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Superior Semicircular Canal Ampullae Dehiscence As Part of the Spectrum of the Third Window Abnormalities: A Case
Eugen Constant Ionescu1, Nasser Al Tamami1, Alexandra Neagu1
1Service Audiologie et Explorations Otoneurologiques, Hospices Civils de Lyon, Centre Hospitalo-Universitaire Lyon, Lyon, France.
Abstract:
A 60-year-old man was referred to the ENT department for intense episodic vertigo triggered by loud sounds. Pure tone audiometry and otoneurological assessment, including videonystagmography using auditory stimulation and cervical vestibular evoked myogenic potential measures, conducted to the hypothesis of a third window syndrome in the left ear. Results from the high-resolution computed tomography of the petrous bone confirmed the hypothesis and revealed the presence of a submillimeter semicircular canal dehiscence, located between the left lateral and superior semicircular canal ampullae on the left side.
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