Fig. 1. Endoscopy showing (A) a dilated esophagus with retained food and (B) tightness, with some resistance at the gastroesophageal junction (GEJ). Barium swallow, showing (C) a “bird-beak” image at the GEJ, with (D) a dilated esophageal body and an air?fluid level.

Gastrointestinal Intervention 2014;3:19~23 https://doi.org/10.1016/j.gii.2014.03.001

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