• Christopher Moritz Schad, Nadia Wildner, and Felix Gundling.
• Klinik für Gastroenterologie, Gastroenterologische Tumortherapie und Diabetologie, Gemeinschaftsklinikum Mittelrhein, Kemperhof, Koblenz.
• Dtsch. Med. Wochenschr. 2021 Apr 1; 146 (9): 608-612.

AbstractSince the first publication of peroral endoscopic myotomy (POEM) by Haruhiro Inoue et al. in 2008 in Japan, various novel endoscopic procedures have been established, which are performed after iatrogenic creation of a submucosal tunnel as a "new space" 1. Through the artificially formed access in the tela submucosa, interventions in the muscular layer of the esophagus and stomach can be performed while carefully sparing the mucosal layer 2. These include, peroral myotomy of the esophageal muscle layer in patients with achalasia (POEM) and myotomy of the pylorus in patients with gastroparesis (antropyloromyotomy, G-POEM). Further indications include splitting of Zenker diverticulum in POEM technique ("Z-POEM") as well as the removal of subepithelial tumors (STER: submucosal tunneling, endoscopic resection). The long-term therapeutic success (with > 80 % response) of these innovative procedures has now been proven by controlled studies, especially in achalasia 2 3 4 5 6.Thieme. All rights reserved.

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