Noncongenital hereditary hearing loss in children. Prospective documentation
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1New York (NY) League for the Hard of Hearing, University School of Medicine, NY.
Insights
Younger siblings of children with hereditary hearing loss need regular audiologic follow-ups. Early identification and intervention are crucial for progressive sensorineural hearing loss, even with initially normal hearing tests.
Area of Science:
- Otolaryngology
- Genetics
- Audiology
Background:
- Sensorineural hearing loss (SNHL) can have hereditary causes.
- Early identification of hearing loss is critical for intervention.
- Siblings of affected children are at increased risk.
Observation:
- Younger siblings of children with SNHL underwent regular audiologic examinations.
- Seven siblings across unrelated families developed progressive SNHL.
- Initial audiograms in these siblings showed normal hearing levels for their age.
Findings:
- Progressive SNHL was identified in siblings despite normal early audiograms.
- Continued audiologic testing facilitated early detection.
- Recessive SNHL may manifest later in childhood with no prior family history.
Implications:
- Regular otolaryngologic and audiologic follow-up is recommended for siblings of children with SNHL.
- This monitoring is essential unless the cause in the older child is definitively non-genetic.
- Early intervention can significantly improve outcomes for children with progressive hearing loss.
Abstract:
Younger siblings of children with sensorineural hearing loss of possible hereditary cause underwent interval audiologic examination. Seven siblings (in unrelated families) were found to have progressive sensorineural hearing loss despite early audiograms documenting normal hearing levels for age. Continued testing of these children allowed for early identification and intervention. We advocate regular otolaryngologic and audiologic follow-up even after normal audiologic assessments are made for younger siblings of children with documented sensorineural hearing loss, unless a definite nongenetic origin of the hearing loss in the older child is known. Recessive sensorineural hearing loss with onset in infancy or childhood may present with no antecedent family history and with normal behavioral audiograms early in life.