Related Experiment Video
Updated: Aug 19, 2026
Endoscopic Cholesteatoma Surgery
Published on: January 19, 2022
Operative management of superior semicircular canal dehiscence
Anthony A Mikulec1, Dennis S Poe, Michael J McKenna
1Department of Otology and Laryngology, Harvard Medical School, Boston, Massachusetts, USA.
Objective:
To assess the outcomes of patients undergoing surgical management of superior semicircular canal dehiscence (SSCD).
Study Design:
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.
