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Related Experiment Videos

Voice quality after radiation therapy for early glottic cancer.

I Hocevar-Boltezar1, M Zargi, I Honocodeevar-Boltezar

  • 1University Department of Otorhinolaryngology and Cervicofacial Surgery, University of Ljubljana, Zaloska cesta 2, 1525 Ljubljana, Slovenia.

Archives of Otolaryngology--Head & Neck Surgery
|September 9, 2000
PubMed
Summary

Radiation therapy for early glottic cancer significantly impacts voice quality, leading to increased vocal irregularities and patient-reported voice fatigue. Voice therapy may improve outcomes for these patients.

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Area of Science:

  • Otolaryngology
  • Speech Pathology
  • Oncology

Background:

  • Early glottic carcinoma is often treated with radiation therapy.
  • The effects of radiation on voice quality require thorough evaluation.

Purpose of the Study:

  • To assess voice quality in patients treated for early glottic cancer.
  • To compare the voices of irradiated patients with those of healthy individuals.

Main Methods:

  • A case-control study compared 50 irradiated patients with 50 healthy volunteers.
  • Voice samples were analyzed for fundamental frequency, jitter, shimmer, noise-to-harmonic ratio, and voiceless elements.
  • Videostroboscopy and patient-reported voice fatigue were also assessed.

Main Results:

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  • Irradiated patients exhibited significantly higher jitter, shimmer, and degree of voiceless elements.
  • Vocal fold vibration irregularities were observed in most irradiated patients.
  • Voice fatigue was frequently reported by the irradiated group.

Conclusions:

  • Radiation therapy for early glottic cancer leads to diminished voice quality compared to controls.
  • Increased effort in voice production is likely due to vocal fold stiffness.
  • Voice therapy during and after radiation may enhance voice quality.