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Sensorineural hearing loss caused by a high jugular bulb.
1Department of Otolaryngology, Tokyo Medical and Dental University, Tokyo, Japan. atsun.oto@med.tmd.ac.jp
The Journal of Laryngology and Otology
|January 6, 2001
Summary
A high jugular bulb can cause sensorineural hearing loss. Neck compression may worsen hearing by impacting the jugular bulb and inner ear, suggesting this as a diagnostic method.
Area of Science:
- Otolaryngology
- Neurology
- Radiology
Background:
- Sensorineural hearing loss (SNHL) can have various etiologies.
- Vascular anomalies, such as high-riding jugular bulbs, are less common causes of auditory and vestibular symptoms.
- Diagnostic evaluation for SNHL typically includes audiological testing and imaging.
Observation:
- A 15-year-old female presented with SNHL and intermittent dizziness, exacerbated by neck compression.
- Audiometry revealed temporary worsening of low-frequency bone conduction during neck compression.
- A large jugular bulb encroaching on the right round window was noted on otoscopy and confirmed by computed tomography (CT).
Findings:
- CT imaging demonstrated the jugular bulb obliterating the right round window niche.
- The temporary deterioration of bone conduction during neck compression was attributed to the jugular bulb's protrusion into the inner ear via the round window.
- This case highlights a potential mechanism for SNHL secondary to jugular bulb abnormalities.
Implications:
- Jugular bulb abnormalities should be considered in the differential diagnosis of SNHL, particularly when symptoms are positional or exacerbated by maneuvers like neck compression.
- Neck compression can serve as a provocative test to unmask or evaluate inner ear disorders related to vascular structures.
- Further investigation into the relationship between vascular variations and auditory/vestibular dysfunction is warranted.