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Superior semicircular canal dehiscence

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https://www.readbyqxmd.com/read/29153260/diagnostic-criteria-for-patulous-eustachian-tube-a-proposal-by-the-japan-otological-society
#1
Toshimitsu Kobayashi, Masahiro Morita, Satoshi Yoshioka, Kunihiro Mizuta, Shigeto Ohta, Toshiaki Kikuchi, Tatsuya Hayashi, Akihiro Kaneko, Nobumasa Yamaguchi, Sho Hashimoto, Hiromi Kojima, Shingo Murakami, Haruo Takahashi
Patulous Eustachian Tube (PET) is of increasing importance in otology. However, despite the abundance of diseases requiring a differential diagnosis from PET, such as superior semicircular canal dehiscence syndrome, perilymphatic fistula, acute low-tone sensorineural hearing loss, etc., there are currently no established diagnostic criteria for PET. In view of these circumstances, the Japan Otological Society (JOS) Eustachian Tube Committee proposed the diagnostic criteria for Patulous Eustachian Tube in 2012, in order to promote clinical research on PET...
November 15, 2017: Auris, Nasus, Larynx
https://www.readbyqxmd.com/read/29116385/hearing-eyeball-and-or-eyelid-movements-on-the-side-of-a-unilateral-superior-semicircular-canal-dehiscence
#2
Pierre Bertholon, Pierre Reynard, Yann Lelonge, Roland Peyron, François Vassal, Alexandre Karkas
Hearing of eyeball movements has been reported in superior semicircular canal dehiscence (SSCD), but not hearing of eyelid movements. Our main objective was to report the hearing of eyeball and/or eyelid movements in unilateral SSCD. Our secondary objective was to access its specificity to SSCD and discuss the underlying mechanism. Six patients with SSCD who could hear their eyeball and/or eyelid movements were retrospectively reviewed. With the aim of comparisons, eight patients with an enlarged vestibular aqueduct (EVA), who share the same mechanism of an abnormal third window, were questioned on their ability to hear their eyeball and/or eyelid movements...
November 8, 2017: European Archives of Oto-rhino-laryngology
https://www.readbyqxmd.com/read/29094067/comorbidities-confounding-the-outcomes-of-surgery-for-third-window-syndrome-outlier-analysis
#3
P Ashley Wackym, Heather T Mackay-Promitas, Shaban Demirel, Gerard J Gianoli, Martin S Gizzi, Dale M Carter, David A Siker
Objective: Patients with third window syndrome and superior semicircular canal dehiscence (SSCD) symptoms whose surgical outcomes placed them as outliers were systematically studied to determine comorbidities that were responsible for their poor outcomes due to these confounding factors. Study Design: Observational analytic case-control study in a tertiary referral center. Methods: Twelve adult patients with clinical SSCD syndrome underwent surgical management and had outcomes that did not resolve all of their subjective symptoms...
October 2017: Laryngoscope Investigative Otolaryngology
https://www.readbyqxmd.com/read/29022108/middle-cranial-fossa-approach-for-the-repair-of-superior-semicircular-canal-dehiscence-is-associated-with-greater-symptom-resolution-compared-to-transmastoid-approach
#4
REVIEW
Thien Nguyen, Carlito Lagman, John P Sheppard, Prasanth Romiyo, Courtney Duong, Giyarpuram N Prashant, Quinton Gopen, Isaac Yang
BACKGROUND: Superior semicircular canal dehiscence (SSCD) is a disorder of the skull base that is gaining increasing recognition among neurosurgeons. Traditionally, the middle cranial fossa (MCF) approach has been used for the surgical repair of SSCD. However, the transmastoid (TM) approach is an alternative strategy that has demonstrated promising results. METHODS: We performed independent searches of a popular database to identify studies that described outcomes following the surgical repair of SSCD through MCF and TM approaches...
October 11, 2017: Acta Neurochirurgica
https://www.readbyqxmd.com/read/28990655/round-window-plugging-in-the-treatment-of-superior-semicircular-canal-dehiscence
#5
Eric F Succar, Periakaruppan V Manickam, Sara Wing, Jeffrey Walter, Joseph S Greene, William J Azeredo
OBJECTIVES/HYPOTHESIS: Objectives were to describe the use of round window plugging for superior semicircular canal dehiscence syndrome and review further recommendations regarding the procedure based on our experience and to compare results with recent literature on round window plugging. STUDY DESIGN: Retrospective case series. METHODS: Fourteen patients underwent round window plugging for superior semicircular canal dehiscence at our institution from 2012 to 2015...
October 9, 2017: Laryngoscope
https://www.readbyqxmd.com/read/28945893/novel-method-of-measuring-canal-dehiscence-and-evaluation-of-its-potential-as-a-predictor-of-symptom-outcomes-after-middle-fossa-craniotomy
#6
Carlito Lagman, Joel S Beckett, Lawrance K Chung, Cheng Hao Jacky Chen, Brittany L Voth, Bilwaj Gaonkar, Quinton Gopen, Isaac Yang
BACKGROUND: Superior semicircular canal dehiscence (SSCD) is an osseous defect of the arcuate eminence of the petrous temporal bone. Strategies for measuring dehiscence size are variable, and the usefulness of such parameters remains in clinical equipoise. OBJECTIVE: To present a novel method of measuring dehiscence volume and to evaluate its potential as a predictor of symptom outcomes after surgical repair of SSCD. METHODS: High-resolution computed tomographic temporal bone images were imported into a freely available segmentation software...
August 9, 2017: Neurosurgery
https://www.readbyqxmd.com/read/28922894/minimally-invasive-middle-fossa-keyhole-craniectomy-for-repair-of-superior-semicircular-canal-dehiscence
#7
(no author information available yet)
No abstract text is available yet for this article.
October 1, 2017: Operative Neurosurgery (Hagerstown, Md.)
https://www.readbyqxmd.com/read/28833207/semicircular-canal-dehiscence-among-idiopathic-intracranial-hypertension-patients
#8
Phoebe Kuo, Kenneth A Bagwell, Gino Mongelluzzo, Christopher A Schutt, Ajay Malhotra, Babar Khokhar, John F Kveton
OBJECTIVES/HYPOTHESIS: The cause of superior semicircular canal dehiscence (SSCD) is unknown. Because of a demonstrated association with tegmental defects and obesity, some have suggested idiopathic intracranial hypertension (IIH) could contribute by eroding the bone over the canal and resulting in SSCD. However, an association between IIH and SSCD has not previously been evaluated. Our objective was to evaluate an association between IIH and SSCD. STUDY DESIGN: Retrospective cohort...
August 22, 2017: Laryngoscope
https://www.readbyqxmd.com/read/28725523/a-method-of-locating-the-dehiscence-during-middle-fossa-approach-for-superior-semicircular-canal-dehiscence-surgery
#9
Joel S Beckett, Lawrance K Chung, Carlito Lagman, Brittany L Voth, Cheng Hao Jacky Chen, Bilwaj Gaonkar, Quinton Gopen, Isaac Yang
Objectives  Superior semicircular canal dehiscence (SSCD) results from a defect in the middle cranial fossa floor. One challenge during SSCD repair is the lack of a consistent landmark. This study proposes a reference point above the external auditory canal at the level of the zygoma as the inferior craniectomy edge during surgery. Design  This is a retrospective review of patients with SSCD. Setting/Participants  A total of 72 cases of SSCD in 60 patients were repaired via a middle fossa approach at a single institution...
August 2017: Journal of Neurological Surgery. Part B, Skull Base
https://www.readbyqxmd.com/read/28657952/diagnosis-of-superior-semicircular-canal-dehiscence-in-the-presence-of-concomitant-otosclerosis
#10
Michael Yong, Erica Zaia, Brian Westerberg, Jane Lea
OBJECTIVE: To review three patients with concurrent otosclerosis and superior canal dehiscence identified before operative intervention and provide a practical diagnostic approach to this clinical scenario. STUDY DESIGN: Retrospective patient series. SETTING: Tertiary/quaternary referral center. PATIENTS: Individuals with confirmed diagnoses of concurrent otosclerosis and superior semicircular canal dehiscence syndrome...
September 2017: Otology & Neurotology
https://www.readbyqxmd.com/read/28641325/superior-canal-dehiscence-syndrome-associated-with-scuba-diving
#11
Naoharu Kitajima, Akemi Sugita-Kitajima, Seiji Kitajima
A 28-year-old female diver presented with dizziness and difficulty clearing her left ear whilst scuba diving. Her pure-tone audiometry and tympanometry were normal. Testing of Eustachian tube function revealed tubal stenosis. Video-oculography revealed a predominantly torsional nystagmus while the patient was in the lordotic position. Fistula signs were positive. High-resolution computed tomography (HRCT) of the temporal bone revealed a diagnosis of bilateral superior semicircular canal dehiscence (SCDS). Cervical vestibular-evoked myogenic potential (cVEMP) testing showed that the amplitude of the cVEMP measured from her left ear was larger than that from the right...
June 2017: Diving and Hyperbaric Medicine: the Journal of the South Pacific Underwater Medicine Society
https://www.readbyqxmd.com/read/28628917/anatomical-characteristics-of-facial-nerve-and-cochlea-interaction
#12
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...
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
#13
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
#14
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...
September 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
#15
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
#16
REVIEW
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...
August 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
#17
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...
August 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
#18
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
#19
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
#20
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
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