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Comparison Between the Veillon and the Symons-Fanning CT Classification Systems for Otosclerosis.

João Viana Pinto, Ana Isabel Almeida1, António Andrade

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Otology & Neurotology : Official Publication of the American Otological Society, American Neurotology Society [And] European Academy of Otology and Neurotology
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Summary

The Symons-Fanning classification (SFC) better predicts stapes surgery outcomes for bone conduction hearing, while the Veillon classification (VC) is more useful for air conduction. Both classifications correlate with hearing success rates.

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Area of Science:

  • Otolaryngology
  • Audiology
  • Radiology

Background:

  • Otosclerosis surgery outcomes are influenced by various factors.
  • Radiological staging systems aim to classify disease severity and predict surgical results.
  • The Veillon classification (VC) and Symons-Fanning classification (SFC) are used to stage otosclerosis.

Purpose of the Study:

  • To analyze the correlation between stapes surgery outcomes and preoperative/postoperative audiometric results.
  • To evaluate the utility of the Veillon classification (VC) and Symons-Fanning classification (SFC) in predicting these outcomes.

Main Methods:

  • Retrospective observational study at a single tertiary hospital.
  • Included adult patients undergoing stapes surgery for otosclerosis (January 2017 - December 2022).
  • Analyzed preoperative/postoperative pure-tone audiometry, surgical success (air-bone gap closure, AC thresholds ≤30 dB), and sensorineural hearing loss in relation to VC and SFC.

Main Results:

  • The Symons-Fanning classification (SFC) correlated with preoperative bone conduction (BC) and air conduction (AC) thresholds, and postoperative BC thresholds.
  • The Veillon classification (VC) correlated with postoperative AC thresholds.
  • Both VC and SFC were associated with a decreased rate of postoperative AC thresholds ≤30 dB with higher radiological stages.

Conclusions:

  • The SFC appears more valuable for predicting preoperative BC and AC, and postoperative BC.
  • The VC is more useful for predicting postoperative AC.
  • Both classifications demonstrated similar associations with achieving postoperative AC thresholds ≤30 dB.