Assessing esophageal dysphagia.

Dysphagia, or difficulty swallowing, is a common problem. Although most cases are attributable to benign disease processes, dysphagia is also a key symptom in several malignancies, making it an important symptom to evaluate. The differential diagnosis of dysphagia requires an understanding of deglutition, in particular the oropharyngeal versus esophageal stages. Stroke is the leading cause of oropharyngeal dysphagia, which is common in older adults and frequently presents as part of a broader complex of clinical manifestations. In esophageal dysphagia, difficulty swallowing is often the main complaint and is caused by localized neuromuscular disorders or obstructive lesions.