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chiari malformation

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https://www.readbyqxmd.com/read/28342117/otto-mennicke-1876-and-the-first-description-of-skull-base-anomalies-causing-cerebellar-tonsillar-ectopia-one-of-the-first-mentions-of-the-chiari-i-malformation
#1
Fabian N Fries, Philipp Hendrix, Titus J Brinker, Marios Loukas, R Shane Tubbs
INTRODUCTION: Although Hans Chiari made significant and meaningful contributions to our understanding and classification of hindbrain herniations, others have also contributed to this knowledge. One figure who has been lost to history is Otto Mennicke. Herein, we discuss his role in our understanding of tonsillar ectopia and his life and connection to Hans Chiari. CONCLUSIONS: Our knowledge of what is now known as the Chiari malformations has been shaped by several clinicians including Otto Mennicke...
March 24, 2017: Child's Nervous System: ChNS: Official Journal of the International Society for Pediatric Neurosurgery
https://www.readbyqxmd.com/read/28328605/unusual-association-cerebral-arteriovenous-malformation-and-chiari-type-i-malformation
#2
Hayri Ogul, Mecit Kantarci
Cerebral arteriovenous malformation (AVM) is a common type of cerebral vascular malformation. The imaging findings are enlarged vessels, thrombosed sinuses, and hemorrhage or gliosis on adjacent brain parenchyma. Magnetic resonance (MR) imaging can be used safely for diagnosis. Chiari type I malformation is characterized by a caudal descent of the cerebellar tonsil. Coincidence of cerebral AVM and Chiari type I malformation is very rare. In this paper, the authors report MR imaging findings of a patient with coincidence of cerebral AVM and Chiari type I malformation...
March 21, 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28326451/application-of-endoscopic-third-ventriculostomy-for-treating-hydrocephalus-correlated-chiari-type-i-malformation-in-a-single-chinese-neurosurgery-centre
#3
Yiping Wu, Chuzhong Li, Xuyi Zong, Xinsheng Wang, Songbai Gui, Caiping Gu, Yazhuo Zhang
The correlation between hydrocephalus and Chiari type I malformation (CIM) has been debated since Chiari's first descriptions of CIM but some studies have shown that CIM and hydrocephalus (HCP) could cause symptoms/disease of each other or vice versa. Recent research has found that treatment focused on hydrocephalus with ventricle enlargement also provides alleviation of CIM and even of syringomyelia. However, the lack of consensus among previous studies left unanswered the question of how endoscopic third ventriculostomy (ETV) addresses CIM and why it fails...
March 22, 2017: Neurosurgical Review
https://www.readbyqxmd.com/read/28321315/prolonged-expiratory-apnoea-with-cyanosis-in-arnold-chiari-ii-malformation
#4
Adnan Zafar, Nahin Hussain
Apnoea associated with Arnold Chiari malformation is a known entity and can be obstructive or central. Differentiating between two types is vital to deciding management pathway and prognosticating disease process.
March 2017: JRSM Open
https://www.readbyqxmd.com/read/28296378/-type-i-chiari-malformation-associated-with-cerebellar-atrophy-case-report
#5
Luis Rafael Moscote-Salazar, Willem Guillermo Calderón-Miranda, Hernando Raphael Alvis-Miranda, Ángel Lee-Aguirre, Gabriel Alcalá-Cerra
Chiari malformation is characterized by caudal displacement of the cerebellar tonsils that penetrate into the spinal canal through the foramen magnum, achieving reach the atlas or axis. trunk and any drop of the fourth ventricle is observed. Typically is seen in young adults. In some cases scoliosis and Syringomyelic cavities may occur. The authors present (as far as they know) the first case in the literature with long term follow-up, of a caucasian woman with an unusual form of cerebellar atrophy and Chiari Type I malformation, suffering from weakness in his upper and lower extremities with rapidly progression...
March 2017: Revista Médica del Instituto Mexicano del Seguro Social
https://www.readbyqxmd.com/read/28291422/comparison-of-posterior-fossa-volumes-and-clinical-outcomes-after-decompression-of-chiari-malformation-type-i
#6
Siri Sahib S Khalsa, Alan Siu, Tiffani A DeFreitas, Justin M Cappuzzo, John S Myseros, Suresh N Magge, Chima O Oluigbo, Robert F Keating
OBJECTIVE Previous studies have indicated an association of Chiari malformation Type I (CM-I) and a small posterior fossa. Most of these studies have been limited by 2D quantitative methods, and more recent studies utilizing 3D methodologies are time-intensive with manual segmentation. The authors sought to develop a more automated tool to calculate the 3D posterior fossa volume, and correlate its changes after decompression with surgical outcomes. METHODS A semiautomated segmentation program was developed, and used to compare the pre- and postoperative volumes of the posterior cranial fossa (PCF) and the CSF spaces (cisterna magna, prepontine cistern, and fourth ventricle) in a cohort of pediatric patients with CM-I...
February 17, 2017: Journal of Neurosurgery. Pediatrics
https://www.readbyqxmd.com/read/28291403/a-rat-model-of-chronic-syringomyelia-induced-by-epidural-compression-of-the-lumbar-spinal-cord
#7
Ji Yeoun Lee, Shin Won Kim, Saet Pyoul Kim, Hyeonjin Kim, Jung-Eun Cheon, Seung-Ki Kim, Sun Ha Paek, Dachling Pang, Kyu-Chang Wang
OBJECTIVE There has been no established animal model of syringomyelia associated with lumbosacral spinal lipoma. The research on the pathophysiology of syringomyelia has been focused on Chiari malformation, trauma, and inflammation. To understand the pathophysiology of syringomyelia associated with occult spinal dysraphism, a novel animal model of syringomyelia induced by chronic mechanical compression of the lumbar spinal cord was created. METHODS The model was made by epidural injection of highly concentrated paste-like kaolin solution through windows created by partial laminectomy of L-1 and L-5 vertebrae...
February 17, 2017: Journal of Neurosurgery. Spine
https://www.readbyqxmd.com/read/28290397/endoscopic-technique-for-single-stage-anterior-decompression-and-anterior-fusion-by-transcervical-approach-in-atlantoaxial-dislocation
#8
Yad Ram Yadav, Shailendra Ratre, Vijay Parhihar, Amitesh Dubey, Neil M Dubey
Although posterior approaches are being used frequently in most atlantoaxial dislocations (AAD), anterior decompression is also required in some patients in whom the C1-2 dislocation is not properly reduced by the posterior approach. Transnasal and transoral approaches need an additional posterior approach to perform atlantoaxial fusion. They also have an added risk of infection. The endoscopic transcervical approach can be used for single-stage cervical decompression and stabilization that includes an odontoidectomy and anterior fusion...
March 2017: Neurology India
https://www.readbyqxmd.com/read/28286253/chiari-i-malformation-in-a-child-with-pten-hamartoma-tumor-syndrome-association-or-coincidence
#9
Veronica Saletti, Silvia Esposito, Angelo Maccaro, Sabrina Giglio, Laura Grazia Valentini, Luisa Chiapparini
PTEN hamartoma tumor syndrome (PHTS) refers to a group of clinical conditions caused by germline mutations in the PTEN tumor suppressor gene. Increasing evidence has documented that PHTS may be associated with a broader spectrum of structural brain abnormalities, including dysplastic gangliocytoma of the cerebellum, brain tumors, vascular malformations, white matter abnormalities, dilated perivascular spaces and cortical dysplasia. We report a PTEN-mutated child showing macrocephaly, mild intellectual disability and epilepsy symptomatic of right occipital polymicrogyria, who also developed Chiari I Malformation (CIM) that repeatedly required surgical correction...
March 7, 2017: European Journal of Medical Genetics
https://www.readbyqxmd.com/read/28283371/chiari-like-displacement-due-to-spontaneous-intracranial-hypotension-in-an-adolescent-successful-treatment-by-epidural-blood-patch
#10
Jan Schönberger, Markus Möhlenbruch, Angelika Seitz, Cornelia Bußmann, Heidi Bächli, Stefan Kölker
BACKGROUND: Spontaneous intracranial hypotension is a rarely diagnosed cause of headache, especially in children and adolescents. It is due to cerebrospinal fluid (CSF) leakage via spinal fistulae occurring without major trauma. CASE PRESENTATION: An adolescent patient presented with a 3-month history of strictly postural headache. Cranial magnetic resonance imaging (MRI) showed pronounced Chiari-like prolapse of the cerebellar tonsils, narrow ventricles and enlarged cerebral veins...
February 20, 2017: European Journal of Paediatric Neurology: EJPN
https://www.readbyqxmd.com/read/28279990/hindbrain-herniation-in-chiari-ii-malformation-on-fetal-and-postnatal-mri
#11
U D Nagaraj, K S Bierbrauer, B Zhang, J L Peiro, B M Kline-Fath
BACKGROUND AND PURPOSE: As the practice of in utero repair of myelomeningoceles becomes more prevalent, knowledge of the expected MR imaging findings has become increasingly important. Our aim was to examine neuroimaging findings with a focus on hindbrain herniation and ventricular size in fetuses with open spinal dysraphism and to compare them with postnatal imaging features in groups undergoing prenatal-versus-postnatal repair. MATERIALS AND METHODS: Single-center retrospective analysis was performed on MRIs of fetuses with open spinal dysraphism from January 2004 through July 2015 with available postnatal imaging...
March 9, 2017: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/28279770/transoral-decompression-and-anterior-stabilization-of-atlantoaxial-joint-in-patients-with-basilar-impression-and-chiari-malformation-type-i-a-technical-report-2-clinical-cases
#12
Alexey Nikolaevich Shkarubo, Alexander Alekseevich Kuleshov, Ilia Valerievich Chernov, Marchel Stepanovich Vetrile
OBJECT: presentation of clinical cases involving successful anterior stabilization of the C1-C2 segment in patients with invaginated C2 odontoid process and Chiari malformation type I. STUDY DESIGN: clinical case description. RESULTS: two patients with C2 odontoid processes invagination and Chiari malformation type I were surgically treated using the transoral approach. In both cases, anterior decompression of the upper cervical region was performed, followed by anterior stabilization of the C1-C2 segment...
March 6, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28259858/posterior-fossa-decompression-in-chiari-i-improves-denervation-of-the-paraspinal-muscles
#13
Shifu Sha, Yang Li, Yong Qiu, Zhen Liu, Xu Sun, Weiguo Zhu, Zhenhua Feng, Tao Wu, Jian Jiang, Zezhang Zhu
OBJECTIVE: To investigate whether posterior fossa decompression (PFD) could improve denervation of the paraspinal muscles in patients with Chiari I malformation (CMI). BACKGROUND: Paraspinal muscle denervation is one of the essential elements in the pathophysiology of CMI/syringomyelia-related scoliosis. Although PFD has been widely used for managing CMI, whether denervation of the paraspinal muscles may benefit from this neurosurgical procedure remains ambiguous...
March 4, 2017: Journal of Neurology, Neurosurgery, and Psychiatry
https://www.readbyqxmd.com/read/28259264/mri-screening-in-operative-scheuermann-kyphosis-is-it-necessary
#14
Baron S Lonner, Courtney S Toombs, Michael Mechlin, Gina Ciavarra, Suken A Shah, Amer F Samdani, Paul Sponseller, Harry L Shufflebarger, Randal R Betz, Burt Yaszay, Peter O Newton
STUDY DESIGN: Patients with preoperative spine magnetic resonance imaging (MRI) studies from a prospective multicenter study of operative adolescent Scheuermann kyphosis (SK). OBJECTIVES: To investigate the usefulness of MRI screening in operative planning for SK surgeries. SUMMARY OF BACKGROUND DATA: Neural axis abnormalities in operative SK have not been previously studied with MRI screening, despite its use. METHODS: One orthopedic surgeon and two radiologists evaluated all images retrospectively...
March 2017: Spine Deformity
https://www.readbyqxmd.com/read/28250628/is-chiari-a-formation-or-a-malformation
#15
EDITORIAL
Atul Goel
No abstract text is available yet for this article.
January 2017: Journal of Craniovertebral Junction and Spine
https://www.readbyqxmd.com/read/28223250/dorsal-cervical-spinal-cord-herniation-precipitated-by-kyphosis-deformity-correction-for-spinal-cord-tethering
#16
Robert S Heller, Steven W Hwang, Ron I Riesenburger
INTRODUCTION: Cervical spinal cord herniation is a rare clinical entity. Reported after previous intradural surgery or surgery complicated by durotomy, patients return several months to years later with symptoms of worsening myelopathy. Herein is presented a case of a 51-year-old female patient with spinal cord herniation in the cervical spine after kyphosis deformity correction. CASE DESCRIPTION: A 51-year old female patient presented to the neurosurgery clinic with worsening cervical myelopathy due to cervical spinal cord tethering and adhesions from previous intradural surgery for Chiari malformation...
February 20, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28220607/neurological-and-spinal-manifestations-of-the-ehlers-danlos-syndromes
#17
Fraser C Henderson, Claudiu Austin, Edward Benzel, Paolo Bolognese, Richard Ellenbogen, Clair A Francomano, Candace Ireton, Petra Klinge, Myles Koby, Donlin Long, Sunil Patel, Eric L Singman, Nicol C Voermans
The Ehlers-Danlos syndromes (EDS) are a heterogeneous group of heritable connective tissue disorders characterized by joint hypermobility, skin extensibility, and tissue fragility. This communication briefly reports upon the neurological manifestations that arise including the weakness of the ligaments of the craniocervical junction and spine, early disc degeneration, and the weakness of the epineurium and perineurium surrounding peripheral nerves. Entrapment, deformation, and biophysical deformative stresses exerted upon the nervous system may alter gene expression, neuronal function and phenotypic expression...
February 21, 2017: American Journal of Medical Genetics. Part C, Seminars in Medical Genetics
https://www.readbyqxmd.com/read/28217391/chiari-i-malformation-and-delivery
#18
Paolo A Bolognese, Roger W Kula, Stephen T Onesti
No abstract text is available yet for this article.
2017: Surgical Neurology International
https://www.readbyqxmd.com/read/28217389/management-of-parturients-in-active-labor-with-arnold-chiari-malformation-tonsillar-herniation-and-syringomyelia
#19
Ramsis F Ghaly, Tatiana Tverdohleb, Kenneth D Candido, Nebojsa Nick Knezevic
BACKGROUND: Arnold-Chiari malformation Type 1 (ACM-1) in parturients is a topic of ongoing discussion between obstetricians and anesthesiologists. The primary unanswered question remains; How should the anesthesia provider proceed with labor analgesia and anesthesia for cesarean section when confronted with an advanced, asymptomatic, or minimally symptomatic case of ACM-1 during labor? CASE DESCRIPTION: A 24-year-old, ASA II, G1P0 full-term parturient presented to Labor and Delivery for vaginal delivery...
2017: Surgical Neurology International
https://www.readbyqxmd.com/read/28196729/delayed-expansion-of-an-intracranial-cyst-induced-by-ventriculoperitoneal-shunt-in-a-patient-with-chiari-malformation-type-2
#20
Yoshinori Maki, Tsuyoshi Ohta, Hirokazu Onishi, Naoki Fukui, Masanori Morimoto
A male neonate was referred to our hospital for the treatment of myelomeningocele and hydrocephalus related to Chiari malformation type 2. After the placement of ventriculoperitoneal (VP) shunt for hydrocephalus, an intracranial cyst, which was asymptomatic at first, expanded and caused clinical symptoms due to increased intracranial pressure. The expansion of the cyst was confirmed dominantly in the right lateral ventricle where the VP shunt was inserted. Intraoperative findings through a neuroendoscope suggested that the expanded cyst was an isolated lesion...
February 11, 2017: Brain & Development
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