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Related Experiment Video

Updated: May 6, 2026

Surgical Induction of Endolymphatic Hydrops by Obliteration of the Endolymphatic Duct
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Isolated Enlarged Endolymphatic Sac Causing Sensorineural Hearing Loss: A Case Report.

Anne-Marie Daou1, Jad Hosri1, Randa Barazi1

  • 1Department of Otolaryngology-Head and Neck Surgery, American University of Beirut Medical Center, Lebanon.

Ear, Nose, & Throat Journal
|August 25, 2025
PubMed
Summary

An enlarged endolymphatic sac anomaly, a rare condition, was incidentally found in a 10-year-old girl. Imaging revealed a cystic lesion, and she had low-frequency sensorineural hearing loss.

Keywords:
endolymphatic sachearing lossotologypediatric otolaryngologysensorineural

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Area of Science:

  • Pediatric Otolaryngology
  • Neuroradiology
  • Audiology

Background:

  • Enlarged endolymphatic sac anomaly is a rare condition.
  • Incidental findings on neuroimaging require thorough evaluation.
  • Pediatric posterior fossa lesions can present with varied symptoms.

Purpose of the Study:

  • To report a rare case of enlarged endolymphatic sac anomaly in a child.
  • To highlight the diagnostic process and imaging findings.
  • To discuss the clinical implications of this rare pathology.

Main Methods:

  • Case presentation of a 10-year-old girl with retro-auricular pain.
  • Computed tomography (CT) scan for incidental posterior fossa finding.
  • Magnetic resonance imaging (MRI) and comprehensive audiometry for detailed evaluation.

Main Results:

  • A 20 mm dilatation in the left posterior fossa was incidentally detected on CT.
  • MRI revealed a cystic lesion consistent with enlarged endolymphatic sac anomaly.
  • Audiometry demonstrated left-sided, low-frequency sensorineural hearing loss.

Conclusions:

  • Enlarged endolymphatic sac anomaly is an exceptionally rare diagnosis.
  • Multimodality imaging is crucial for characterizing such lesions.
  • Early detection and diagnosis are important for managing associated hearing deficits.