Superior semicircular canal dehiscence syndrome

Area of Science:

• Otolaryngology
• Neuroscience
• Auditory and Vestibular Science

Background:

• Superior semicircular canal dehiscence (SSCD) syndrome is a condition characterized by a bony defect in the superior semicircular canal.
• This defect creates a pathological
• third window
• into the inner ear, leading to abnormal hydroacoustic transmission.
• It presents with diverse vestibular and auditory symptoms in adults and children.

Purpose of the Study:

• To review the etiology, pathophysiology, clinical presentation, diagnostic methods, and surgical treatment options for SSCD syndrome.
• To highlight potential pitfalls in the clinical management of this condition.

Main Methods:

• Review of existing literature on superior semicircular canal dehiscence syndrome.
• Analysis of diagnostic criteria and surgical techniques.
• Discussion of treatment outcomes and potential complications.

Main Results:

• The most frequent bony defect is located over the arcuate eminence.
• Rare defects involve the posteromedial limb, potentially associated with the superior petrosal sinus.
• Surgical repair options include reconstruction or plugging of the defect or round window reinforcement.

Conclusions:

• SSCD syndrome is an increasingly recognized cause of vestibular and auditory dysfunction.
• Surgical intervention is indicated for intractable symptoms unresponsive to conservative management.
• Effective surgical management requires careful consideration of diagnostic findings and potential operative challenges.