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Superior semicircular canal dehiscence

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https://www.readbyqxmd.com/read/28418791/superior-semicircular-canal-dehiscence-symptoms-unmasked-by-ossicular-chain-reconstruction
#1
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
#2
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
#3
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/28321386/computerized-assessment-of-superior-semicircular-canal-dehiscence-size-using-advanced-morphological-imaging-operators
#4
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
#5
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...
February 1, 2017: Otolaryngology—Head and Neck Surgery
https://www.readbyqxmd.com/read/27861193/a-comparison-of-surgical-treatments-for-superior-semicircular-canal-dehiscence-a-systematic-review
#6
Fuat Ziylan, Ahmet Kinaci, Andy J Beynon, Henricus P M Kunst
OBJECTIVE: We investigate the postoperative subjective and objective outcomes of different surgical treatments for superior semicircular canal dehiscence (SSCD): vestibular signs, auditory signs, vestibular evoked myogenic potential test, pure tone audiogram, speech audiogram, or video-nystagmography. DATA SOURCES: An electronic search performed in the PubMed, Cochrane Library, and EMBASE databases on 15th of September 2015. A systematic search was conducted. Articles were included if written in English, Dutch, German, or French language...
January 2017: Otology & Neurotology
https://www.readbyqxmd.com/read/27742966/-dehiscence-syndromes-diagnosis-and-treatment
#7
A Ernst, I Todt, J Wagner
BACKGROUND: Dehiscence syndromes of the semicircular canals are a relatively new group of neurotological disorders. They have a variety of symptoms with hearing/balance involvement. Younger patients have clinically relevant symptoms in only about one third of cases. In addition to etiology and pathogenesis, the present paper describes diagnostic and therapeutic possibilities using a patient series of the authors. MATERIALS AND METHODS: This nonrandomized prospective study included 52 patients with uni-/bilateral dehiscence syndromes of the superior and/or posterior canal (SCDS/PCDS), diagnosed with high-resolution computed tomography (HR-CT) of the petrous bone...
November 2016: HNO
https://www.readbyqxmd.com/read/27739592/risk-of-progressive-hearing-loss-in-untreated-superior-semicircular-canal-dehiscence
#8
Neil S Patel, Jacob B Hunter, Brendan P O'Connell, Natalie M Bertrand, George B Wanna, Matthew L Carlson
OBJECTIVE: Patients with incidental or minimally symptomatic superior semicircular canal dehiscence (SSCD) are usually observed, without surgical repair. However, it remains unknown whether a labyrinthine fistula of the superior semicircular canal is associated with progressive conductive or sensorineural hearing loss over time. STUDY DESIGN: Retrospective review at two tertiary care academic referral centers. METHODS: Adults analyzed were diagnosed with SSCD by high-resolution temporal bone computed tomography and vestibular evoked myogenic potential testing and observed with a minimum of two sequential audiograms...
October 14, 2016: Laryngoscope
https://www.readbyqxmd.com/read/27638078/otologic-disorders-causing-dizziness-including-surgery-for-vestibular-disorders
#9
REVIEW
P Bertholon, A Karkas
This chapter will focus on vertigo/dizziness due to inner-ear malformations, labyrinthine fistula, otosclerosis, infectious processes, and autoimmune inner-ear disorders. Inner-ear malformation due to dehiscence of the superior semicircular canal is the most recently described inner-ear malformation. Vertigo/dizziness is typically induced by sound and pressure stimuli and can be associated with auditory symptoms (conductive or mixed hearing loss). Labyrinthine fistula, except after surgery for otosclerosis, in the context of trauma or chronic otitis media with cholesteatoma, still remains a challenging disorder due to multiple uncertainties regarding diagnostic and management strategies...
2016: Handbook of Clinical Neurology
https://www.readbyqxmd.com/read/27636391/incidence-of-pediatric-superior-semicircular-canal-dehiscence-and-inner-ear-anomalies-a-large-multicenter-review
#10
Eric M Sugihara, Seilesh C Babu, Dennis J Kitsko, Michael S Haupert, Prasad J Thottam
OBJECTIVE: To determine the pediatric incidence and association of superior semicircular canal dehiscence (SSCD) with inner ear (IE) anomalies. STUDY DESIGN: Retrospective chart review. SETTING: Two tertiary referral centers. PATIENTS: Children less than 18 years who received a 0.5 mm or less collimated computed tomography study including the temporal bones between 2010 and 2013 for reasons including, but not limited to, hearing loss, trauma, and infection...
October 2016: Otology & Neurotology
https://www.readbyqxmd.com/read/27631835/cdh23-related-hearing-loss-a-new-genetic-risk-factor-for-semicircular-canal-dehiscence
#11
Kathryn Y Noonan, Jack Russo, Jun Shen, Heidi Rehm, Sara Halbach, Einar Hopp, Sarah Noon, Jacqueline Hoover, Clifford Eskey, James E Saunders
OBJECTIVE: To investigate the prevalence and relative risk of semicircular canal dehiscence (SCD) in pediatric patients with CDH23 pathogenic variants (Usher syndrome or non-syndromic deafness) compared with age-matched controls. STUDY DESIGN: Retrospective cohort study. SETTING: Multi-institutional study. PATIENTS: Pediatric patients (ages 0-5 years) were compared based on the presence of biallelic pathogenic variants in CDH23 with pediatric controls who underwent computed tomography (CT) temporal bone scan for alternative purposes...
December 2016: Otology & Neurotology
https://www.readbyqxmd.com/read/27556420/adaptation-and-compensation-of-vestibular-responses-following-superior-canal-dehiscence-surgery
#12
Georgios Mantokoudis, Ali S Saber Tehrani, Aaron L Wong, Yuri Agrawal, Angela Wenzel, John P Carey
OBJECTIVE: To describe vestibulo-ocular function and compensatory mechanisms in the immediate postoperative period after superior canal dehiscence surgery. STUDY DESIGN: Prospective longitudinal study. SETTING: Tertiary medical center. PATIENTS: Five patients who underwent plugging of superior semicircular canal via middle cranial fossa approach. INTERVENTIONS: Bedside quantitative video head impulse testing (vHIT)...
October 2016: Otology & Neurotology
https://www.readbyqxmd.com/read/27554515/the-history-and-evolution-of-surgery-on-the-vestibular-labyrinth
#13
James G Naples, Marc D Eisen
The history of surgery on the vestibular labyrinth is rich but sparsely documented in the literature. The story begins over a century ago with the labyrinthectomy in an era that consisted exclusively of ablative surgery for infection or vertigo. Improved understanding of vestibular physiology and pathology produced an era of selective ablation and hearing preservation that includes semicircular canal occlusion for benign paroxysmal positional vertigo. An era of restoration began with a discovery of superior semicircular canal dehiscence and its repair...
November 2016: Otolaryngology—Head and Neck Surgery
https://www.readbyqxmd.com/read/27385626/comparison-of-radiologically-and-histologically-determined-thickness-of-bone-overlying-the-superior-semicircular-canal-in-sixty-six-cadaveric-specimens-impact-on-the-diagnosis-of-minor-s-syndrome
#14
J S Sandhu, J Manickavasagam, D Connolly, A Raghavan, M Fernando, J Ray
High-resolution CT data confirms the presence of superior semicircular canal dehiscence in 3% of specimens. Analysis of inter-reporter measurements of dehiscence shows excellent correlation. Radiological data under-estimates the bone thickness overlying the superior semicircular canal (SSC) and therefore over-estimates the incidence of dehiscence compared to histological data. Radiological findings must be correlated with audiological data in order to diagnose Minor's Syndrome accurately. This article is protected by copyright...
July 6, 2016: Clinical Otolaryngology
https://www.readbyqxmd.com/read/27369812/magnetic-resonance-imaging-and-computed-tomography-for-diagnosing-semicircular-canal-dehiscence
#15
Mikail Inal, Veysel Burulday, Nuray Bayar Muluk, Ahmet Kaya, Gökçe Şimşek, Birsen Ünal Daphan
OBJECTIVES: We investigated the semicircular canal (SC) dehiscence using temporal computed tomography (CT) and magnetic resonance (MR) imaging. METHODS: We retrospectively reviewed 114 (228 ears) consecutive MR images and CT scans of the temporal bones for dehiscence of the SCs. In the 1.5 Tesla (T) MR imaging, T1 and T2-weighted images were obtained. Dehiscence of the SCs was defined by absence of high attenuation bone coverage on the CT scans, and absence of low-signal bone margins on the MR images...
August 2016: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/27348389/an-easy-and-reliable-method-to-locate-the-dehiscence-during-middle-fossa-superior-canal-dehiscence-surgery-it-is-a-c-inch
#16
Neil S Patel, Jacob B Hunter, Brendan P O'Connell, George B Wanna, Matthew L Carlson
OBJECTIVE: The middle fossa floor lacks reliable surface landmarks. In cases of superior semicircular canal dehiscence (SSCD), multiple skull base defects may be present, further confounding the location of the labyrinth. Misidentification of the SSCD during surgery may lead to treatment failure or sensorineural hearing loss. Anecdotally, the authors have observed the distance from the lateral edge of the craniotomy to the SSCD to be consistently 1 inch. Herein, we present radiologic evidence of this practical and clinically useful relationship...
September 2016: Otology & Neurotology
https://www.readbyqxmd.com/read/27327868/outcomes-of-transmastoid-surgery-for-superior-semicircular-canal-dehiscence-syndrome
#17
Harry R F Powell, Sherif S Khalil, Shakeel R Saeed
OBJECTIVE: To present the management strategy and outcomes for our series of superior semicircular canal dehiscence syndrome (SSCDS) patients. STUDY DESIGN: Retrospective cross-sectional study. SETTING: Tertiary referral center. PATIENTS: Thirty-seven consecutive patients referred from June 2011 to January 2015. Diagnosis of SSCDS based on presence of classical symptoms, computerized tomography, and concordant reduction in cervical vestibular evoked myogenic potentials...
August 2016: Otology & Neurotology
https://www.readbyqxmd.com/read/27221578/lateral-skull-base-attenuation-in-superior-semicircular-canal-dehiscence-and-spontaneous-cerebrospinal-fluid-otorrhea
#18
Habib G Rizk, Jonathan L Hatch, Shawn M Stevens, Paul R Lambert, Ted A Meyer
OBJECTIVES: (1) To quantitatively assess the lateral skull base thickness in patients with superior semicircular canal dehiscense (SSCD) using a standardized and validated radiographic measure and to compare it with that of a population with spontaneous cerebrospinal fluid otorrhea (CSFO). (2) To analyze demographic and clinical factors associated with skull base thickness in the SSCD group. STUDY DESIGN: Case series with chart review. SETTING: Tertiary neurotologic referral center...
October 2016: Otolaryngology—Head and Neck Surgery
https://www.readbyqxmd.com/read/27089972/a-case-of-patulous-eustachian-tube-associated-with-dizziness-induced-by-nasal-respiration
#19
Naoharu Kitajima, Akemi Sugita-Kitajima, Seiji Kitajima
OBJECTIVE: To determine the relationship between Eustachian tube function and inner ear function in patulous Eustachian tube (pET). METHODS: We encountered a patient with pET accompanied by dizziness that was induced by nasal respiration. Eye movements were recorded using video-oculography, and Eustachian tube function was assessed using a Eustachian tube function analyzer. Horizontal and vertical components of pupil position were assessed to test fixation, positional, and positioning nystagmus...
December 2016: Auris, Nasus, Larynx
https://www.readbyqxmd.com/read/27050655/effect-of-round-window-reinforcement-on-hearing-a-temporal-bone-study-with-clinical-implications-for-surgical-reinforcement-of-the-round-window
#20
Inge Wegner, Mostafa M A S Eldaebes, Thomas G Landry, Robert B Adamson, Wilko Grolman, Manohar L Bance
HYPOTHESIS: Round window reinforcement leads to conductive hearing loss. BACKGROUND: The round window is stiffened surgically as therapy for various conditions, including perilymphatic fistula and superior semicircular canal dehiscence. Round window reinforcement reduces symptoms in these patients. However, it also reduces fluid displacement in the cochlea and might therefore increase conductive hearing loss. METHODS: Perichondrium was applied to the round window membrane in nine fresh-frozen, nonpathologic temporal bones...
June 2016: Otology & Neurotology
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