Operative management of superior semicircular canal dehiscence.
OBJECTIVE
To assess the outcomes of patients undergoing surgical management of superior semicircular canal dehiscence (SSCD).


METHODS
Retrospective review.


METHODS
The medical records of all patients undergoing surgical treatment for SSCD at our institution between 2000 and 2004 were reviewed.


RESULTS
Eleven patients underwent unilateral operative management via a middle fossa approach. Ten patients were treated successfully by canal plugging and one unsuccessfully by canal re-roofing. Plugging of SSCD provided resolution of sound- and pressure-induced nystagmus, autophony, and conductive hearing loss (HL). One patient experienced a mild high-frequency sensorineural HL and two patients experienced both a mild high-frequency sensorineural HL and a reduction in vestibular function. Two additional patients underwent exploration for SSCD but were found to have a thin layer of bone overlying the canal.


CONCLUSIONS
Plugging of the SSCD, while efficacious in alleviating the symptoms of the disease, may cause loss of labyrinthine function beyond the superior canal.
Mikulec
Anthony A
AA
Department of Otology and Laryngology, Harvard Medical School, Boston, Massachusetts, USA.
Poe
Dennis S
DS
McKenna
Michael J
MJ
D000328:Adult; D001299:Audiometry; D005260:Female; D034381:Hearing Loss / Q000209:etiology*; D006801:Humans; D007759:Labyrinth Diseases / Q000601:surgery*; D008297:Male; D008875:Middle Aged; D012665:Semicircular Canals / Q000473:pathology* / Q000601:surgery*; D015837:Vestibular Diseases / Q000209:etiology*