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The large vestibular aqueduct: a new definition based on audiologic and computed tomography correlation
Mark Boston1, Mark Halsted, Jareen Meinzen-Derr
1Ear and Hearing Center, Cincinnati Children's Hospital Medical Center and the University of Cincinnati College of Medicine, Cincinnati, OH 45229, USA.
Summary
A large vestibular aqueduct (LVA) is common in children with sensorineural hearing loss (SNHL). Larger aqueduct size correlates with a higher risk of progressive hearing loss, offering diagnostic and prognostic insights.
Area of Science:
- Otolaryngology
- Pediatric audiology
- Radiology
Background:
- Sensorineural hearing loss (SNHL) in children is a significant concern.
- The vestibular aqueduct's role in SNHL is not fully understood.
- Previous reports suggest a lower prevalence of large vestibular aqueduct (LVA) in SNHL patients.
Purpose of the Study:
- To determine the prevalence of LVA in children diagnosed with SNHL.
- To investigate the clinical significance and prognostic value of LVA in pediatric SNHL.
- To establish a relationship between vestibular aqueduct (VA) size and the progression of SNHL.
Main Methods:
- Retrospective review of a pediatric SNHL database.
- Evaluation of radiographic and audiometric data from 107 children with SNHL.
- Comparison of VA dimensions between children with and without SNHL.
Main Results:
- 32% of children with SNHL exhibited an LVA (larger than 95th percentile of controls).
- Progressive SNHL was more frequent in ears with an LVA.
- A statistically significant increased risk of progressive SNHL was observed with increasing VA size.
Conclusions:
- An LVA is defined by specific measurements (>or=2 mm at operculum and/or >or=1 mm at midpoint).
- LVA is more prevalent in pediatric SNHL than previously reported.
- A linear association exists between VA width and the progression of SNHL, providing diagnostic and prognostic information.
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