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superior canal dehiscence

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https://www.readbyqxmd.com/read/28168887/cervical-and-ocular-vemp-testing-in-diagnosing-superior-semicircular-canal-dehiscence
#1
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/28116976/relationship-between-surgically-treated-superior-canal-dehiscence-syndrome-and-body-mass-index
#2
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...
January 1, 2017: Otolaryngology—Head and Neck Surgery
https://www.readbyqxmd.com/read/28081534/enhanced-auditory-sensitivity-to-body-vibrations-in-superior-canal-dehiscence-syndrome
#3
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...
January 13, 2017: 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
#4
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
#5
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
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...
September 14, 2016: Otology & Neurotology
https://www.readbyqxmd.com/read/27565386/endoscopic-assisted-repair-of-superior-canal-dehiscence
#12
REVIEW
Yew Song Cheng, Elliott D Kozin, Daniel J Lee
Superior canal dehiscence (SCD) is a bony defect of the superior canal that can cause vestibular and/or auditory symptoms. Surgical repair of SCD provides effective relief from symptoms, and the middle fossa craniotomy approach with binocular microscopy offers direct visualization and surgical access to the arcuate eminence. However, for SCDs located along the downsloping tegmen medial to the peak of the arcuate eminence, a direct light of sight may be obscured, rendering visualization with traditional microscopy difficult...
October 2016: Otolaryngologic Clinics of North America
https://www.readbyqxmd.com/read/27556420/adaptation-and-compensation-of-vestibular-responses-following-superior-canal-dehiscence-surgery
#13
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
#14
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/27525706/audiologic-cvemp-and-radiologic-progression-in-superior-canal-dehiscence-syndrome
#15
Sarah Lookabaugh, Marlien E F Niesten, Maryanna Owoc, Elliott D Kozin, Wilko Grolman, Daniel J Lee
OBJECTIVE: To assess the change in hearing, vestibular function, and size of superior canal dehiscence (SCD) in patients with SCD syndrome over time. PATIENTS: Adult patients with SCD in one or both ears with documented sign and symptom progression, as shown by the medical record, audiometry, cervical vestibular-evoked myogenic potentials (cVEMP), and computed tomography (CT). INTERVENTION: Audiometry, cVEMPs, and temporal bone CT were performed on patients with high clinical suspicion of disease progression...
October 2016: Otology & Neurotology
https://www.readbyqxmd.com/read/27525621/correlation-of-superior-canal-dehiscence-surface-area-with-vestibular-evoked-myogenic-potentials-audiometric-thresholds-and-dizziness-handicap
#16
Jacob B Hunter, Brendan P O'Connell, Jianing Wang, Srijata Chakravorti, Katie Makowiec, Matthew L Carlson, Benoit Dawant, Devin L McCaslin, Jack H Noble, George B Wanna
OBJECTIVE: To correlate objective measures of vestibular and audiometric function as well as subjective measures of dizziness handicap with the surface area of the superior canal dehiscence (SCD). STUDY DESIGN: Retrospective chart review and radiological analysis. SETTING: Single tertiary academic referral center. PATIENTS: Preoperative computed tomography imaging, patient survey, audiometric thresholds, and vestibular evoked myogenic potential (VEMP) testing in patients with confirmed SCD...
September 2016: Otology & Neurotology
https://www.readbyqxmd.com/read/27496538/controlled-exploration-of-the-effects-of-conductive-hearing-loss-on-wideband-acoustic-immittance-in-human-cadaveric-preparations
#17
Gabrielle R Merchant, Saumil N Merchant, John J Rosowski, Hideko Heidi Nakajima
Current clinical practice cannot distinguish, with any degree of certainty, the multiple pathologies that produce conductive hearing loss in patients with an intact tympanic membrane and a well-aerated middle ear without exploratory surgery. The lack of an effective non-surgical diagnostic procedure leads to unnecessary surgery and limits the accuracy of information available during pre-surgical consultations with the patient. A non-invasive measurement to determine the pathology responsible for a conductive hearing loss prior to surgery would be of great value...
August 3, 2016: Hearing Research
https://www.readbyqxmd.com/read/27493147/mri-in-patients-with-chronic-pubalgia-is-precise-useful-information-provided-to-the-surgeon-a-case-control-study
#18
A Larbi, L Pesquer, G Reboul, P Omoumi, A Perozziello, P Abadie, P Loriaut, P Copin, E Ducouret, B Dallaudière
BACKGROUND: Recent studies described that MRI is a good examination to assess damage in chronic athletic pubalgia (AP). However, to our knowledge, no studies focus on systematic correlation of precise tendon or parietal lesion in MRI with surgery and histological assessment. Therefore, we performed a case-control study to determine if MRI can precisely assess Adductor longus (AL) tendinopathy and parietal lesion, compared with surgery and histology. HYPOTHESIS: MRI can determine if AP comes from pubis symphysis, musculotendinous or inguinal orifice structures...
October 2016: Orthopaedics & Traumatology, Surgery & Research: OTSR
https://www.readbyqxmd.com/read/27466886/taste-disturbance-due-to-cochlear-implant-stimulation
#19
Corey S Shayman, Jessica L Middaugh, Timothy E Hullar
OBJECTIVE: To characterize stimulation of taste fibers in the facial nerve following cochlear implantation. PATIENT: A 34-year old presented with reversible dysgeusia following activation of a cochlear implant. INTERVENTION: Reprogramming targeted to specific offending electrodes reduced symptom intensity. Computed tomography demonstrated dehiscence of the bone separating the labyrinthine segment of the facial nerve and the basal turn of the cochlea in proximity to the electrode array...
September 2016: Otology & Neurotology
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
#20
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
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