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superior canal dehiscence

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...
October 14, 2016: HNO
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
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
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
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
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
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
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...
August 23, 2016: Otolaryngology—Head and Neck Surgery
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
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
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
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
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
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
Krister Brantberg, Luca Verrecchia
No abstract text is available yet for this article.
February 2016: Journal of Clinical Otorhinolaryngology, Head, and Neck Surgery
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
Jeffrey D Sharon, Seth E Pross, Bryan K Ward, John P Carey
OBJECTIVE: To identify factors associated with surgical failure for superior canal dehiscence syndrome (SCDS) and define rates of complications and cure after revision SCDS repair. STUDY DESIGN: Retrospective patient series. SETTING: Tertiary care referral center. PATIENTS: Adults who underwent revision surgery for SCDS. INTERVENTIONS: None. MAIN OUTCOME MEASURES: Initial surgical approach, intraoperative findings at the time of revision, persistence of symptoms, and complications for revision surgery...
September 2016: Otology & Neurotology
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
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
Taher Valika, Miriam Redleaf
OBJECTIVES: This retrospective chart review demonstrates that the prevalence of middle cranial fossa (MCF) dehiscence on computed tomography (CT) scans increases with age. METHODS: High-resolution temporal bone CT scans, which had been obtained for any otologic complaint, were reviewed independent of all clinical history. Scans showing soft tissue, fluid, trauma, or previous operations were excluded. The CTs from 183 patients (296 ears) were reviewed, blinded for age and body mass index (BMI)...
September 2016: Annals of Otology, Rhinology, and Laryngology
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