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Superior semicircular canal dehiscence: a radiological and clinical study
Waleed Moneir1, Ahmed Yasser Darwish1, Yasser Wafeek Khafagy1
1Mansoura Faculty of Medicine, Mansoura, Egypt.
Summary
Superior semicircular canal dehiscence (SSCD) affects 1% of patients, with autophony being the most common symptom. Bone thickness over the superior semicircular canal (SCC) is key for diagnosis.
Area of Science:
- Otolaryngology
- Radiology
- Anatomy
Background:
- Superior semicircular canal dehiscence (SSCD) is a condition affecting the inner ear.
- Its prevalence and clinical manifestations require further radiological assessment.
Purpose of the Study:
- To radiologically assess the prevalence of SSCD.
- To correlate SSCD with clinical presentations and patient age.
Main Methods:
- Prospective cohort study of 200 patients (400 temporal bones).
- High-resolution computed tomography (HRCT) used for radiological evaluation.
- Measurements included thickness, height, and diameter of the superior semicircular canal (SCC).
Main Results:
- Prevalence of SSCD was 1%, and predehiscence was 14%.
- Autophony was the most frequent symptom (48.3%).
- Significant age-related differences in SCC dimensions were observed, with specific findings in patients aged 54-72 years.
- Bone thickness over the SCC demonstrated high sensitivity and specificity for differentiating symptomatic cases.
Conclusions:
- SSCD and predehiscence prevalence vary; the condition is likely acquired.
- Autophony is the predominant symptom.
- SCC bone thickness is the most reliable measurement for distinguishing between positive and negative symptoms.
