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The POEM procedure is performed by endoscope. There is no incision in the chest or abdomen. The endoscope (a thin flexible tube) is passed through the patient's mouth into the esophagus. Using a blade ...

I had three options for treatment: pneumatic dilation, where the esophageal sphincter is inflated by a balloon; a Heller myotomy, where the esophageal muscles are cut into; or a peroral endoscopic ...