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Histological Study of Temporal Bones in a Patient with Poor Speech Discrimination Sachiko Takegoshi 1,2 1Department of Otolaryngology, Teikyo University School of Medicine pp.885-890
Published Date 1998/12/20
DOI https://doi.org/10.11477/mf.1411901896
  • Abstract
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We report the temporal bone histopathology in a 63-year-old male with a moderate sensorineural hearing loss and poor speech discrimination. His hearing acuity was evaluated by pure tone andspeech audiometry 10 days before his death. A histological study on the temporal bones revealed marked loss of the spiral ganglion cells and den-drites in all cochlear turns. The neuronal loss was mostly limited to the afferent nerve fibers, while the efferent nerve fibers were spared. The outer and inner hair cells as well as the stria vascularis appeared almost normal. From these temporal bone findings, the sensorineural hearing loss in this patient was diagnosed as neural presbycusis of Schuknecht.


Copyright © 1998, Igaku-Shoin Ltd. All rights reserved.

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電子版ISSN 1882-1316 印刷版ISSN 0914-3491 医学書院

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