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High prevalence of inner-ear and/or internal auditory canal malformations in children with unilateral sensorineural

Sawako Masuda1, Satoko Usui, Tatsuo Matsunaga

  • 1Department of Otorhinolaryngology, Institute for Clinical Research, National Mie Hospital, Tsu, Mie, Japan. masudas@mie-m.hosp.go.jp

International Journal of Pediatric Otorhinolaryngology
|December 4, 2012
PubMed

Insights

Congenital hearing loss in children often involves inner ear malformations, particularly in infants. Early temporal bone CT scans are crucial for diagnosing unilateral sensorineural hearing loss (USNHL) and guiding management.

Area of Science:

  • Otolaryngology
  • Pediatric Radiology
  • Medical Genetics

Background:

  • Congenital hearing loss diagnosis is evolving with advanced radiological and genetic tools.
  • Unilateral sensorineural hearing loss (USNHL) in children requires thorough investigation for underlying causes.

Purpose of the Study:

  • To determine the prevalence of inner ear and/or internal auditory canal malformations in children diagnosed with USNHL.
  • To inform better management strategies, genetic counseling, and lifestyle advice for affected children.

Main Methods:

  • A retrospective analysis of 69 pediatric patients (0-15 years) with USNHL.
  • Review of patient charts and temporal bone computed tomography (CT) findings.
  • Genetic testing was performed in two cases.

Main Results:

  • A high prevalence of inner ear and/or internal auditory canal malformations was observed in 66.7% of patients.
  • Malformations were significantly more common in infants (<1 year) at 84.6% compared to older children (55.8%).
  • Cochlear nerve canal stenosis (46.4%) and internal auditory canal malformations (31.8%) were the most frequent findings.

Conclusions:

  • High-resolution temporal bone CT reveals a high prevalence of malformations in children with USNHL.
  • Radiological and genetic evaluations are vital for understanding hearing loss pathogenesis and management.
  • Early temporal bone CT screening and consideration of SLC26A4 mutations in specific cases are recommended.
Abstract

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