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Symptoms, findings and treatment in patients with dehiscence of the superior semicircular canal
Vise andre og tillknytning
2001 (engelsk)Inngår i: Acta Oto-Laryngologica, ISSN 0001-6489, E-ISSN 1651-2251, Vol. 121, nr 1, s. 68-75Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Recently Minor and co-workers described patients with sound- and pressure-induced vertigo due to dehiscence of the superior semicircular canal. Identifying patients with this 'new' vestibular entity is important, not only because the symptoms are sometimes very incapacitating, but also because they can be treated. We present symptoms and findings in eight such patients, all of whom reported pressure-induced vertigo that increased during periods of upper respiratory infections. Pulse-synchronous tinnitus and gaze instability during head movements were also common complaints. All patients lateralized Weber's test to the symptomatic ear. In some of the patients the audiogram also revealed a small conductive hearing loss. However, the stapedius reflexes were always normal. A vertical/torsional eye movement related to the superior semicircular canal was seen in most of the patients in response to pressure changes and/or sound stimulation. One patient also had superior canal-related positioning nystagmus. Testing vestibular evoked myogenic potentials revealed in all patients a vestibular hypersensitivity to sounds. In the coronal high-resolution 1-mm section CT scans the dehiscence was visible on 1 to 4 sections. Moreover, the skull base was rather thin in this area and cortical bone separating the middle ear and the antrum from the middle cranial fossa was absent in many of the patients. Two of the patients have undergone plugging of the superior semicircular canal using a transmastoid approach and both patients were relieved of the pressure-induced symptoms.

sted, utgiver, år, opplag, sider
2001. Vol. 121, nr 1, s. 68-75
Emneord [en]
fistula, myogenic potentials, pressure, sound, Tullio, VEMP.
HSV kategori
Identifikatorer
URN: urn:nbn:se:kth:diva-45650DOI: 10.1080/000164801300006308ISI: 000167205600013PubMedID: 11270498OAI: oai:DiVA.org:kth-45650DiVA, id: diva2:452860
Merknad
QC 20111102Tilgjengelig fra: 2011-10-31 Laget: 2011-10-31 Sist oppdatert: 2018-01-12bibliografisk kontrollert

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