Related Experiment Video
Updated: Jul 24, 2025
08:38
Testing of all Six Semicircular Canals with Video Head Impulse Test Systems
Published on: April 18, 2019
30.8K
Summary
A dehiscent superior semicircular canal causes sound or pressure-induced vertigo and other auditory symptoms. High-resolution CT scans diagnose this condition, which involves a missing bony cover over the canal, creating a third mobile window.
Area of Science:
- Otolaryngology
- Neuroscience
- Radiology
Context:
- Disorders of equilibrium are common reasons for medical consultations.
- A dehiscent superior semicircular canal is a rare but characteristic cause of specific vestibular and auditory symptoms.
Purpose:
- To describe the clinical presentation, diagnostic findings, and therapeutic options for a dehiscent superior semicircular canal.
Summary:
- A dehiscent superior semicircular canal presents with characteristic symptoms including sound/pressure-induced vertigo, autophonia, pulsatile tinnitus, hyperacusis, and aural fullness.
- Diagnosis is confirmed by high-resolution CT scans of the temporal bone, revealing a defect in the bony covering of the superior semicircular canal, creating a "third mobile window".
Impact:
- This condition requires thorough diagnostic workup.
- Surgical options like plugging or resurfacing may be considered for symptomatic relief.
