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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
#1
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/28264274/a-new-species-of-i-phyllodytes-i-wagler-1830-anura-hylidae-from-the-atlantic-forest-of-southern-bahia-brazil
#2
Euvaldo Marciano-Jr, Amanda Santiago F Lantyer-Silva, Mirco Solé
We describe a new species of Phyllodytes from Ilhéus (15º04'S, 39º03'W; 95 m above sea level), south of state of Bahia, in the northeastern Atlantic Forest of Brazil. Phyllodytes megatympanum sp. nov. is diagnosable by the following combination of characters: (1) dorsum of body, arms, and legs uniformly light brown; (2) groin yellow; (3) snout pointed in dorsal view, protruding in profile; (4) tympanum large with a round distinct tympanic annulus; (5) adult males with two anterior large odontoids followed by a series of smaller odontoids on each side of the mandible; (6) well-developed tubercle near tibio-tarsal joint; (7) advertisement call composed of a series of 12 to 19 unpulsed notes, with harmonic structure and (8) mean dominant frequency of 3...
March 2, 2017: Zootaxa
https://www.readbyqxmd.com/read/28256741/osteoporosis-is-the-most-important-risk-factor-for-odontoid-fractures-in-the-elderly
#3
Johannes Kaesmacher, Claudia Schweizer, Alexander Valentinitsch, Thomas Baum, Anna Rienmüller, Bernhard Meyer, Jan S Kirschke, Yu-Mi Ryang
BACKGROUND: Traumatic odontoid fractures (TOFs) have been described as the most common injury affecting the C-spine in the elderly. Previous studies have identified degenerative changes and bone loss as important predisposing factors. However, their interaction and respective age-adjusted impact needs further clarification. METHODS: Retrospective analysis of 5303 patients (≥60 years) admitted to a level-I trauma center between 01/2008-01/2016 who underwent CT imaging of the C-spine...
March 3, 2017: Journal of Bone and Mineral Research: the Official Journal of the American Society for Bone and Mineral Research
https://www.readbyqxmd.com/read/28255505/odontoid-fracture-in-a-patient-with-diffuse-idiopathic-skeletal-hyperostosis
#4
Adan Omar, Addisu Mesfin
Nonoperative management of fractures in the setting of diffuse idiopathic skeletal hyperostosis (DISH) or ankylosing spondylitis is often unsuccessful. The subaxial spine is a common site of hyperextension fractures in the setting of DISH. Fractures of the upper cervical spine are uncommon in DISH. We report, to our knowledge, the first case describing successful nonoperative management of a type 2 odontoid fracture in a patient with DISH. We discuss the patient's initial presentation, physical examination, imaging findings, and management...
March 2017: Geriatric Orthopaedic Surgery & Rehabilitation
https://www.readbyqxmd.com/read/28254542/role-of-atlantoaxial-and-subaxial-spinal-instability-in-pathogenesis-of-spinal-degeneration-related-cervical-kyphosis
#5
Atul Goel, Amol Kaswa, Abhidha Shah
AIM: The role of subaxial and atlantoaxial instability in the pathogenesis of 'degeneration' related cervical kyphosis is evaluated. MATERIAL AND METHODS: During the period 2013 to 2016, the authors treated 21 patients having cervical kyphosis that was related to degenerative spinal disease. The patients presented with symptoms related to cervical myelopathy. Kyphosis was diagnosed on the basis of described radiological parameters. The patients were divided into three groups...
February 22, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28253944/-management-of-odontoid-fractures-with-compression-screw-and-anterior-transarticular-screw-fixation-in-elderly-patients
#6
J Kočiš, M Kelbl, R Veselý, T Kočiš
PURPOSE OF THE STUDY In the management of dens axis fractures in patients older than 65 years of age the posterior approach is preferred due to osteoporosis and the risk of a failure of anterior osteosynthesis. The posterior approach, however, is associated with a higher incidence of complications. A combination of anterior transarticular fixation of C1/2 (ATS) with compression osteosynthesis of dens axis significantly increases the stability of osteosynthesis. MATERIAL AND METHODS In the period from 2009 to 2015 our hospital admitted 13 patients older than 65 years of age with a diagnosed type III dens axis fracture based on AO classification...
2017: Acta Chirurgiae Orthopaedicae et Traumatologiae Cechoslovaca
https://www.readbyqxmd.com/read/28250639/patient-reported-outcome-following-nonsurgical-management-of-type-ii-odontoid-process-fractures-in-adults
#7
Maged D Fam, Hussein A Zeineddine, Rafiq Muhammed Nassir, Pragnesh Bhatt, Mahmoud H Kamel
BACKGROUND: Transverse (type II) odontoid process fracture is among the most commonly encountered cervical spine fractures. Nonsurgical management through external immobilization is occasionally preferred to surgical management but is criticized for its higher rates of failure and lower patient satisfaction. Our aim is to analyze patient-reported outcomes in patients who underwent nonsurgical treatment for type II odontoid fractures. METHODS: We identified patients >18-year-old who underwent external immobilization as a treatment for isolated type II odontoid fracture between 2007 and 2012...
January 2017: Journal of Craniovertebral Junction and Spine
https://www.readbyqxmd.com/read/28250638/odontoidectomy-through-posterior-midline-approach-followed-by-same-sitting-occipitocervical-fixation-a-cadaveric-study
#8
Ehab Mohamed Eissa, Mohamed Mohi Eldin
OBJECT: Atlantoaxial instability with irreducible odontoid process is one of the challenges in spine surgery. These lesions are commonly treated through anterior transoral approach which is followed by posterior atlantoaxial fusion. However, there are still many limitations, especially cerebrospinal fluid fistula with subsequent life-threatening infection, difficulty in cases with limited opening of mouth due to temporomandibular arthritis or anomalies of naso-oropharynx. Türe et al...
January 2017: Journal of Craniovertebral Junction and Spine
https://www.readbyqxmd.com/read/28250633/top-50-most-cited-articles-on-craniovertebral-junction-surgery
#9
Nima Alan, Jonathan Andrew Cohen, James Zhou, Matthew Pease, Adam S Kanter, David O Okonkwo, David Kojo Hamilton
BACKGROUND: Craniovertebral junction is a complex anatomical location posing unique challenges to the surgical management of its pathologies. We aimed to identify the fifty most-cited articles that are dedicated to this field. METHODS: A keyword search using the Thomson Reuters Web of Knowledge was conducted to identify articles relevant to the field of craniovertebral junction surgery. The articles were reviewed based on title, abstract, and methods, if necessary, and then ranked based on the total number of citations to identify the fifty most-cited articles...
January 2017: Journal of Craniovertebral Junction and Spine
https://www.readbyqxmd.com/read/28243364/biomechanical-assessment-of-stabilization-of-simulated-type-ii-odontoid-fracture-with-case-study
#10
Roy T Daniel, Mir M Hussain, Noelle Klocke, Soumya S Yandamuri, Lukas Bobinski, John M Duff, Brandon S Bucklen
STUDY DESIGN: Researchers created a proper type II dens fracture (DF) and quantified a novel current posterior fixation technique with spacers at C1-C2. A clinical case study supplements this biomechanical analysis. PURPOSE: Researchers explored their hypothesis that spacers combined with posterior instrumentation (PI) reduce range of motion significantly, possibly leading to better fusion outcomes. OVERVIEW OF LITERATURE: Literature shows that the atlantoaxial joint is unique in allowing segmental rotary motion, enabling head turning...
February 2017: Asian Spine Journal
https://www.readbyqxmd.com/read/28229224/factors-affecting-survival-of-patients-in-the-acute-phase-of-upper-cervical-spine-injuries
#11
Tomonori Morita, Tsuneo Takebayashi, Hideto Irifune, Hirofumi Ohnishi, Suguru Hirayama, Toshihiko Yamashita
INTRODUCTION: In recent years, on the one hand, the mortality rates of upper cervical spine injuries, such as odontoid fractures, were suggested to be not so high, but on the other hand reported to be significantly high. Furthermore, it has not been well documented the relationship between survival rates and various clinical features in those patients during the acute phase of injury because of few reports. This study aimed to evaluate survival rates and acute-phase clinical features of upper cervical spine injuries...
February 22, 2017: Archives of Orthopaedic and Trauma Surgery
https://www.readbyqxmd.com/read/28225467/comparison-of-anesthetic-management-and-outcomes-in-patients-having-either-transnasal-or-transoral-endoscopic-odontoid-process-surgery
#12
Matthew A Sexton, Arnoley S Abcejo, Jeffrey J Pasternak
BACKGROUND: Endoscopic neurosurgical procedures involving the upper cervical vertebrae are challenging due to a narrow operating field and close proximity to vital anatomical structures. Historically, transoropharyngeal (transoral) endoscopy has been the preferred approach. More recently, however, an endoscopic transnasal approach was developed as an alternative method in hopes to reduce postoperative dysphagia, a common complication following transoral neurosurgery. METHODS: Twenty-two endoscopic neurosurgical cases involving the odontoid or C1 vertebra were reviewed between January 1, 2005 and December 31, 2015 (17 and 5 through transoral and transnasal approaches, respectively)...
February 20, 2017: Journal of Neurosurgical Anesthesiology
https://www.readbyqxmd.com/read/28217386/true-oblique-axis-fracture-associated-with-congenital-anomalies-of-the-upper-cervical-spine-case-report-of-an-unusual-fracture-pattern
#13
Luis A Robles
BACKGROUND: Acute traumatic axis fractures are common cervical spine injuries often caused by road accidents or falls. They are usually classified into three different types, namely, odontoid fractures, Hangman's fractures, and miscellaneous fractures. Congenital malformations of the craniovertebral junction (CVJ), although typically asymptomatic, may result in neural compression or instability, especially following trauma. Here, the authors present an unusual oblique axis fracture occurring in conjunction with several malformations of the upper cervical spine...
2017: Surgical Neurology International
https://www.readbyqxmd.com/read/28194180/passage-of-an-anterior-odontoid-screw-through-gastrointestinal-tract
#14
L Leitner, C I Brückmann, M M Gilg, G Bratschitsch, P Sadoghi, A Leithner, R Radl
Purpose. Anterior screw fixation has become a popular surgical treatment method for instable odontoid fractures. Screw loosening and migration are a rare, severe complication following anterior odontoid fixation, which can lead to esophagus perforation and requires revision operation. Methods. We report a case of screw loosening and migration after anterior odontoid fixation, which perforated the esophagus and was excreted without complications in a 78-year-old male patient. Results. A ventral dislocated anterior screw perforated through the esophagus after eight years after implantation and was excreted through the gastrointestinal (GI) tract...
2017: Case Reports in Medicine
https://www.readbyqxmd.com/read/28186477/bilateral-sagittal-split-mandibular-osteotomies-for-enhanced-exposure-of-the-anterior-cervical-spine-in-children-technical-note
#15
Michael Karsy, Neal Moores, Faizi Siddiqi, Douglas L Brockmeyer, Robert J Bollo
The bilateral sagittal split mandibular osteotomy (BSSMO), a common maxillofacial technique for expanding the oropharynx during treatment of micrognathia, is a rarely employed but useful adjunct to improve surgical access to the ventral cervical spine in children. Specifically, it provides enhanced exposure of the craniocervical junction in the context of midface hypoplasia, and of the subaxial cervical spine in children with severe kyphosis. The authors describe their technique for BSSMO and evaluate long-term outcomes in patients...
February 10, 2017: Journal of Neurosurgery. Pediatrics
https://www.readbyqxmd.com/read/28182084/c2-fracture-subtypes-incidence-and-treatment-allocation-change-with-age-a-retrospective-cohort-study-of-233-consecutive-cases
#16
Anna-Lena Robinson, Anders Möller, Yohan Robinson, Claes Olerud
The currently available data on the distribution of C2 fracture subtypes is sparse. This study was designed to identify the proportions of the second cervical vertebra (C2) fracture subtypes and to present age and gender specific incidences of subgroups. A dataset of all patients treated between 2002 and 2014 for C2 fractures was extracted from the regional hospital information system. C2 fractures were classified into odontoid fractures types 1, 2, and 3, Hangman's fractures types 1, 2, and 3, and atypical C2 fractures...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28176269/a-new-superficial-landmark-for-the-odontoid-process-a-cadaveric-study
#17
Christian Fisahn, Michael J Montalbano, Joe Iwanaga, Marc Moisi, Marios Loukas, Jens R Chapman, Rod J Oskouian, R Shane Tubbs
When image guidance is not available or when there is a need to confirm the findings of such technology, superficial landmarks can still play a role in providing surgeons with estimations of the position of deeper anatomical structures. To our knowledge, surface landmarks for the position of the odontoid process have not been investigated. We have therefore performed an anatomical study to investigate such a landmark. One-centimeter metallic rods were placed on the philtrum of the upper lip of 20 cadaveric head specimens...
February 7, 2017: Anatomical Science International
https://www.readbyqxmd.com/read/28175376/odontoid-fractures-and-the-silver-tsunami-evidence-and-practice-in-the-very-elderly
#18
Christopher S Graffeo, Avital Perry, Ross C Puffer, Lucas P Carlstrom, Wendy Chang, Grant W Mallory, Michelle J Clarke
No abstract text is available yet for this article.
August 1, 2016: Neurosurgery
https://www.readbyqxmd.com/read/28163511/use-of-frameless-stereotactic-neuronavigation-and-o-arm-for-transoral-transpalatal-odontoidectomy-to-treat-a-very-high-basilar-invagination
#19
Skanda Moorthy, Amol Raheja, Deepak Agrawal
Frameless stereotactic neuronavigation system has been in wide use since many years for precise localization of cranial tumors and navigation for spinal instrumentation. We present its usage in the localization of odontoid process in a very high basilar invagination for a transoral transpalatal resection of the same. We discuss the technical aspects of assembly of neuronavigation system, O-arm and Mayfield head frame on Allen spine system to achieve precise and accurate localization of high riding odontoid process through an extremely narrow operative corridor...
December 2016: Journal of Neurosciences in Rural Practice
https://www.readbyqxmd.com/read/28151846/osteomyelitis-of-the-odontoid-process-in-children-two-cases-and-review-of-the-literature
#20
Asael Lubotzky, Ruth Cytter Kuint, Eliyahu Raccah, Orli Megged
OBJECTIVE: To report clinical, laboratory, and radiologic manifestations in two infants with osteomyelitis of the odontoid process (dens). BACKGROUND: Vertebral osteomyelitis is uncommon, and osteomyelitis of the dens has rarely been reported in the pediatric population. METHODS: The medical records of two infants diagnosed with dens osteomyelitis were reviewed. RESULTS: Both infants had fever which resolved spontaneously before admission...
January 31, 2017: Pediatric Infectious Disease Journal
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