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Delayed endolymphatic hydrops as a clinical entity
1Gunma University School of Medicine, Department of Otolaryngology, Maebashi, Japan. ty-kamei@po.kannet.ne.jp
The International Tinnitus Journal
|March 1, 2005
Summary
Delayed endolymphatic hydrops (DEH) is a distinct inner ear condition following profound hearing loss, potentially developing years later. Treatment options exist for the ipsilateral form, but not the contralateral type.
Area of Science:
- Otolaryngology
- Neurology
- Audiology
Background:
- Delayed endolymphatic hydrops (DEH) is a clinical entity distinct from Ménière's disease.
- It occurs in patients with prior longstanding unilateral profound inner-ear hearing loss.
- DEH is hypothesized to result from delayed atrophy or obliteration of the endolymphatic resorptive system.
Purpose of the Study:
- To differentiate Delayed endolymphatic hydrops (DEH) from Ménière's disease.
- To describe the characteristics, causes, and types of DEH.
- To outline treatment outcomes for DEH.
Main Methods:
- Clinical case review and analysis.
- Review of patient histories detailing hearing loss and subsequent vestibular symptoms.
- Comparison of clinical presentation and outcomes between DEH and Ménière's disease.
Main Results:
- DEH onset can occur 1 to 74 years after initial hearing loss.
- Common preceding causes include juvenile deafness, labyrinthitis, and trauma.
- Two types exist: ipsilateral (more common) and contralateral (more common in older patients).
Conclusions:
- Delayed endolymphatic hydrops (DEH) is a unique condition following profound hearing loss.
- Ipsilateral DEH is surgically treatable via labyrinthectomy and vestibular neurectomy.
- Contralateral DEH lacks specific surgical treatment options.