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Chiari malformation type 1

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https://www.readbyqxmd.com/read/29142384/hypercapnic-respiratory-failure-in-case-of-chiari-1-5-malformation-case-report-and-review-of-the-literature
#1
Viralkumar M Vasani, Subhas Kanti Konar, S Satish
Type 2 respiratory failure is defined as hypercapnia associated with hypoxia. Chiari 1.5 is known as herniation of the cerebellar tonsils along with brain stem and fourth ventricle. We report a 35-year-old male who presented with acute hypercapnic respiratory failure (Type 2), without any preexisting neurological or respiratory abnormality. Analysis of blood gases in emergency revealed a pH of 7.12, pCO2 of 132 mmHg, and arterial oxygen tension of 118 mm Hg. He was intubated and ventilated. Magnetic resonance imaging brain revealed herniation of the cerebellar tonsils along with brain stem and fourth ventricle...
October 2017: Indian Journal of Critical Care Medicine
https://www.readbyqxmd.com/read/29138073/comparision-of-results-between-posterior-fossa-decompression-with-and-without-duraplasty-for-the-surgical-treatment-of-chiari-malformation-type-i%C3%AF-a-systematic-review-and-meta-analysis
#2
REVIEW
Weiwei Lin, Guman Duan, Jinjin Xie, Jiashen Shao, Zhaoqi Wang, Baohua Jiao
BACKGROUND: Posterior fossa decompression without (PFD) or with duraplasty (PFDD) for the treatment of type 1 Chiari malformation (CM-I) is controversial. We thus did a systematic review and meta-analysis of studies to assess the effect on clinical and imaging improvement, operative time, complications and recurrence rate between PFD and PFDD in patients with CM-I. METHODS: We systematically searched PubMed, Embase, Cochrane, Web of Knowledge, and ClinicalTrials...
November 11, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/29125445/morphometric-and-volumetric-comparison-of-102-children-with-symptomatic-and-asymptomatic-chiari-malformation-type-i
#3
Siri Sahib S Khalsa, Ndi Geh, Bryn A Martin, Philip A Allen, Jennifer Strahle, Francis Loth, Desale Habtzghi, Aintzane Urbizu Serrano, Daniel McQuaide, Hugh J L Garton, Karin M Muraszko, Cormac O Maher
OBJECTIVE Chiari malformation Type I (CM-I) is typically defined on imaging by a cerebellar tonsil position ≥ 5 mm below the foramen magnum. Low cerebellar tonsil position is a frequent incidental finding on brain or cervical spine imaging, even in asymptomatic individuals. Nonspecific symptoms (e.g., headache and neck pain) are common in those with low tonsil position as well as in those with normal tonsil position, leading to uncertainty regarding appropriate management for many patients with low tonsil position and nonspecific symptoms...
November 10, 2017: Journal of Neurosurgery. Pediatrics
https://www.readbyqxmd.com/read/29125433/a-points-based-algorithm-for-prognosticating-clinical-outcome-of-chiari-malformation-type-i-with-syringomyelia-results-from-a-predictive-model-analysis-of-82-surgically-managed-adult-patients
#4
Sumit Thakar, Laxminadh Sivaraju, Kuruthukulangara S Jacob, Aditya Atal Arun, Saritha Aryan, Dilip Mohan, Narayanam Anantha Sai Kiran, Alangar S Hegde
OBJECTIVE Although various predictors of postoperative outcome have been previously identified in patients with Chiari malformation Type I (CMI) with syringomyelia, there is no known algorithm for predicting a multifactorial outcome measure in this widely studied disorder. Using one of the largest preoperative variable arrays used so far in CMI research, the authors attempted to generate a formula for predicting postoperative outcome. METHODS Data from the clinical records of 82 symptomatic adult patients with CMI and altered hindbrain CSF flow who were managed with foramen magnum decompression, C-1 laminectomy, and duraplasty over an 8-year period were collected and analyzed...
November 10, 2017: Journal of Neurosurgery. Spine
https://www.readbyqxmd.com/read/29104687/traumatic-transient-herniation-concomitant-with-tonsillar-hemorrhagic-contusion-in-a-child
#5
Ahmet Öğrenci, Orkun Koban, Murat Ekşi, Onur Yaman, Sedat Dalbayrak
Downward displacement of cerebellar tonsils more than 5 mm below the foramen magnum is named as Chiari type I malformation and named benign tonsillar ectopia if herniation is less than 3 mm. It does not just depend on congenital causes. There are also some reasons for acquired Chiari Type 1 and benign tonsillar ectopia/herniation. Trauma is one of them. Trauma may increase tonsillar ectopia or may be the cause of new-onset Chiari type 1. The relationship between the tonsil contusion and its position is unclear...
October 15, 2017: Open Access Macedonian Journal of Medical Sciences
https://www.readbyqxmd.com/read/29066319/predictive-factors-of-headache-resolution-after-chiari-type-1-malformation-surgery
#6
Lou Grangeon, Laurent Puy, Vianney Gilard, Benjamin Hebant, Olivier Langlois, Stephane Derrey, Emmanuel Gerardin, David Maltete, Evelyne Guegan-Massardier, Nicolas Magne
No abstract text is available yet for this article.
October 21, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/29053075/machine-learning-applied-to-neuroimaging-for-diagnosis-of-adult-classic-chiari-malformation-role-of-the-basion-as-a-key-morphometric-indicator
#7
Aintzane Urbizu, Bryn A Martin, Dulce Moncho, Alex Rovira, Maria A Poca, Juan Sahuquillo, Alfons Macaya, Malena I Español
OBJECTIVE The current diagnostic criterion for Chiari malformation Type I (CM-I), based on tonsillar herniation (TH), includes a diversity of patients with amygdalar descent that may be caused by a variety of factors. In contrast, patients presenting with an overcrowded posterior cranial fossa, a key characteristic of the disease, may remain misdiagnosed if they have little or no TH. The objective of the present study was to use machine-learning classification methods to identify morphometric measures that help discern patients with classic CM-I to improve diagnosis and treatment and provide insight into the etiology of the disease...
October 20, 2017: Journal of Neurosurgery
https://www.readbyqxmd.com/read/29027876/intradural-pathology-and-pathophysiology-associated-with-chiari-i-malformation-in-children-and-adults-with-and-without-syringomyelia
#8
Brian J Dlouhy, Jeffrey D Dawson, Arnold H Menezes
OBJECTIVE The pathophysiology underlying tonsillar herniation and CSF obstruction in Chiari malformation Type I (CM-I) is unclear, and the cause of CM-I-associated syringomyelia is not well understood. A better understanding of this pathophysiology is important for an improved treatment strategy. Therefore, the authors sought to identify, characterize, and examine the intradural pathology and CSF flow pathophysiology in the posterior fossa and at the level of the foramen magnum that occurs in the setting of CM-I...
October 13, 2017: Journal of Neurosurgery. Pediatrics
https://www.readbyqxmd.com/read/29018653/chiari-type-1-malformation-induced-intracranial-hypertension-with-diffuse-brain-edema-treated-with-foramen-magnum-decompression-a-case-report
#9
Toshiki Fukuoka, Yusuke Nishimura, Masahito Hara, Shoichi Haimoto, Kaoru Eguchi, Satoshi Yoshikawa, Toshihiko Wakabayashi, Howard J Ginsberg
Chiari type 1 malformation (CM1) rarely causes papilloedema, which is indicative of high intracranial pressure with or without ventricular dilatation. Furthermore, concomitant brain parenchymal abnormalities have not been reported to date. In this paper, the authors report on a young woman of CM1-induced intracranial hypertension (ICH) with diffuse brain edema with a focus on venous sinus assessment, and discuss the surgical strategy. A 24-year-old woman presented to Nagoya University Hospital complaining of 4-year history of severe occipital headache and blurry vision with slowly progressive worsening...
October 2017: NMC Case Rep J
https://www.readbyqxmd.com/read/28969239/magnetic-resonance-imaging-in-paediatric-spinal-dysraphism-with-comparative-usefulness-of-various-magnetic-resonance-sequences
#10
Deepakkumar Vinodary Mehta
INTRODUCTION: Spinal dysraphism occurs due to failure of fusion of parts along dorsal aspect of midline structures lying along spinal axis from skin to vertebrae and spinal cord. Congenital spinal anomalies may be minimal and asymptomatic like spinal bifida occulta, or severe with marked neurological deficits like Arnold-Chiari malformation or caudal regression syndrome. Magnetic Resonance Imaging (MRI) is the modality of choice to diagnose mild to severe spinal dysraphism. AIM: To diagnose type and extent of clinically suspected spinal anomalies by MRI scan and to compare various sequences for identifying neural tissue and fatty tissue in anomalies...
August 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28885133/the-addition-of-duraplasty-to-posterior-fossa-decompression-in-the-surgical-treatment-of-pediatric-chiari-malformation-type-i-a-systematic-review-and-meta-analysis-of-surgical-and-performance-outcomes
#11
REVIEW
Victor M Lu, Kevin Phan, Sean P Crowley, David J Daniels
OBJECTIVE Surgery is the definitive treatment of Chiari malformation Type I (CM-I). It involves posterior fossa decompression, which can be performed along with C-1 laminectomy, reconstructive duraplasty, or tonsil shrinkage. The aim of this study was to provide an updated systematic review and meta-analysis of the latest available evidence regarding posterior fossa decompression only (PFDO) versus posterior fossa decompression with duraplasty (PFDD) in the treatment of CM-I in children. METHODS A literature search was performed in compliance with the PRISMA (Preferred Reporting Items for Systematic Reviews and Meta-Analyses) guidelines for article identification, screening, eligibility, and inclusion...
November 2017: Journal of Neurosurgery. Pediatrics
https://www.readbyqxmd.com/read/28867320/complete-reversibility-of-the-chiari-type-ii-malformation-following-post-natal-repair-of-myelomeningocele
#12
P A Beuriat, A Szathmari, C Rousselle, I Sabatier, F di Rocco, C Mottolese
INTRODUCTION: It was believed that Chiari type II malformation (CM-II) was always present in a myelomeningocele (MMC). In fact, it is associated in about 80 % of cases. Improvement of the hindbrain herniation after prenatal closure of MMC has challenged the idea that this condition was irreversible. Only two studies report ascent of the cerebellar tonsil after post-natal closure. This work aimed to study a large group of MMC patients who benefitted from a post-natal repair to evaluate the rate of long-term total reversibility of CM-II...
August 31, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28863007/intraoperative-neurophysiologic-monitoring-for-prediction-of-postoperative-neurological-improvement-in-a-child-with-chiari-type-i-malformation
#13
Yukari Kawasaki, Susumu Uchida, Kouhei Onishi, Masako Toyokuni, Kazuo Okanari, Minoru Fujiki
INTRODUCTION: Although many surgical treatment strategies for Chiari malformation type I (CM-I) have been reported, the most appropriate surgical technique remains controversial. It is wholly ascribable to the complicacy of pathological condition in CM-I. Recently, intraoperative neurophysiologic monitoring (INM) is becoming prevalent in spinal surgery. Indeed, motor-evoked potentials (MEPs) monitoring and somatosensory-evoked potentials (SSEPs) monitoring are standard tools to minimize the risk of neurologic injury and postoperative deficits...
October 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28838875/comparison-of-porcine-and-bovine-collagen-dural-substitutes-in-posterior-fossa-decompression-for-chiari-i-malformation-in-adults
#14
Christine K Lee, Tara Mokhtari, Ian D Connolly, Gordon Li, Lawrence M Shuer, Steven D Chang, Gary K Steinberg, Melanie Hayden Gephart
BACKGROUND: Posterior fossa decompression surgeries for Chiari malformations are susceptible to post-operative complications such as pseudomeningocele, external cerebrospinal fluid (CSF) leak, and meningitis. Various dural substitutes have been employed to improve surgical outcomes. OBJECTIVE: This study examined whether the collagen matrix dural substitute type correlated with the incidence of post-operative complications following posterior fossa decompression in adult patients with Chiari I malformations...
August 21, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28838117/technique-for-mini-open-decompression-of-chiari-type-i-malformation-in-adults
#15
Peyman Pakzaban
BACKGROUND: The technique for decompression of Chiari type I malformation relies on open exposure of craniocervical junction for suboccipital craniectomy and upper cervical laminectomy with or without duraplasty. There is no detailed technical report of a minimally invasive approach for Chiari decompression in adults. OBJECTIVE: To describe a mini-open technique for decompression of Chiari type I malformation (including duraplasty) in adults. METHODS: Six consecutive adult patients with symptomatic Chiari type I malformation underwent decompression through a 3 to 4 cm midline incision via a speculum retractor...
August 1, 2017: Operative Neurosurgery (Hagerstown, Md.)
https://www.readbyqxmd.com/read/28734813/incidence-and-types-of-pediatric-nystagmus
#16
David L Nash, Nancy N Diehl, Brian G Mohney
PURPOSE: To report the incidence, prevalent subtypes, and clinical characteristics of pediatric nystagmus diagnosed over a 30-year period. DESIGN: Retrospective, population-based study. METHODS: Using the Rochester Epidemiology Project, we reviewed the medical records of all children (<19 years) diagnosed as residents in Olmsted County, Minnesota, with any form of nystagmus from January 1, 1976, through December 31, 2005. RESULTS: Seventy-one children were diagnosed during the 30-year period, yielding an annual incidence of 6...
October 2017: American Journal of Ophthalmology
https://www.readbyqxmd.com/read/28732419/evolution-of-different-surgical-treatment-techniques-for-management-and-improving-outcome-of-chiari-malformation-type-1
#17
LETTER
Guru Dutta Satyarthee
No abstract text is available yet for this article.
August 2017: World Neurosurgery
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
#18
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/28690584/decompression-in-chiari-malformation-clinical-ocular-motor-cerebellar-and-vestibular-outcome
#19
Nicolina Goldschagg, Katharina Feil, Franziska Ihl, Siegbert Krafczyk, Mathias Kunz, Jörg Christian Tonn, Michael Strupp, Aurelia Peraud
BACKGROUND: Treatment of Chiari malformation can include suboccipital decompression with resection of one cerebellar tonsil. Its effects on ocular motor and cerebellar function have not yet been systematically examined. OBJECTIVE: To investigate whether decompression, including resection of one cerebellar tonsil, leads to ocular motor, vestibular, or cerebellar deficits. PATIENTS AND METHODS: Ten patients with Chiari malformation type 1 were systematically examined before and after (1 week and 3 months) suboccipital decompression with unilateral tonsillectomy...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/28686331/neural-tube-defects-in-waardenburg-syndrome-a-case-report-and-review-of-the-literature
#20
Joseph Hart, Kalpana Miriyala
Waardenburg syndrome type 1 (WS1) is an autosomal dominant genetic condition characterized by sensorineural deafness and pigment abnormalities, and is caused by variants in the PAX3 homeodomain. PAX3 variants have been associated with severe neural tube defects in mice and humans, but the frequency and clinical manifestations of this symptom remain largely unexplored in humans. Consequently, the role of PAX3 in human neural tube formation remains a study of interest, for clinical as well as research purposes...
July 7, 2017: American Journal of Medical Genetics. Part A
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