Makazu, MakomoMaeda, ShinKobayashi, RyosukeOzeki, YuichiroIkeda, RyosukeSato, ChikoHirasawa, KingoNishio, MasafumiFukuchi, TakehideSawada, AtsushiBackground Endoscopic resection is recommended for non-ampullary duodenal neuroendocrine tumors (NAD-NETs) ≤10 mm in diameter and confined to the submucosal layer, without lymph node or distant metastasis. However, the efficacy and safety of endoscopic submucosal dissection (ESD) for NAD-NET remains unclear. The aim of this study was to assess the short-term efficacy and safety and the long-term outcomes of ESD for NAD-NET. Methods Eight patients with 8 NAD-NETs who underwent ESD between 2015 and 2018 were included. The indications for ESD were: i) tumor ≤10 mm in diameter; ii) NET G1; iii) confined to the submucosal layer; and iv) without lymph node or distant metastasis. We retrospectively assessed the short- and long-term outcomes and safety. Results The median patient age was 69 (48-76) years. All tumors were located in the duodenal bulb and showed 0-Is morphology. The median size was 6.4 (3-9.3) mm. The rates of en bloc resection, histologically free horizontal and vertical margins, and curative resection were 100%, 88%, and 88%, respectively. Intraoperative and postoperative perforation each occurred in 13% of patients, all of whom were treated conservatively and avoided emergent surgery. Delayed bleeding was not observed. No local, lymph node or distant recurrence was observed during a median follow-up period of 34 (18.5-62.5) months. Conclusions The rates of en bloc and curative resection, and histologically free margins were sufficiently high. Although intraoperative and postoperative perforations occurred, emergency surgery was not needed. The results show that ESD is an efficacious and safe treatment for NAD-NET. Keywords Duodenum, endoscopic resection, endoscopic submucosal dissection, neuroendocrine tumor, treatment outcome Ann Gastroenterol 2020; 33 (3): 265-271text/htmlapplication/pdfhttp://www.annalsgastro.gr/index.php/annalsgastro/article/view/4976engHellenic Society of GastroenterologyCopyright (c) 2020 Annals of Gastroenterology1792-74631108-7471Annals of Gastroenterology; Volume 33, No 3 (2020); 265Short- and long-term outcomes of endoscopic submucosal dissection for non-ampullary duodenal neuroendocrine tumorsinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersion2020-05-08Δημοσίευση σε περιοδικόPublication in journalΓαστροεντερολογίαGastroenterologyisi -Gastroenterology & Hepatology covers resources on the anatomy, physiology, biochemistry, and pathology of the digestive system. This category includes specific resources on the prognosis and treatment of digestive diseases; stomach ulcers; metabolic, genetic, infectious and chemically induced diseases of the liver; colitis; diseases of the pancreas and diseases of the rectum.Επιστημονικό άρθροScientific articleΕλληνική Γαστροεντερολογική ΕταιρίαGreek Aggregator OpenArchives.gr | National Documentation Centre (EKT)other