Fig. 1. Prevalence of esophagography findings. (A) Esophageal dilation (grades I to III) in straight, sigmoid, and advanced sigmoid esophagus. The rates of sigmoid esophagus (n = 684; 18.6%) and advanced sigmoid esophagus (n = 200; 5.4%) are lower than the rate of straight esophagus (n = 2796; 76.0%). More than half the patients with straight-type achalasia had dilated esophagus (n = 1429; 51.1%). (B) Type of achalasia (straight, sigmoid, and advanced sigmoid) in patients with grades I to III esophageal dilation. Grade II dilation is more common than grade I dilation (n = 1945; 52.9% vs n = 1550; 42.1%), and grade III dilation is rare (n = 185, 5.0%). Sigmoid-type achalasia is more common than straight-type achalasia in patients with grade III esophageal dilation (n = 112; 60.5% vs n = 73; 39.5%).
© J Neurogastroenterol Motil
