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The effect of head and neck radiation therapy on voice quality

Twenty‐five patients with squamous cell carcinoma of the head and neck who received radiation therapy as their only form of treatment underwent a computer‐assisted voice analysis before, and 6 months following treatment. Those with early laryngeal tumors had a significant improvement in intelligibility (P = .07), percent of sound voiced (P = .04), and sound perturbation. Those with nonlaryngeal tumors had no change in any measured parameters. Head and neck radiation therapy can significantly improve the voice quality of patients with laryngeal tumors, while having a minimal effect on the voice quality of those with nonlaryngeal tumors.