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superior canal dehiscence

Thien Nguyen, Carlito Lagman, John P Sheppard, Courtney Duong, Vera Ong, Jessica Poon, Yasmine Alkhalid, Daniel Azzam, Prasanth Romiyo, Giyarpuram N Prashant, Quinton Gopen, Isaac Yang
BACKGROUND: Superior semicircular canal dehiscence (SSCD) is a bony defect in the osseous shell of the petrous temporal bone. The pathophysiological association between osteoporosis and SSCD remains poorly understood. We aim to investigate the relationships between serum calcium, 25-hydroxyvitamin D, and thyroid stimulating hormone levels, and symptoms in adult patients with SSCD treated through a middle fossa craniotomy. METHODS: Patient demographics and clinical parameters were collected...
February 13, 2018: World Neurosurgery
Rafael Crovetto-Martínez, Carlos Vargas, Iñigo Lecumberri, Amaia Bilbao, Miguel Crovetto-De la Torre, Jaime Whyte-Orozco
OBJECTIVES: Dehiscence of the superior semicircular canal (SSC) has been associated with alteration of the temporomandibular joint, although data explaining this association are lacking. The present study examined the correlations between the presence of dehiscences and thickness of the bone covering the SSC and the roof of the glenoid fossa (RGF). STUDY DESIGN: Computed tomography was used in a cross-sectional analysis of the presence of dehiscences and thickness of the bone overlying the SCC and RGF in 156 temporal bones of 78 patients...
December 29, 2017: Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology
R Gürkov, C Jerin, W Flatz, R Maxwell
BACKGROUND: Superior canal dehiscence syndrome (SCDS) is a relatively rare neurotological disorder that is characterized by a heterogeneous clinical picture. Recently, vestibular evoked myogenic potential (VEMP) measurementwas established for the diagnosis of SCDS. In the present study, a case series of patients with SCDS were analyzed, with a focus on VEMP. METHODS: Four patients with SCDS were prospectively examined with ocular VEMP (oVEMP) and cervical VEMP (cVEMP)...
January 23, 2018: HNO
Renee M Banakis Hartl, Stephen P Cass
Objectives (1) Evaluate changes in subjective symptoms in patients following transmastoid canal plugging for superior semicircular canal dehiscence (SSCD) syndrome. (2) Quantify changes in hearing in patients who have undergone transmastoid canal plugging for SSCD syndrome. Study Design Case series with chart review. Setting Single tertiary care institution. Subjects and Methods We retrospectively reviewed patients with SSCD who underwent repair with canal plugging via a transmastoid approach between January 2012 and January 2017...
March 2018: Otolaryngology—Head and Neck Surgery
Fatma Beyazal Çeliker, Abdulkadir Özgür, Metin Çeliker, Mehmet Beyazal, Arzu Turan, Suat Terzi, Mehmet Fatih İnecikli
OBJECTIVE: This study aimed to evaluate the efficacy of magnetic resonance imaging (MRI) for diagnosing superior semicircular canal dehiscence (SSCD). MATERIALS AND METHODS: The radiological records of patients who were admitted to our clinic with complaints of otologic and neuro-otologic symptoms between October 2014 and December 2015 were retrospectively reviewed. Among these patients, those who underwent both computed tomography and MRI and were reported to have SSCD in the temporal bone on at least one side were included in the study group...
December 14, 2017: Journal of International Advanced Otology
Laura Naert, Raymond Van de Berg, Paul Van de Heyning, Alexandre Bisdorff, Jeffrey D Sharon, Bryan K Ward, Vincent Van Rompaey
OBJECTIVES/HYPOTHESIS: To aggregate symptoms reported by patients with superior canal dehiscence syndrome (SCDS) and to develop an evidence-based symptom set by performing a systematic review of the literature. STUDY DESIGN: Database search and critical assessment of research studies. METHODS: Medline and PubMed databases were searched for articles that reported the preoperative symptoms of adult and pediatric patients with unilateral and bilateral SCDS...
December 27, 2017: Laryngoscope
Gabriela Pereira Bom Braga, Jack H Noble, Eloisa Maria Mello Santiago Gebrim, Robert F Labadie, Ricardo Ferreira Bento
Literature describes that on the 25th gestational week the labyrinth is fully formed and with adult size. However, recent studies have shown that the cranial and labyrinth development continues until 3 years of age. OBJECTIVES: To demonstrate through tomographic study the frequency of semicircular canal dehiscence on nine specimens of stillbirths between 32 and 40 weeks and, through literature review, present another possible etiology for its cause. METHODS: Tomographic study of the temporal bone of 9 specimens of stillbirths between 32 and 40 weeks...
December 22, 2017: Acta Oto-laryngologica
R Gürkov, C Jerin, W Flatz, R Maxwell
BACKGROUND: Superior canal dehiscence syndrome (SCDS) is a relatively rare neurotological disorder that is characterized by a heterogeneous clinical picture. Recently, vestibular evoked myogenic potential (VEMP) measurement was established for the diagnosis of SCDS. In the present study, a case series of patients with SCDS were analyzed, with a focus on VEMP. METHODS: Four patients with SCDS were prospectively examined with ocular VEMP (oVEMP) and cervical VEMP (cVEMP)...
December 14, 2017: HNO
Dinesh Sood, Lokesh Rana, Raman Chauhan, Roshni Shukla, Khanak Nandolia
Objective: To determine the use of multi-detector computed tomography (MDCT) in the diagnostic interpretation of superior semicircular canal dehiscence (SSCD) or thinning and its association with ear pathologies and to find whether it is an acquired condition and its association with increase in age. Materials and methods: study was performed in a tertiary care institute present in a village, following approval of the institutional ethical committee. Retrospective review of temporal bone CT examinations performed between September 2016 and March 2017 was done...
2017: European Journal of Radiology Open
Christine Mau, Naveed Kamal, Saiaditya Badeti, Renuka Reddy, Yu-Lan Mary Ying, Robert W Jyung, James K Liu
The authors provide an update on the clinical manifestations, diagnosis and various approaches to the treatment of superior semicircular canal dehiscence (SSCD). SSCD is a rare condition where the bone overlying the superior semicircular canal thins or dehisces causing characteristic clinical findings. Since this was first reported in 1998 by Minor and colleagues, there has been much advancement made in terms of diagnosis and treatment. Signs and symptoms include a wide variation of both vestibular and auditory manifestations...
February 2018: Journal of Clinical Neuroscience: Official Journal of the Neurosurgical Society of Australasia
Takefumi Kamakura, Joseph B Nadol
Bone remodeling within the otic capsule has been reported to be inhibited especially at or near the cochlea, except under some pathological conditions such as otosclerosis, Paget's disease, or mastoiditis, when bone remodeling can occur. Microcavitations found in periosteal and endosteal layers of human temporal bone specimens without otosclerosis, Paget's disease, or inflammation as reported in the current study are consistent with osteoclastic bone resorption. Thirty-three temporal bones from 33 patients were prepared for light microscopy and classified into 4 groups: histologically proven dehiscence of the superior semicircular canal (SSCD) (n = 3, group 1), age 20 years or younger (n = 10, group 2), age 90 years or older and with otosclerosis (n = 10, group 3), and age 90 years or older without otosclerosis (n = 10, group 4)...
December 9, 2017: Audiology & Neuro-otology
Kimberley S Noij, Maria J Duarte, Kevin Wong, Y Song Cheng, Salwa Masud, Barbara S Herrmann, Hugh D Curtin, Vivek V Kanumuri, John J Guinan, Elliott D Kozin, Osama Tarabichi, David H Jung, Daniel J Lee, Steven D Rauch
OBJECTIVE: To develop a novel approach combining low-frequency air-bone gap (ABG) and cervical vestibular evoked myogenic potential (cVEMP) thresholds to improve screening for superior canal dehiscence (SCD) syndrome. STUDY DESIGN: Retrospective study. SETTING: Tertiary care center. PATIENTS: One hundred forty patients with SCD and 21 healthy age-matched controls were included. Ears for each patient were divided into three groups based on computed tomography (CT) findings: 1) dehiscent, 2) thin, or 3) unaffected...
February 2018: Otology & Neurotology
Oğuzhan Altun, Suayip Burak Duman, Ibrahim Sevki Bayrakdar, Yasin Yasa, Sacide Duman, Sevcihan Günen Yılmaz
OBJECTIVE: This study evaluated the prevalence and morphological characteristics of the superior semicircular canal (SSCC) in cleft lip and palate (CL/P) patients using cone beam computed tomography (CBCT). MATERIALS AND METHODS: CBCT images of 53 CL/P patients (28 males and 25 females) and a control group of 76 patients (42 males and 34 females) were evaluated. Retrospectively, 258 temporal bone images from 129 patients were evaluated in terms of SSCC morphology and divided into a normal pattern (0...
December 4, 2017: Acta Odontologica Scandinavica
Ryan Boerner, Jonathan L Hatch, Elizabeth Harruff, Shaun A Nguyen, Habib G Rizk, Ted A Meyer, Paul R Lambert, Theodore R McRackan
OBJECTIVES: 1) Describe publishing trends for otologic/neurotologic disorders over a 35-year span. 2) Compare trends in publishing with disease prevalence. 3) Evaluate changes in topic and journal specific ranking scores over time. METHODS: PubMed searches were performed on 35 otologic/neurotologic disorders using medical subject headings (MeSH) terms from 1980 to 2015. Searches were limited in scope to the English language. A Mann-Kendall trend analysis evaluated changes in publication frequency as a discrete variable while correcting for total number of articles published per year...
January 2018: Otology & Neurotology
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
Julia Dlugaiczyk
OBJECTIVE: Over the last decade, ocular vestibular evoked myogenic potentials (oVEMPs) have evolved as a new clinical test for dynamic otolith (predominantly utricular) function. The aim of this review is to give an update on the neurophysiological foundations of oVEMPs and their implications for recording and interpreting oVEMP responses in clinical practice. CONCLUSION: Different lines of anatomical, neurophysiological, and clinical evidence support the notion that oVEMPs measure predominantly contralateral utricular function, while cervical cVEMPs are an indicator of ipsilateral saccular function...
December 2017: Otology & Neurotology
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
Pablo Roman-Naranjo, Alvaro Gallego-Martinez, Jose A Lopez Escamez
PURPOSE OF REVIEW: The increased availability of next generation sequencing has enabled a rapid progress in the discovery of genetic variants associated with vestibular disorders. We have summarized molecular genetics finding in vestibular syndromes during the last 18 months. RECENT FINDINGS: Genetic studies continue to shed light on the genetic background of vestibular disorders. Novel genes affecting brain development and otolith biogenesis have been associated with motion sickness...
February 2018: Current Opinion in Neurology
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
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