title: Chalasia of the esophagus.
mesh_terms: D004106:Dilatation; D004931:Esophageal Achalasia / Q000150:complications*; D005764:Gastroesophageal Reflux / Q000150:complications; D005769:Gastrointestinal Motility; D006801:Humans; D007223:Infant; D014839:Vomiting