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Endoscopic Cholesteatoma Surgery
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Round Window Reinforcement for Semicircular Canal Dehiscence Syndrome.

Holger Sudhoff1,2

  • 1Department of Otorhinolaryngology, Head and Neck Surgery, Bielefeld ENT Institute (BENTI), Kopfzentrum Bielefeld Medical Faculty OWL, Bielefeld, Germany.

The Journal of International Advanced Otology
|June 30, 2026
PubMed
Summary

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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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Round window reinforcement (RWR) offers a safe and effective treatment for semicircular canal dehiscence syndrome (SCDS). This minimally invasive surgery improved auditory symptoms in most patients, with no complications reported.

Area of Science:

  • Otolaryngology
  • Neurosurgery
  • Audiology

Background:

  • Semicircular canal dehiscence syndrome (SCDS) presents with auditory and vestibular symptoms.
  • Surgical intervention is often necessary for symptom management.
  • Minimally invasive techniques are sought for SCDS treatment.

Purpose of the Study:

  • To evaluate the clinical outcomes of round window reinforcement (RWR) for SCDS.
  • To assess the safety profile of transcanal RWR in SCDS patients.
  • To determine RWR's efficacy in improving auditory and vestibular symptoms.

Main Methods:

  • Retrospective case series of 7 SCDS patients undergoing transcanal RWR.
  • Assessment of pre- and post-operative auditory, vestibular, and Dizziness Handicap Inventory (DHI) scores.
Keywords:
Auditory symptomsendolymphatic hydropsround window reinforcementsuperior semicircular canal dehiscencethird window syndrometranscanal surgeryvertigo

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  • Inclusion based on Bárány Society diagnostic standards; monitoring of endolymphatic hydrops in 2 patients.

    • Main Results:

    • 71.4% of patients experienced auditory symptom improvement, including tinnitus and hyperacusis relief.
    • Vertigo improved in 50% of symptomatic cases; no decline in DHI scores or hearing.
    • No intra- or postoperative complications were observed; auditory improvement noted in hydrops cases.

    Conclusions:

    • Round window reinforcement (RWR) is a safe and effective option for select SCDS patients.
    • RWR is particularly beneficial for patients with predominant auditory symptoms.
    • Further prospective studies are required to establish RWR's role in managing third window syndromes.