Superior Semicircular Canal Dehiscence – An Otologic Impersonator
DOI:
https://doi.org/10.34631/sporl.820Keywords:
Dehiscence, Superior Semicircular Canal, Audiogram, Acoustic ReflexesAbstract
Objectives: to identify common clinical characteristics in patients with superior semicircular canal dehiscence (SSCD)in order to increase the diagnostic suspicion of this recently described clinical entity.
Materials and Methods: a retrospective analysis was carried out between 2016 and 2019 and 5 cases were analyzed, corresponding to 8 ears with SSCD, analyzing the accompanying symptoms. The diagnosis of dehiscence was established through computed tomography (CT) of the temporal bone.
Results: Hearing loss was the major complaint being common to all patients. In the 8 ears analyzed, there was a predominance of conduction hearing loss in frequencies below 1000Hz with normal impedance audiometry.
Conclusions: the recognition of these patients, with a third non-physiological window in the bony lining of the superior semicircular canal, makes possible a differential diagnosis that explains a conduction or mixed hearing loss with acoustic reflexes present, thus preventing errors in diagnosis and unnecessary surgery.
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