IntroductionAchalasia (AC) is a rare esophageal motility disorder characterized by aperistalsis of the esophageal body and impaired lower esophageal sphincter (LES) relaxation. Clinical manifestations include dysphagia, regurgitation, chest pain, weight loss, etc. Current treatment modalities of achalasia include pharmacologic agents, endoscopic methods (such as intrasphincteric injection of botulinum toxin, pneumatic dilatation, and endoscopic retrievable stent placement), and surgery. 1) Pharmacological management such as calcium antagonists or nitrates has little effect. 2) Though endoscopic methods can relieve the symptoms and improve the life quality of AC patients, the long-term efficacy is disappointing. 3) Laparoscopic Heller Myotomy (LHM) is a standard surgical method for treating achalasia, and has demonstrated good long-term efficacy and life quality improvement. 4,5) However, this procedure is more invasive with longer hospital stay and greater cost compared with endoscopic methods. 6,7) Peroral endoscopic myotomy (POEM) is a novel treatment for achalasia, and has shown exciting results in limited