Journal of Neurogastroenterology and Motility : eISSN 2093-0887 / pISSN 2093-0879

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Fig. 1. When 2 straight lines for the long axes of the lower esophagus are drawn, a single angle (α) will be formed by the crossing straight lines. (A) Achalasia was defined as sigmoid type when the angle was less than 135°. (B) Achalasia was defined as advanced sigmoid type when the angle was defined as less than 90°. We followed the Descriptive Rules for Achalasia of the Esophagus published by the Japan Esophageal Society.
Journal of Neurogastroenterology and Motility 2020;26:67~73 https://doi.org/10.5056/jnm19144
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