The Journey from Endoscopic Submucosal Dissection to Third Space Endoscopy East versus West: Comparisons and Implications in Adaptation to Practice Building the Toolbox of Devices to Optimize a Practice in Submucosal Endoscopy Understanding the Principles of Electrosurgery for Endoscopic Surgery and Third Space Endoscopy Training in Endoscopic Submucosal Dissection in the United States: The Current Paradigm Endoscopic Submucosal Dissection in the Esophagus: Indications, Techniques, and Outcomes Endoscopic Submucosal Dissection in the Stomach and Duodenum: Techniques, Indications, and Outcomes Endoscopic Submucosal Dissection in the Colon and Rectum: Indications, Techniques, and Outcomes Indications and Outcomes of Per Oral Endoscopic Myotomy from Mouth to Anus Peroral Endoscopic Myotomy Technique, from Mouth to Anus Submucosal Tunneling Techniques for Tumor Resection Nontunneling Full Thickness Techniques for Neoplasia Endoscopic Closure: Tools and Techniques Management of Adverse Events of Submucosal Endoscopy A Look into the Future of Endoscopic Submucosal Dissection and Third Space Endoscopy: The Role for Robotics and Other Innovation