Associate Professor University of Colorado School of Medicine Anschutz Medical Campus auror, CO, United States
Disclosure(s):
Samuel P. Gubbels, MD: No relevant relationships to disclose.
PROGRAM DESCRIPTION: Dehiscence of the superior semicircular canal is a relatively new and increasingly recognized pathologic entity causing a wide variety of auditory and vestibular symptoms. When patients have been identified with this condition and worked up appropriately the primary treatment modality is surgical plugging and/or resurfacing of the dehiscence. This has been most often accomplished since the original description of this disorder through a middle fossa craniotomy approach. More recently a number of authors have described a transmastoid approach to allow for plugging and/or resurfacing of the dehiscent area of the superior canal. Doing so avoids a craniotomy with its attendant morbidities however there are a number of important surgical nuances that must be recognized in order for successful treatment through the transmastoid approach.
This Masters of Surgery video presentation will discuss the preoperative evaluation as well as intraoperative technique needed to successfully approach and repair superior semicircular canal dehiscence through a transmastoid technique. In particular we will describe appropriate candidacy for a transmastoid versus middle fossa approach based on high-resolution computed tomography imaging findings. Furthermore we will present a detailed, step-by-step presentation of the transmastoid approach for repair of superior semicircular canal dehiscence. This presentation is intended for surgeons in training and in practice who manage superior semicircular canal dehiscence and assumes only a basic level of understanding of temporal bone and inner ear anatomy. This presentation is supported by the American Academy of Otolaryngology Skull Base Surgery Committee.
