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  • Title: [Superior semicircular canal dehiscence mimicking otosclerosis: usefulness of imaging].
    Author: El Kohen A, Teszler CB, Williams MT, Ayache D.
    Journal: Ann Otolaryngol Chir Cervicofac; 2007 Dec; 124(6):330-2. PubMed ID: 17678868.
    Abstract:
    OBJECTIVES: To emphasize the role of computerized tomography (CT) in the etiologic work-up of stapes surgery failure. MATERIAL AND METHODS: Helical high resolution CT scan of the temporal bone with axial and coronal views and multiplanar reconstructions was performed in a patient who had undergone unsuccessful stapedectomy. RESULTS: CT scan demonstrated a well located prosthesis, the absence of the radiological hallmarks of otosclerosis, and revealed a superior semicircular canal dehiscence (SSCD). The diagnosis of SSCD was retrospectively considered accountable for the preoperative clinical and audiometric presentation that had mimicked otosclerosis. CONCLUSION: CT is the diagnostic test of choice in elucidating stapes surgery failure (with persistent or recurrent conductive hearing loss), whereas SSCD should be systematically considered among its causes.
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