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  • Title: Transmastoid middle fossa craniotomy repair of superior semicircular canal dehiscence using a soft tissue graft.
    Author: Teixido M, Seymour PE, Kung B, Sabra O.
    Journal: Otol Neurotol; 2011 Jul; 32(5):877-81. PubMed ID: 21659938.
    Abstract:
    OBJECTIVE: To describe the successful surgical treatment of 5 cases of superior semicircular canal dehiscence via a transmastoid middle fossa craniotomy using a soft tissue graft. DESIGN: Case report. SETTING: Private practice otologic referral center. RESULTS: All patients have experienced reduction in auditory and vestibular symptoms. Pulsatile tinnitus and autophony are now absent in the operated ears. Chronic disequilibrium is subjectively improved. Patients with sound evoked eye movements no longer have sound sensitivity on the operated side. Head thrust testing indicates no obstruction of the operated superior canal in all patients with normal head thrust preoperatively. Audiometry is unchanged from preoperation, and cervical vestibular-evoked myogenic potential thresholds have increased on the operated side in 4 of 4 patients. Three patients had dehiscence at the superior petrosal sinus inaccessible to standard middle fossa repair. All patients were discharged to home the morning after surgery. CONCLUSION: Transmastoid craniotomy repair of the superior semicircular canal dehiscence using a soft tissue graft offers numerous advantages over traditional surgical approaches and can be performed safely in the outpatient setting. The strategy is particularly useful in patients with dehiscence at the superior petrosal sinus. This article will review our strategy and discuss the advantages and disadvantages of the different surgical treatments used for patients with severe symptoms from superior canal dehiscence.
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