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Gustatory Function in Patients With Cerebellopontine Angle Masses.

Dimitrios Daskalou, Julien W Hsieh, Marianne Hugentobler1

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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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Many patients with cerebellopontine angle (CPA) masses have reduced taste function on the affected side. Most patients do not report this taste impairment, highlighting the need for preoperative assessment.

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Area of Science:

  • Neurology
  • Otolaryngology
  • Neurosurgery

Background:

  • Cerebellopontine angle (CPA) masses can affect cranial nerves, including those involved in taste.
  • Subjective and objective taste dysfunction are potential sequelae of CPA masses.

Purpose of the Study:

  • To investigate the impact of untreated CPA masses on subjective and measured taste function.
  • To determine the prevalence of taste impairment in patients with CPA masses.

Main Methods:

  • Retrospective cross-sectional study of 135 adult patients with untreated CPA masses.
  • Gustatory function was psychophysically measured using Taste Strips on both sides of the tongue.
  • Subjective taste complaints were assessed via questionnaire; hemi-ageusia defined by asymmetry.

Main Results:

  • Overall measured taste function was significantly lower on the affected side (9.8 ± 3.3) versus the healthy side (11 ± 2.9; p < 0.0001).
  • 13.3% of patients had hemi-ageusia, but only 30.8% of these reported subjective taste dysfunction.
  • Vestibular schwannomas (VS) classified as Koos IV showed the lowest taste scores on the affected side (7.5 ± 3.7).

Conclusions:

  • A measurable decrease in ipsilateral gustatory function is common in patients with CPA masses before treatment.
  • The majority of patients do not perceive their taste impairment, suggesting a need for preoperative assessment.
  • Preoperative taste assessment may be important for medicolegal reasons to manage expectations and avoid postoperative claims.