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Related Experiment Video

Updated: Jul 8, 2026

Endaural Endoscopic Atticoantrotomy (Retrograde Mastoidectomy) using a Constant Suction Bone-drilling Technique

Endaural Endoscopic Atticoantrotomy (Retrograde Mastoidectomy) using a Constant Suction Bone-drilling Technique

Published on: May 23, 2021

Transmastoid superior semicircular canal occlusion.

Sumit K Agrawal¹, Lorne S Parnes

¹Department of Otolaryngology, University of Western Ontario, London, Canada.

Otology & Neurotology : Official Publication of the American Otological Society, American Neurotology Society [And] European Academy of Otology and Neurotology

|January 9, 2008

Summary

A novel transmastoid occlusion technique for superior semicircular canal dehiscence (SSCD) offers a viable alternative to traditional middle fossa surgery. This method successfully preserved or improved hearing and resolved vestibular symptoms in all patients.

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Area of Science:

Otolaryngology
Neurosurgery
Vestibular Disorders

Background:

Superior semicircular canal dehiscence (SSCD) is a condition often treated with middle cranial fossa surgery.
Traditional methods include canal plugging or resurfacing, which can be invasive.

Observation:

A retrospective case review of three patients with symptomatic, CT-proven SSCD was conducted.
A novel transmastoid superior semicircular canal occlusion technique was employed.

Findings:

The transmastoid technique involved occluding the canal on either side of the dehiscence using bone pate.
All patients experienced preserved or improved hearing and successful resolution of vestibular symptoms.
One patient had previously undergone an unsuccessful middle fossa repair.

Implications:

Transmastoid occlusion is a potential alternative to the middle fossa approach for SSCD.
This technique avoids craniotomy and temporal lobe retraction, offering advantages for experienced otologists.
Careful technique and bone pate use are crucial for optimal auditory and vestibular outcomes.