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  Patronage of the Polish Society of Audiology and Phoniatrics

vol 10. no 4. December 2011  

 Original articles
Superior semicircular canal dehiscence syndrome – a case report
Marek Zadrożniak, Kamal Morshed, Agnieszka Trojanowska, Marcin Szymański

Superior semicircular canal dehiscence into the floor of the
middle fossa may cause a variety of symptoms, including vertigo,
oscillopsia and nystagmus induced by loud sounds or by stimuli
that change middle ear or intracranial pressure. Auditory
manifestations include conductive hearing loss, autophony and
increased sensitivity to bone-conducted sounds. The diagnosis
is based on positive Tulio phenomenon, Hennebert sign, Valsalva
maneuvers, tuning fork tests, pure tone audiometry, impedance
audiometry, vestibular-evoked myogenic potentials (VEMP)
and high resolution computed tomography scans. After middle
fossa craniotomy and repair of the superior canal dehiscence by
resurfacing or plugging procedure, the patient may get complete
relief of symptoms. We report a case of a woman with bilateral
superior semicircular canal dehiscences which caused mixed
hearing loss and vestibular symptoms. Our patient did not
agree to middle fossa craniotomy and plugging procedure, so
we performed successful and effective BAHA implantation to
restore hearing.

keywords: przetoka kanału półkolistego górnego, niedosłuch przewodzeniowy, niedosłuch mieszany, zawroty głowy, błędnik, tomografia komputerowa, BAHA, superior semicircular canal dehiscence, conductive hearing loss, mixed hearing loss, vertigo, labyrinth, computed t

pages: from 186 to 190

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