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chiari malformation

Sharad Rajpal, Colson Tomberlin, Andrew Bauer, Robert C Forsythe, Sigita Burneikiene
BACKGROUND: The variety of diagnostic characteristics associated with neurocysticercosis have been well studied, however, its potential to be implicated in other differential diagnosis has not been well demonstrated. CASE DESCRIPTION: We report the case of a 55-year-old Hispanic man who underwent a Chiari decompression surgery, which was complicated with hydrocephalus. Despite a ventriculoperitoneal (VP) shunt placement, he continued to have headaches and was soon found to have several skull base subarachnoid lesions, which were later diagnosed as the sequelae of an active neurocysticercosis infection...
March 12, 2018: World Neurosurgery
Rajani Singh, Rajnish Arora, Raj Kumar
Chiari malformations (CMs) are variant structural setup of cerebellum and brain stem at the craniovertebral junction. Normally the cerebellum and parts of the brain stem lie above the foramen magnum. When the part of the cerebellum and/or brainstem protrudes into the upper spinal canal through foramen magnum, it is defined as CM. Chiari malformations may develop when part of the skull is smaller than normal or misshapen, due to which the cerebellum herniates into spinal canal through foramen magnum. This compresses the cerebellum and brainstem affecting functions controlled by these parts and blocks the flow of cerebrospinal fluid that surrounds and cushions the brain and spinal cord...
March 14, 2018: Journal of Craniofacial Surgery
Ibrahim Hussain, Theodore H Schwartz, Jeffrey P Greenfield
Basilar invagination is defined as abnormal upward and/or posterior displacement of the odontoid leading to ventral compression of the cervicomedullary junction. This condition leads to lower cranial neuropathies, sensorimotor deficits, and myelopathy. These symptoms can persist even after posterior decompression, which is an indication for ventral decompression. Transoral approaches to the upper cervical spine carry significant morbidity, limiting their utility. The endonasal approach to the upper cervical spine presents an alternative for patients with amenable anatomy...
March 13, 2018: Clinical Spine Surgery
Ash Singhal, Alexander Cheong, Paul Steinbok
INTRODUCTION: In 2003, pediatric neurosurgeons were surveyed under the auspices of the education committee of the International Society for Pediatric Neurosurgery (ISPN) to determine prevailing opinions regarding the management of Chiari I malformation (C1M) with and without associated syringomyelia. In the ensuing years, there has been further information from multiple C1M studies, with regards to indications, success rates of different surgical interventions, and complications. The purpose of this study was to re-evaluate current opinions and practices in pediatric C1M...
March 12, 2018: Child's Nervous System: ChNS: Official Journal of the International Society for Pediatric Neurosurgery
Srdjan Cirovic, Robert Lloyd, Jelena Jovanovik, Holger A Volk, Clare Rusbridge
BACKGROUND: Syringomyelia is a pathological condition in which fluid-filled cavities (syringes) form and expand in the spinal cord. Syringomyelia is often linked with obstruction of the craniocervical junction and a Chiari malformation, which is similar in both humans and animals. Some brachycephalic toy breed dogs such as Cavalier King Charles Spaniels (CKCS) are particularly predisposed. The exact mechanism of the formation of syringomyelia is undetermined and consequently with the lack of clinical explanation, engineers and mathematicians have resorted to computer models to identify possible physical mechanisms that can lead to syringes...
March 9, 2018: BMC Veterinary Research
Hasan Önal, Atilla Ersen, Hakan Gemici, Erdal Adal, Serhat Güler, Serdar Sander, Sait Albayram
Spontaneous intracranial hypotension (SIH) is a rare and potentially serious condition in childhood. Cerebrospinal fluid (CSF) volume depletion is thought to be the main causative feature for intracranial hypotension, results from spontaneous CSF leak, often at the spine level. SIH is increasingly diagnosed in clinical practice, although it manifests into a variegated symptomatology. Indeed, downward displacement of the brain, sometimes mimicking a Chiari I malformation, but concomitant presentation of these syndromes has rarely been reported...
February 27, 2018: Journal of Clinical Research in Pediatric Endocrinology
Ali Kandeger, Hasan Ali Guler, Umran Egilmez, Ozkan Guler
No abstract text is available yet for this article.
October 2017: Indian Journal of Psychiatry
Vinod Kumar Tewari, Rituj Somvanshi, Ravindra Bihari Trivedi, Mazhar Hussain, H K Das Gupta, R S Dubey
Tethering of the spinal cord in the lumbosacral region with myelomeningocele is a well-known phenomenon. Only sporadic cases of tethering along the rest of the neuraxis, including the hindbrain, cervical, and thoracic spinal cord have been documented, always along with some associated congenital malformations (hydrocephalus, Chiari malformation, myelomeningocele, meningocele, hamartomatous stalk, spina bifida occulta, intramedullary lipoma, intradural fibrous adhesions, the fusion of the sixth and seventh cervical vertebrae, split cord malformation, or low-lying cord)...
January 2018: Asian Journal of Neurosurgery
Zhi Chai, Xiaoming Xue, Huijie Fan, Lin Sun, Hongyu Cai, Yanmiao Ma, Cungen Ma, Ran Zhou
This study aimed to quantitatively assess and compare the effect and safety of posterior fossa decompression with duraplasty (PFDD) and posterior fossa decompression (PFD) in treating patients with Chiari malformation type I (CM1). PubMed, Embase, and Cochrane Library were searched through May 2017. Fourteen cohort studies, involving a total of 3666 patients with CM1, were included. Studies were pooled, and the relative risk (RR) and its corresponding 95% confidence interval (CI) were calculated. The decrease in syringomyelia was better for patients in the PFDD group than for patients in the PFD group (RR=1...
February 23, 2018: World Neurosurgery
Elena Pellicer, Babette S Siebold, Craig B Birgfeld, Emily R Gallagher
BACKGROUND: The recommended treatment for craniosynostosis, is cranial vault expansion to prevent increased intracranial pressure and optimize developmental outcomes. Some patients complain about postoperative headaches and occasionally require revision to treat increased intracranial pressure. This study examines whether specific factors are associated with an increased risk of postoperative headaches or intracranial hypertension. METHODS: This retrospective cohort included patients with craniosynostosis from 1995 and 2010...
March 2018: Plastic and Reconstructive Surgery
Michael Faloon, Nikhil Sahai, Todd P Pierce, Conor J Dunn, Kumar Sinha, Ki Soo Hwang, Arash Emami
BACKGROUND: Several studies have sought to address the role of routine preoperative MRI in patients with adolescent idiopathic scoliosis (AIS) undergoing deformity correction. Despite similar results regarding the prevalence of neuraxial anomalies detected on MRI, published conclusions conflict and give opposing recommendations. Lack of consensus has led to important variations in use of MRI before spinal surgery for patients with AIS. QUESTIONS/PURPOSES: This systematic review and meta-analysis of studies about patients with AIS evaluated (1) the overall proportion of neuraxial abnormalities; (2) the patient factors and curve characteristics that may be associated with abnormalities; and (3) the proportion of patients who underwent neurosurgical intervention before scoliosis surgery and the kinds of neuraxial lesions that were identified...
February 21, 2018: Clinical Orthopaedics and related Research
Sofia Lopes, Julia Vide, Elisabete Moreira, Filomena Azevedo
Cowden syndrome is a rare genodermatosis of autosomal dominant inheritance characterized by multiple hamartomas in several organs and an increased risk of malignancies. We present the case of a 53-year-old man with a history of benign and malignant thyroid disease, intestinal polyposis, and Chiari malformation. He had several trichilemmomas, papillomatosis of the oral cavity, macular pigmentation of the glans penis, among other clinical features suggestive of Cowden syndrome. Given the suspicion, genetic study was conducted and PTEN mutation was identified...
August 15, 2017: Dermatology Online Journal
Surget V Beatrous, Ryan R Riahi, Stratton B Grisoli, Philip R Cohen
Dermatofibromas are benign, fibrohistiocytic, dermal tumors. Solitary dermatofibromas may be incidental findings, whereas multiple dermatofibromas may be associated with systemic conditions or previous therapies. Two women and one man with multiple dermatofibromas and an associated systemic condition, immunosuppression, or both, are described. Nine dermatofibromas developed in a woman with hypothyroidism, optic neuritis, and Arnold Chiari I malformation. Five dermatofibromas developed in a woman with breast cancer who had received several systemic antineoplastic therapies...
September 22, 2017: Dermatology Online Journal
Jeffrey M Rogers, Greg Savage, Marcus A Stoodley
Displacement of the cerebellar tonsils in Chiari type I malformation (CMI) can affect functions controlled by the cerebellum and brainstem. While playing an integral role in the control of movement, the cerebellum also has widespread cortical connections, influencing a range of cognitive process. A systematic literature review was conducted to examine the relationship between cognition and CMI, assessing evidence for general or domain-specific cognitive change. The search protocol examined the AMED, CINAHL, Cochrane Library, EMBASE, MEDLINE, PsycINFO, and Scopus databases...
February 21, 2018: Neuropsychology Review
Andrea E Copeland, Caitlin E Hoffman, Vassilios Tsitouras, Dhruve S Jeevan, Emily S Ho, James M Drake, Christopher R Forrest
Background: The pattern of cranial venous drainage in syndromic craniosynostosis is unpredictable and not adequately understood. Collateral channels substitute for stenotic venous sinuses and pose potential risk for surgical intervention. The purpose of this study was to analyze the patterns of venous drainage in patients with syndromic craniosynostosis and their influence on operative planning and morbidity. Methods: A retrospective study of patients with syndromic craniosynostosis from 2000 to 2013 was performed...
January 2018: Plastic and Reconstructive Surgery. Global Open
I Swarup, P Derman, E Sheha, J Nguyen, J Blanco, R Widmann
Purpose: Previous studies have suggested an association between increased thoracic kyphosis and neural axis abnormalities in patients with adolescent idiopathic scoliosis (AIS). However, the basis for this finding is unclear, and this association has been mainly noted in retrospective studies on a non-consecutive series of patients. The purpose of this study was to assess the relationship between thoracic kyphosis and neural axis abnormalities in patients with AIS. Methods: We studied a consecutive series of AIS patients treated with spinal fusion...
February 1, 2018: Journal of Children's Orthopaedics
Johan L Heemskerk, Moyo C Kruyt, Dino Colo, René M Castelein, Diederik H R Kempen
BACKGROUND: There is ongoing controversy about the routine use of magnetic resonance imaging (MRI) preoperatively in patients with presumed idiopathic scoliosis (IS). Routine MRI can help identify possible causes for the deformity and detect anomalies which could complicate deformity surgery. However, routine MRI increases health care costs significantly and may reveal mild variations from normal without clinical relevance, that can still lead to anxiety and influence decision making...
February 14, 2018: Spine Journal: Official Journal of the North American Spine Society
Marcelo Ferreira Sabba, Beatriz Souza Renor, Enrico Ghizoni, Helder Tedeschi, Andrei Fernandes Joaquim
Chiari malformation (CM) is the most common and prevalent symptomatic congenital craniocervical malformation. Radiological diagnosis is established when the cerebellar tonsils are located 5 mm or more below the level of the foramen magnum on magnetic resonance imaging (MRI). Surgical treatment is indicated whenever there is symptomatic tonsillar herniation or syringomyelia/hydrocephalus. The main surgical treatment for CM without craniocervical instability (such as atlantoaxial luxation) is posterior fossa decompression, with or without duraplasty...
November 2017: Revista da Associação Médica Brasileira
Michael Garcia, Christopher Daugherty, Bertha Ben Khallouq, Todd Maugans
OBJECTIVE The Internet is used frequently by patients and family members to acquire information about pediatric neurosurgical conditions. The sources, nature, accuracy, and usefulness of this information have not been examined recently. The authors analyzed the results from searches of 10 common pediatric neurosurgical terms using a novel scoring test to assess the value of the educational information obtained. METHODS Google and Bing searches were performed for 10 common pediatric neurosurgical topics (concussion, craniosynostosis, hydrocephalus, pediatric brain tumor, pediatric Chiari malformation, pediatric epilepsy surgery, pediatric neurosurgery, plagiocephaly, spina bifida, and tethered spinal cord)...
February 16, 2018: Journal of Neurosurgery. Pediatrics
Ying Zhang, Jingming Xie, Yingsong Wang, Ni Bi, Tao Li, Jie Zhang, Zhi Zhao, Hua Ou, Siyuan Liu
PURPOSE: Documents indicated that the average prevalence of intraspinal neural axis abnormalities (INAAs) in presumed idiopathic scoliosis (PIS) patients was about 17.7%. However, paucity study focuses on the incidence of INAAs in severe spinal deformity (SSDs). In this study, we investigate the incidence of intraspinal neural axis abnormalities (IINAAs) and the clinical relevance in SSD at a single center. METHODS: All the patients with SSDs admitted for spinal surgery were evaluated from 2003 to 2014...
February 14, 2018: European Spine Journal
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