Journal
JOURNAL OF LARYNGOLOGY AND OTOLOGY
Volume 130, Issue 5, Pages 453-461Publisher
CAMBRIDGE UNIV PRESS
DOI: 10.1017/S0022215116000761
Keywords
Somatosensory Evoked Potentials; Radiotherapy; Chemotherapy; Nasopharyngeal Carcinoma; Olfactory Perception
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Objective: Olfactory dysfunction is a possible side effect of chemo-radiotherapy performed in patients affected by nasopharyngeal carcinoma. Self-rating measurements and olfactory event-related potentials were used and compared in order to evaluate the impact of this treatment on the olfactory system. Methods: Nine patients underwent subjective evaluation of olfactory function (using visual analogue scales for olfactory symptoms and quality of life, and a six-item Hyposmia Rating Scale), and a quantitative and objective measurement (olfactory event-related potentials). Results: Spearman's rank correlation analyses highlighted significant relationships between the clinical scales and olfactory event-related potentials. Inter-group analyses showed significant differences in the latency and in the amplitude of olfactory event-related potentials between patients and controls. Conclusion: Taking into account the small sample size and the lack of pre-treatment assessment, olfactory even-trelated potentials seemed to allow a more objective diagnosis of unilateral and bilateral olfactory loss. Moreover, olfactory event-related potentials and subjective scales results were concordant.
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