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superior canal dehiscence

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https://www.readbyqxmd.com/read/28628917/anatomical-characteristics-of-facial-nerve-and-cochlea-interaction
#1
Nadine Schart-Morén, Sune Larsson, Helge Rask-Andersen, Hao Li
OBJECTIVE: The aim was to study the relationship between the labyrinthine portion (LP) of the facial canal and the cochlea in human inner ear molds and temporal bones using micro-CT and 3D rendering. A reduced cochlea-facial distance may spread electric currents from the cochlear implant to the LP and cause facial nerve stimulation. Influencing factors may be the topographic anatomy and otic capsule properties. METHODS: An archival collection of human temporal bones underwent micro-CT and 3D reconstruction...
June 20, 2017: Audiology & Neuro-otology
https://www.readbyqxmd.com/read/28627985/diagnostic-performance-of-reformatted-isotropic-thin-section-helical-ct-images-in-the-detection-of-superior-semicircular-canal-dehiscence
#2
Gianvincenzo Sparacia, Alberto Iaia
Purpose The purpose of this article is to assess the diagnostic performance of computed tomography (CT) reformatted images for detection of superior semicircular canal (SSC) dehiscence. Material and methods Forty-two patients, with sound- and/or pressure-induced vestibular symptoms, and 42 control participants underwent helical CT examination with a highly collimated beam (0.5 mm). Reformatted images of the vestibular labyrinth were obtained in the standard axial and coronal planes (group A images), and in a plane parallel and perpendicular to the SSC (group B images)...
June 2017: Neuroradiology Journal
https://www.readbyqxmd.com/read/28622893/outcomes-of-middle-fossa-craniotomy-for-the-repair-of-superior-semicircular-canal-dehiscence
#3
Nolan Ung, Lawrance K Chung, Carlito Lagman, Nikhilesh S Bhatt, Natalie E Barnette, Vera Ong, Quinton Gopen, Isaac Yang
Superior semicircular canal dehiscence (SSCD) is a rare defect of the arcuate eminence that causes an abnormal connection between the superior semicircular canal and middle cranial fossa. Patients often present with a variety of auditory and vestibular symptoms. Trigger avoidance is the initial strategy, but surgery may be necessary in debilitating cases. We retrospectively reviewed SSCD patients undergoing repair via a middle fossa craniotomy between March 2011 and September 2015. Forty-nine patients undergoing 58 surgeries were identified...
June 13, 2017: Journal of Clinical Neuroscience: Official Journal of the Neurosurgical Society of Australasia
https://www.readbyqxmd.com/read/28607824/electrocochleography-summating-potential-seen-on-auditory-brainstem-response-in-a-case-of-superior-semicircular-canal-dehiscence
#4
Bryan K Ward, Angela Wenzel, Eva K Ritzl, John P Carey
BACKGROUND: Superior canal dehiscence syndrome (SCDS) is a condition in which an abnormal communication between the superior semicircular canal and the middle cranial fossa causes patients to hear internal noises transmitted loudly to their affected ear as well as to experience vertigo with pressure changes or loud sounds. Patients with SCDS can have an elevated ratio of summating potential (SP) to action potential (AP) as measured by electrocochleography (ECochG). Changes in this ratio have been observed during surgical intervention to correct this abnormal communication...
2017: Surgical Neurology International
https://www.readbyqxmd.com/read/28548616/pediatric-superior-semicircular-canal-dehiscence-illustrative-case-and-systematic-review
#5
Carlito Lagman, Vera Ong, Lawrance K Chung, Lekaa Elhajjmoussa, Christina Fong, Anthony C Wang, Quinton Gopen, Isaac Yang
OBJECTIVE The purpose of this study is to present an illustrative case of pediatric superior semicircular canal dehiscence (SSCD) and to systematically review the current published literature in the pediatric population. METHODS An electronic search of the Scopus, Web of Science, PsycINFO, Cochrane, and Embase databases was performed by 2 independent authors through January 2017. Search term combinations included "pediatrics," "children," "canal," and "dehiscence." Inclusion criteria were as follows: English, full-text clinical studies, case reports, and case series describing pediatric patient(s) (younger than 18 years) with CT evidence of SSCD...
May 26, 2017: Journal of Neurosurgery. Pediatrics
https://www.readbyqxmd.com/read/28532527/how-i-do-it-underwater-endoscopic-ear-surgery-for-plugging-in-superior-canal-dehiscence-syndrome
#6
D Yamauchi, Y Hara, H Hidaka, T Kawase, Y Katori
BACKGROUND: Underwater endoscopic ear surgery does not require suction and so protects the inner ear from unexpected aeration that may damage its function in the treatment of labyrinthine fistula. A method of underwater endoscopic ear surgery is proposed for the treatment of superior canal dehiscence. METHODS: Underwater endoscopic ear surgery was performed for plugging of the superior semicircular canal through the transmastoid approach. Saline solution was infused into the mastoid cavity through an Endo-Scrub Lens Cleaning Sheath...
May 23, 2017: Journal of Laryngology and Otology
https://www.readbyqxmd.com/read/28521355/minimally-invasive-middle-fossa-keyhole-craniectomy-for-repair-of-superior-semicircular-canal-dehiscence
#7
Trieu Vanessa, Panayiotis E Pelargos, Marko Spasic, Lawrance K Chung, Brittany Voth, Nolan Ung, Quinton Gopen, Isaac Yang
BACKGROUND: Superior semicircular canal dehiscence (SSCD) presents with varying degrees of auditory and vestibular dysfunction. The condition is confirmed on high-resolution computed tomography (CT) imaging, and symptoms are often improved by surgical repair. Although a classic middle fossa craniotomy has been used with good results, recent advances in technique have allowed for modification of the traditional approach into a smaller skin incision and a minimally invasive middle fossa keyhole craniectomy roughly 1...
June 1, 2017: Operative Neurosurgery (Hagerstown, Md.)
https://www.readbyqxmd.com/read/28503164/superior-canal-dehiscence-syndrome-lessons-from-the-first-20-years
#8
REVIEW
Bryan K Ward, John P Carey, Lloyd B Minor
Superior semicircular canal dehiscence syndrome was first reported by Lloyd Minor and colleagues in 1998. Patients with a dehiscence in the bone overlying the superior semicircular canal experience symptoms of pressure or sound-induced vertigo, bone conduction hyperacusis, and pulsatile tinnitus. The initial series of patients were diagnosed based on common symptoms, a physical examination finding of eye movements in the plane of the superior semicircular canal when ear canal pressure or loud tones were applied to the ear, and high-resolution computed tomography imaging demonstrating a dehiscence in the bone over the superior semicircular canal...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/28502274/superior-petrosal-sinus-causing-superior-canal-dehiscence-syndrome
#9
S M D Schneiders, J W Rainsbury, E F Hensen, R M Irving
OBJECTIVE: To determine signs and symptoms for superior canal dehiscence syndrome caused by the superior petrosal sinus. METHODS: A review of the English-language literature on PubMed and Embase databases was conducted, in addition to a multi-centre case series report. RESULTS: The most common symptoms of 17 patients with superior petrosal sinus related superior canal dehiscence syndrome were: hearing loss (53 per cent), aural fullness (47 per cent), pulsatile tinnitus (41 per cent) and pressure-induced vertigo (41 per cent)...
July 2017: Journal of Laryngology and Otology
https://www.readbyqxmd.com/read/28484680/superior-semicircular-canal-dehiscence-in-a-patient-with-ehlers-danlos-syndrome-a-case-report
#10
Lawrance K Chung, Carlito Lagman, Daniel T Nagasawa, Quinton Gopen, Isaac Yang
Superior semicircular canal dehiscence (SSCD) is a bony defect in the middle cranial fossa floor that results in an abnormal connection between the inner ear and cranial vault. Although the etiology of SSCD remains unclear, an inappropriately thin or fragile temporal bone likely predisposes an individual towards developing SSCD. Ehlers-Danlos syndrome (EDS) constitutes a group of genetic connective tissue disorders caused by a defect in the production, processing, or structure of collagen, or its associated proteins...
April 6, 2017: Curēus
https://www.readbyqxmd.com/read/28418791/superior-semicircular-canal-dehiscence-symptoms-unmasked-by-ossicular-chain-reconstruction
#11
Omid Moshtaghi, Hossein Mahboubi, Hamid R Djalilian, Harrison W Lin
No abstract text is available yet for this article.
April 1, 2017: Otolaryngology—Head and Neck Surgery
https://www.readbyqxmd.com/read/28384775/superior-canal-dehiscence-syndrome-affecting-3-families
#12
Katherine D Heidenreich, Paul R Kileny, Sameer Ahmed, Hussam K El-Kashlan, Tori L Melendez, Gregory J Basura, Marci M Lesperance
Importance: Superior canal dehiscence syndrome (SCDS) is an increasingly recognized cause of hearing loss and vestibular symptoms, but the etiology of this condition remains unknown. Objective: To describe 7 cases of SCDS across 3 families. Design, Setting, and Participants: This retrospective case series included 7 patients from 3 different families treated at a neurotology clinic at a tertiary academic medical center from 2010 to 2014. Patients were referred by other otolaryngologists or were self-referred...
April 6, 2017: JAMA Otolaryngology—Head & Neck Surgery
https://www.readbyqxmd.com/read/28382131/superior-semicircular-canal-dehiscence-syndrome-diagnosis-and-surgical-management
#13
Marite Palma Diaz, Juan Carlos Cisneros Lesser, Alfredo Vega Alarcón
Introduction Superior semicircular canal dehiscence syndrome was described by Minor et al in 1998. It is a troublesome syndrome that results in vertigo and oscillopsia induced by loud sounds or changes in the pressure of the external auditory canal or middle ear. Patients may present with autophony, hyperacusis, pulsatile tinnitus and hearing loss. When symptoms are mild, they are usually managed conservatively, but surgical intervention may be needed for patients with debilitating symptoms. Objective The aim of this manuscript is to review the different surgical techniques used to repair the superior semicircular canal dehiscence...
April 2017: International Archives of Otorhinolaryngology
https://www.readbyqxmd.com/read/28375910/dizziness-in-the-outpatient-care-setting
#14
Terry D Fife
PURPOSE OF REVIEW: This article summarizes an approach to evaluating dizziness for the general neurologist and reviews common and important causes of dizziness and vertigo. RECENT FINDINGS: Improved methods of diagnosing patients with vertigo and dizziness have been evolving, including additional diagnostic criteria and characterization of some common conditions that cause dizziness (eg, vestibular migraine, benign paroxysmal positional vertigo, chronic subjective dizziness)...
April 2017: Continuum: Lifelong Learning in Neurology
https://www.readbyqxmd.com/read/28321386/computerized-assessment-of-superior-semicircular-canal-dehiscence-size-using-advanced-morphological-imaging-operators
#15
Joel S Beckett, Carlito Lagman, Lawrance K Chung, Timothy T Bui, Seung J Lee, Brittany L Voth, Bilwaj Gaonkar, Quinton Gopen, Isaac Yang
Superior semicircular canal dehiscence (SSCD) describes a pathological aperture at the level of the arcuate eminence. Techniques for quantifying defect size are described with most studies using two-dimensional lengths that underestimate the pathology. The objective of this study is to describe a novel method of measurement that combines manual segmentation of high-resolution computed tomography (HRCT) images of the temporal bone and a morphological skeletonization transform to calculate dehiscence volume. Images were imported into a freely available image segmentation tool: ITK-SNAP (version 3...
April 2017: Journal of Neurological Surgery. Part B, Skull Base
https://www.readbyqxmd.com/read/28168887/cervical-and-ocular-vemp-testing-in-diagnosing-superior-semicircular-canal-dehiscence
#16
Jacob B Hunter, Neil S Patel, Brendan P O'Connell, Matthew L Carlson, Neil T Shepard, Devin L McCaslin, George B Wanna
Objective To determine the sensitivity and specificity of ocular and cervical vestibular evoked myogenic potentials (VEMPs) in the diagnosis of superior semicircular canal dehiscence (SCD) and to describe the VEMP response characteristics that are most sensitive to SCD and compare the findings to previous reports. Study Design Case series with chart review. Setting Two tertiary neurotologic referral centers. Subjects and Methods Cervical and ocular VEMP peak-to-peak amplitudes and thresholds from 39 adult patients older than 18 years with surgically confirmed SCD were compared with 84 age-matched controls...
May 2017: Otolaryngology—Head and Neck Surgery
https://www.readbyqxmd.com/read/28116976/relationship-between-surgically-treated-superior-canal-dehiscence-syndrome-and-body-mass-index
#17
Taha A Jan, Yew Song Cheng, Lukas D Landegger, Brian M Lin, Priya Srikanth, Marlien E F Niesten, Daniel J Lee
Objective Examine the association between body mass index (BMI) and superior canal dehiscence (SCD) among patients who have undergone surgical repair for superior canal dehiscence. Study Design Retrospective comparison study. Setting Neurotology tertiary care center. Subjects and Methods Retrospective review of consecutive adult patients evaluated at our institution for SCD syndrome between November 2006 and August 2015. A control group who underwent imaging within the same period for reasons other than SCD was also included...
April 2017: Otolaryngology—Head and Neck Surgery
https://www.readbyqxmd.com/read/28081534/enhanced-auditory-sensitivity-to-body-vibrations-in-superior-canal-dehiscence-syndrome
#18
Krister Brantberg, Luca Verrecchia, Magnus Westin
A key feature of superior canal dehiscence (SCD) syndrome is supranormal hearing of body sounds. The aim of the present study was to quantify this phenomenon and to ascertain whether auditory sensitivity to body vibrations can distinguish SCD patients. Hearing thresholds in response to vibration at the vertex, at the spinous process of the 7th cervical vertebra, and at the medial malleolus were tested in 10 SCD patients and 10 controls. Both patients and controls had insert earphones in both ears. The insert in the test ear was blocked while masking was presented to the other ear...
2016: Audiology & Neuro-otology
https://www.readbyqxmd.com/read/28017492/superior-canal-dehiscence-with-tegmen-defect-revealed-by-otoscopy-video-clip-demonstration-of-pulsatile-tympanic-membrane
#19
Andrea Castellucci, Cristina Brandolini, Gianluca Piras, Ignacio Javier Fernandez, Davide Giordano, Carmine Pernice, Giovanni Carlo Modugno, Antonio Pirodda, Gian Gaetano Ferri
Superior canal dehiscence is a pathologic condition of the otic capsule acting as aberrant window of the inner ear. It results in reduction of inner ear impedance and in abnormal exposure of the labyrinthine neuroepithelium to the action of the surrounding structures. The sum of these phenomena leads to the onset of typical cochleo-vestibular symptoms and signs. Among them, pulsatile tinnitus has been attributed to a direct transmission of intracranial vascular activities to labyrinthine fluids. We present the first video-otoscopic documentation of spontaneous pulse-synchronous movements of the tympanic membrane in two patients with superior canal dehiscence...
December 22, 2016: Auris, Nasus, Larynx
https://www.readbyqxmd.com/read/27917854/anatomic-variations-of-posterior-paranasal-sinuses-and-optic-nerve
#20
Alma Efendić, Edin Muharemović, Rasim Skomorac, Hakija Bečulić, Sabina Šestić, Benjamin Halilović, Mersiha Mahmić-Kaknjo
Aim To define direct anatomical relations of the sphenoidal (alae minores), ethmoidal sinuses and optic nerve, with an emphasis on determining the effect of age on pneumatisation and dehiscence. Methods This retrospective, descriptive study involved 60 consecutive patients: 30 patients younger than 30 and30 patients older than 60 years of age. All patients underwent computerized tomography(CT). The relationship of the optic nerve and the sphenoidal and ethmoidal sinuses was classified. The presence of dehiscence in the bone structures, forming the optic canal, was checked...
February 1, 2017: Medicinski Glasnik
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