Semicircular canal dehiscence syndrome

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Synonyms: SCD syndrome

A rare otorhinolaryngologic disease characterized by the uni- or bilateral dehiscence of the bone(s) overlying the superior (most common) lateral or posterior semicircular canal(s). Patients present audiological (autophony aural fullness conductive hearing loss pulsatile tinnitus) and/or vestibular symptoms (sound or pressure-evoked oscillopsia or vertigo characteristic vertical-torsional eye movements) depending on which semicircular canal is affected. Posterior SCD syndrome is associated with high-riding jugular bulb and fibrous dysplasia while lateral SCD syndrome is associated with chronic otitis media and cholesteatoma with or without audiological and vestibular symptoms.

Data from Orphanet are used to provide information on a disease's name, synonym(s), and overview. Reference: Access aggregated data from Orphanet at Orphadata. Orphadata: Free access data from Orphanet. © INSERM 1999. Available on http://www.orphadata.org. Data version July 2024

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