Dysphagia is a common symptom with various causes, and technological advancements have improved efforts directed toward finding the cause of dysphagia. High-resolution manometry based on spatiotemporal plots has been used clinically since the 2000s, and version 4.0 of the high-resolution manometry-based Chicago classification with a revised protocol was suggested in 2021. Development of the functional lumen imaging probe (FLIP), used in conjunction with manometry, has broadened our understanding of esophageal motility disorders by providing measures of passive outer distensibility of the esophageal body and sphincter. Eosinophilic esophagitis is another esophageal disease with an increasing incidence in Korea. Greater understanding of the diagnosis and treatment of these diseases is needed.

Keywords: Dysphagia, Achalasia, Eosinophilic esophagitis