Efficacy of peroral endoscopic myotomy for esophageal motility disorders after gastric surgery: Japan Achalasia Multicenter Study.

Patients with gastric surgery often present severe disease manifestations; the surgical indication is mainly gastric cancer. HRM findings can be similarly used for diagnosis in patients with and without gastric surgery. POEM maintains safety and efficacy with acceptable RE and symptomatic GERD rates. To prevent RE, extended myotomy should be avoided.