ArticleJournal of neurological surgery. Part B, Skull base2026
Tegmen Dehiscence and Audiologic Outcomes in the Middle Fossa Repair of Superior Semicircular Canal Dehiscence.
Article in Journal of neurological surgery. Part B, Skull base, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Objective: To investigate the audiologic presentation and post-surgical audiologic outcomes of superior semicircular canal dehiscence (SSCD) with concurrent tegmen tympani dehiscence with or without dural-ossicular contact. Methods: We reviewed 358 middle fossa repairs of SSCD at an institution from 2011 to 2022. Primary outcomes were preoperative and pre- to postoperative change in pure-tone average (PTA) and low-frequency air-bone gap (LF-ABG). Tegmen tympani dehiscence and dural-ossicular contact status were assessed on CT imaging and treated as independent variables in multivariable models. Results: Compared with the SSCD-alone cohort, the SSCD + tegmen tympani dehiscence group had significantly higher preoperative PTA (B = 5.40; Conclusion: Concurrent SSCD and tegmen tympani dehiscence with or without dural-ossicular contact present with greater preoperative PTA and LF-ABG but no significantly different surgical outcomes compared with SSCD alone. Therefore, although tegmen tympani defects may contribute to greater baseline auditory deficits, the MCF approach offers similar levels of improvement in hearing across both groups.
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