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KMID : 1024320180080020067
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Journal of the Korean Dysphagia Society
2018 Volume.8 No. 2 p.67 ~ p.75
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Video Fluoroscopic Swallowing Study of Radiation Induced Dysphagia in Head and Neck Cancer
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Ko Sung-Hwa
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Abstract
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Dysphagia is a symptom of head and neck cancer itself and a significant complication of its treatments. Radiation therapy also causes dysphagia due to radiation toxicity. Therefore, it is necessary to evaluate patients who complain of dysphagia after radiation therapy. A video fluoroscopic swallowing study (VFSS) is an imaging tool that can diagnose dysphagia objectively from the oral to the esophagus phase. This tool is also used to evaluate to radiation-induced dysphagia. The abnormal findings in each swallowing phase are diverse. Interpreting each abnormal finding in relation to periodic complications caused by radiation toxicity is very important. A delayed pharyngeal transit time is the most characteristic abnormal finding of VFSS due to fibrosis, which is a chronic complication. To accurately assess the radiation-induced dysphagia, an evaluation of dysphagia prior to radiation therapy in head and neck cancer patients should be preceded. A multidisciplinary approach for evaluating dysphagia is needed throughout the entire period of head and neck cancer treatment.
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KEYWORD
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Dysphagia, Head and neck cancer, Radiation, Video fluoroscopic swallowing study
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