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Usher syndrome. A temporal bone report

A van Aarem1, W R Cremers, M J Benraad-van Rens

  • 1Department of Otorhinolaryngology, University Hospital Nijmegen, The Netherlands.

Archives of Otolaryngology--Head & Neck Surgery
|August 1, 1995
PubMed
Summary

This study examined the temporal bones of an 84-year-old man with Usher syndrome. Findings revealed significant degeneration in the cochlea, impacting hearing structures and neurons.

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Area of Science:

  • Otolaryngology
  • Neuropathology
  • Genetics

Background:

  • Usher syndrome is a genetic disorder causing hearing loss and vision impairment.
  • Temporal bone histopathology provides crucial insights into the auditory system's structural changes.

Observation:

  • Microscopic examination of bilateral temporal bones from an 84-year-old male with Usher syndrome.
  • Detailed analysis focused on the cochlea, organ of Corti, cochlear neurons, and spiral ganglia.

Findings:

  • Profound degeneration of the organ of Corti, particularly in the basal turn.
  • Widespread degeneration of cochlear neurons across all cochlear turns.
  • Severe loss of spiral ganglia in both cochleas.
  • Presence of endolymphatic hydrops and a utricular pit malformation in the right cochlea.

Implications:

  • The histopathological findings correlate with the auditory dysfunction seen in Usher syndrome.
  • Understanding these cochlear changes can inform future therapeutic strategies.
  • Comparison with literature data aids in characterizing Usher syndrome's otic manifestations.

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