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Temporal bone computed tomography findings in bilateral sensorineural hearing loss
D E Bamiou1, P Phelps, T Sirimanna
1Audiology Department, Great Ormond Street Hospital for Sick Children, London WC1N 3JH, UK. doriseva@ndirect.co.uk
Archives of Disease in Childhood
|February 24, 2000
Summary
Computed tomography (CT) of the temporal bones is valuable for investigating sensorineural hearing loss (SNHL) in children. Abnormalities are more common in those with profound, progressive SNHL, or craniofacial issues.
Area of Science:
- Pediatric audiology
- Radiology
- Otolaryngology
Background:
- Sensorineural hearing loss (SNHL) is a common condition in children.
- Identifying the underlying causes of SNHL is crucial for effective management.
- Computed tomography (CT) is a common imaging modality used in the investigation of SNHL.
Purpose of the Study:
- To evaluate the diagnostic yield of temporal bone CT scans in children with SNHL.
- To identify clinical and demographic factors associated with abnormal CT findings in pediatric SNHL.
Main Methods:
- Retrospective analysis of 116 children with bilateral SNHL.
- Data collected included CT results, hearing loss parameters, medical history, and clinical examination.
- Statistical analysis to identify factors associated with abnormal CT scans.
Main Results:
- 28.4% of CT scans were abnormal.
- Profound or progressive SNHL and craniofacial abnormalities were associated with abnormal CT findings (25 cases).
- Dilated vestibular aqueduct correlated with progressive SNHL.
Conclusions:
- Radiological investigation of the temporal bones is recommended for all children with SNHL.
- CT is particularly useful in children with craniofacial abnormalities or profound/progressive hearing loss.
- CT and MRI may both be required for cochlear implant candidates.