BACKGROUND: Achalasia is divided into 3 subtypes using the Chicago classification for high-resolution manometry. Aim of this study was to apply this classification to a multicentric French cohort of achalasia and to compare clinical and manometric characteristics between the 3 subtypes. METHODS: Oesophageal symptoms were collected in a retrospective study of patients diagnosed with achalasia on high-resolution manometry. Manometry data were analyzed with oesophago-gastric junction resting and relaxation pressures, and upper oesophageal sphincter resting pressure. Achalasia was classified according to the Chicago classification. RESULTS: From 2007 to August 2011, achalasia was diagnosed in 169 patients, 14% classified as type I, 70% as type II and 16% as type III. Type III patients were older than types I and II (62 years vs. 52, p = 0.03). Ninety five percent of patients complained of dysphagia, 16% of chest pain (no difference between the 3 subtypes); 50% of type I patients presented regurgitations compared to 33% of type II and 22% of type III (p = 0.10). Oesophago-gastric junction and upper oesophageal sphincter pressures did not differ between the 3 groups. CONCLUSION: Type II was the more prevalent subtype of achalasia in this French multicentre cohort. The older age of patients with type III achalasia suggests a different pathophysiology.
BACKGROUND:Achalasia is divided into 3 subtypes using the Chicago classification for high-resolution manometry. Aim of this study was to apply this classification to a multicentric French cohort of achalasia and to compare clinical and manometric characteristics between the 3 subtypes. METHODS: Oesophageal symptoms were collected in a retrospective study of patients diagnosed with achalasia on high-resolution manometry. Manometry data were analyzed with oesophago-gastric junction resting and relaxation pressures, and upper oesophageal sphincter resting pressure. Achalasia was classified according to the Chicago classification. RESULTS: From 2007 to August 2011, achalasia was diagnosed in 169 patients, 14% classified as type I, 70% as type II and 16% as type III. Type III patients were older than types I and II (62 years vs. 52, p = 0.03). Ninety five percent of patients complained of dysphagia, 16% of chest pain (no difference between the 3 subtypes); 50% of type I patients presented regurgitations compared to 33% of type II and 22% of type III (p = 0.10). Oesophago-gastric junction and upper oesophageal sphincter pressures did not differ between the 3 groups. CONCLUSION: Type II was the more prevalent subtype of achalasia in this French multicentre cohort. The older age of patients with type III achalasia suggests a different pathophysiology.
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