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Related Concept Videos

The Cochlea01:13

The Cochlea

The cochlea is a coiled structure in the inner ear that contains hair cells—the sensory receptors of the auditory system. Sound waves are transmitted to the cochlea by small bones attached to the eardrum called the ossicles, which vibrate the oval window that leads to the inner ear. This causes fluid in the chambers of the cochlea to move, vibrating the basilar membrane.
Auditory Pathway01:15

Auditory Pathway

Auditory pathways constitute the complex neural circuits responsible for transmitting and interpreting auditory information from the peripheral auditory system to the brain. Sound waves are initially captured by the outer ear, funneled through the ear canal, and reach the tympanic membrane (eardrum). These vibrations are transmitted via the middle ear's ossicles to the inner ear's cochlea.
When viewed cross-sectionally, the cochlea reveals the scala vestibuli and scala tympani flanking the...
Anatomy of the Ear01:16

Anatomy of the Ear

Auditory sensation, commonly called hearing, involves the transformation of sonic waves into neural impulses facilitated by the structures of the auditory organ. The prominent, flesh-like structure on the side of the head, called the auricle, directs sound waves towards the auditory canal. The auricle is often mislabeled as the pinna, a term more aligned with mobile structures like a feline's external ear. The auditory canal penetrates the cranium via the external auditory meatus of the...

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Inner Ear Test Battery Aligned with Hydrops Magnetic Resonance Imaging to Differentiate Acute-Onset Sensorineural Hearing Loss.

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Related Experiment Video

Updated: Jul 8, 2026

Surgical Treatment of an Endolymphatic Sac Tumor
04:34

Surgical Treatment of an Endolymphatic Sac Tumor

Published on: May 26, 2023

Retrocochlear mass lesion in mid-frequency sudden deafness.

Yi-Tsen Lin1, Yi-Ho Young

  • 1Department of Otolaryngology, National Taiwan University Hospital, Taipei, Taiwan.

Otolaryngology--Head and Neck Surgery : Official Journal of American Academy of Otolaryngology-Head and Neck Surgery
|January 1, 2008
PubMed
Summary

Mid-frequency sudden deafness is a significant indicator of retrocochlear tumors. Approximately one-third of patients with this hearing loss pattern were found to have a tumor, necessitating further investigation.

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Intrathecal Application of a Fluorescent Dye for the Identification of Cerebrospinal Fluid Leaks in Cochlear Malformation
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Intrathecal Application of a Fluorescent Dye for the Identification of Cerebrospinal Fluid Leaks in Cochlear Malformation

Published on: February 29, 2020

Neuro-rehabilitation Approach for Sudden Sensorineural Hearing Loss
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Neuro-rehabilitation Approach for Sudden Sensorineural Hearing Loss

Published on: January 25, 2016

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Last Updated: Jul 8, 2026

Surgical Treatment of an Endolymphatic Sac Tumor
04:34

Surgical Treatment of an Endolymphatic Sac Tumor

Published on: May 26, 2023

Intrathecal Application of a Fluorescent Dye for the Identification of Cerebrospinal Fluid Leaks in Cochlear Malformation
06:59

Intrathecal Application of a Fluorescent Dye for the Identification of Cerebrospinal Fluid Leaks in Cochlear Malformation

Published on: February 29, 2020

Neuro-rehabilitation Approach for Sudden Sensorineural Hearing Loss
09:44

Neuro-rehabilitation Approach for Sudden Sensorineural Hearing Loss

Published on: January 25, 2016

Area of Science:

  • Otolaryngology
  • Neurology
  • Radiology

Background:

  • Sudden deafness is a complex audiological condition.
  • Mid-frequency hearing loss is a specific audiographic pattern within sudden deafness.
  • Understanding the etiology of sudden deafness is crucial for effective management.

Purpose of the Study:

  • To investigate the clinical significance of mid-frequency sudden deafness.
  • To determine the association between mid-frequency sudden deafness and retrocochlear pathologies.
  • To evaluate the necessity of advanced imaging in specific sudden deafness cases.

Main Methods:

  • Retrospective review of 556 sudden deafness cases from 1992 to 2006.
  • Classification of patients based on audiographic configuration (flat, high-frequency, low-frequency, mid-frequency, unclassified).
  • Comprehensive audiovestibular function testing for all participants.

Main Results:

  • 17 out of 556 patients (3%) had a confirmed retrocochlear tumor.
  • The mid-frequency sudden deafness group showed a significantly higher tumor association (33%) compared to other groups.
  • Tumors were identified in mid-frequency (10 cases), high-frequency (4 cases), flat-type (2 cases), and low-frequency (1 case) groups.

Conclusions:

  • A substantial proportion (one-third) of patients presenting with mid-frequency sudden deafness have an underlying retrocochlear mass lesion.
  • Magnetic Resonance (MR) imaging is strongly recommended for all patients diagnosed with mid-frequency sudden deafness.
  • Early detection through appropriate imaging can lead to timely intervention for retrocochlear pathologies.