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Abstract
Dysphagia indicates an abnormality of pharyngeal or esophageal function due either to a motor abnormality or to organic narrowing of the lumen. As therapy differs for these two types of disorders, the physician's first responsibility is to establish the nature of the abnormality producing dysphagia. If the prognosis of cancer of the esophagus is to be improved, careful attention must be given to early symptoms of dysphagia.