dura-dural-hitching-versus-surgicel-and-tisseel-overlay-graft-in-craniocervicaldecompression-for-chiari-1-malformation
#13
Michael Tonkins, Naeem Farooqi, Rohan Ahmed, Saurabh Sinha, Debapriya Bhattacharyya
BACKGROUND: This study compares dural hitching to surgicel and tisseel overlay graft following craniocervical decompression and C1 laminectomy with simple durotomy for Chiari I malformation. Outcome measures were syrinx decompression, headache resolution and complication rates. METHODS: A retrospective analysis of case notes was conducted. Patients who had undergone craniocervical decompression (CCD) were grouped by method of dural closure. Outcomes compared were rates of syrinx decompression, headache resolution, and post-operative complications...
March 2, 2017: British Journal of Neurosurgery
https://www.readbyqxmd.com/read/28598915/anesthetic-and-obstetric-management-of-syringomyelia-during-labor-and-delivery-a-case-series-and-systematic-review
#14
Gráinne Patricia Garvey, Vibhangini S Wasade, Kellie E Murphy, Mrinalini Balki
BACKGROUND: Syringomyelia is a rare, slowly progressive neurological condition characterized by the presence of a syrinx within the spinal cord. Consensus regarding the safest mode of delivery and anesthetic management in patients with syringomyelia remains controversial and presents management dilemmas. This study reviews the cases of syringomyelia at our institution and provides a systematic review of the literature to guide decisions regarding labor and delivery management. METHODS: A retrospective review of cases at our hospital from 2002 to 2014 and a systematic review of the literature from 1946 to 2014 were undertaken...
September 2017: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/28596213/chamber-music-an-unusual-helmholtz-resonator-for-song-amplification-in-a-neotropical-bush-cricket-orthoptera-tettigoniidae
#15
Thorin Jonsson, Benedict D Chivers, Kate Robson Brown, Fabio A Sarria-S, Matthew Walker, Fernando Montealegre-Z
Animals use sound for communication, with high-amplitude signals being selected for attracting mates or deterring rivals. High amplitudes are attained by employing primary resonators in sound-producing structures to amplify the signal (e.g. avian syrinx). Some species actively exploit acoustic properties of natural structures to enhance signal transmission by using these as secondary resonators (e.g. tree-hole frogs). Male bush-crickets produce sound by tegminal stridulation and often use specialised wing areas as primary resonators...
August 15, 2017: Journal of Experimental Biology
https://www.readbyqxmd.com/read/28587601/cavalier-king-charles-spaniels-with-chiari-like-malformation-and-syringomyelia-have-increased-variability-of-spatio-temporal-gait-characteristics
#16
Emil Olsen, Emma Jane Suiter, Thilo Pfau, Imelda M McGonnell, Kaspar Matiasek, Anna Giejda, Holger Andreas Volk
BACKGROUND: Chiari-like malformation in the Cavalier King Charles Spaniel is a herniation of the cerebellum and brainstem into or through the foramen magnum. This condition predisposes to Syringomyelia; fluid filled syrinxes within the spinal cord. The resulting pathology in spinal cord and cerebellum create neuropathic pain and changes in gait. This study aims to quantify the changes in gait for Cavalier King Charles Spaniel with Chiari-like malformation and Syringomyelia. METHODS: We compared Cavalier King Charles Spaniel with Chiari-like malformation with (n = 9) and without (n = 8) Syringomyelia to Border Terriers (n = 8)...
June 6, 2017: BMC Veterinary Research
https://www.readbyqxmd.com/read/28586935/endoscopic-management-of-arnold-chiari-malformation-type-i-with-or-without-syringomyelia
#17
Shailendra Ratre, Nishtha Yadav, Yad Ram Yadav, Vijay Singh Parihar, Jitin Bajaj, Yatin Kher
Introduction Several different surgical techniques have been used in the treatment of patients with symptomatic Arnold-Chiari malformation type 1 (ACM-1) with or without syrinx. Endoscope-assisted decompression of the posterior fossa has been found to be safe and effective. We report our initial experience of endoscopic management of ACM-I. Material and Methods This was a prospective study of 15 symptomatic patients. Pre- and postoperative clinical status and computed tomography and magnetic resonance imaging findings were recorded...
June 6, 2017: Journal of Neurological Surgery. Part A, Central European Neurosurgery
https://www.readbyqxmd.com/read/28583457/vertebrobasilar-insufficiency-due-to-distal-posterior-inferior-cerebellar-artery-compression-in-chiari-1-5
#18
M Burhan Janjua, Iryna Ivasyk, Jeffrey P Greenfield
BACKGROUND: Chiari malformation is characterized by radiographic evidence of herniation of cerebellar tonsils below the foramen magnum and a symptom complex of headaches; breathing, swallowing, or sleep difficulties; ataxia; restless; and motor and/or sensory deficits. CASE DESCRIPTION: We report a case of a 34-year-old woman whose imaging indicated a Chiari 1.5 with brainstem (caudal medulla) herniation and an expansive cervical syrinx. Her symptom complex showed signs both of cervical syringomyelia, as well as ones localizable to the medulla...
August 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28578118/clinical-and-radiologic-outcomes-following-fenestration-and-partial-wall-excision-of-idiopathic-intradural-spinal-arachnoid-cysts-presenting-with-myelopathy
#19
Vibhu Viswanathan, Sakthivel R Manoharan, Hyunwoo Do, Amy Minnema, Sophia M Shaddy, J Brad Elder, H Francis Farhadi
BACKGROUND: Intradural spinal arachnoid cysts (ISACs) with associated neurologic deficits are infrequently encountered. Various management strategies have been proposed with minimal data on comparative outcomes. OBJECTIVE: We describe the clinical and radiologic presentation as well as the outcomes of 14 surgically managed patients who presented with an ISAC and associated myelopathy. METHODS: We retrospectively reviewed the clinical course of consecutive patients presenting with neurologic deficits associated with idiopathic ISACs at our institution...
May 31, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28566405/intraspinal-anomalies-in-early-onset-idiopathic-scoliosis
#20
E A C Pereira, M Oxenham, K S Lam
AIMS: In the United Kingdom, lower incidences of intraspinal abnormalities in patients with early onset idiopathic scoliosis have been observed than in studies in other countries. We aimed to determine the rates of these abnormalities in United Kingdom patients diagnosed with idiopathic scoliosis before the age of 11 years. PATIENTS AND METHODS: This retrospective study of patients attending an urban scoliosis clinic identified 71 patients satisfying a criteria of: clinical diagnosis of idiopathic scoliosis; age of onset ten years and 11 months or less; MRI screening for intraspinal abnormalities...
June 2017: Bone & Joint Journal
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