title: [OTSC-assisted resection of a duodenal neuroendocrine tumor: a case report].
abstract: The over the scope clip (OTSC) is mainly used for closure of gastrointestinal endoluminal defects and treatment of gastrointestinal bleeding. Its use for resection of subepithelial tumors or full-thickness resection is still under investigation. Duodenal neuroendocrine tumors (NET) are rare neoplasms. Endoscopic resection is appropriate up to a size of 20  mm, however positive deep margins are a frequent challenge in these subepithelial tumors. We report on a 60-year-old male patient who had undergone endoscopic mucosal resection with R1 deep margins of a NET (G1) in the duodenal bulb. To avoid local surgical resection in this multimorbid patient, we performed OTSC-assisted deep resection. Complete resection (R0) was achieved, and no complications occurred. Our report suggests that OTSC-assisted resection of subepithelial tumors is a possible and safe option, especially for patient's and in locations with a high perioperative risk.
authors.affiliation: Innere Medizin 1, Universitätsklinikum Tübingen.
authors.forename: U
authors.initials: U
authors.lastname: Schempf
authors.affiliation: Allgemeine, Viszeral- und Transplantationschirurgie, Universitätsklinikum Tübingen.
authors.forename: T
authors.initials: T
authors.lastname: Kratt
authors.affiliation: Innere Medizin 1, Universitätsklinikum Tübingen.
authors.forename: M
authors.initials: M
authors.lastname: Hoetker
authors.affiliation: Allgemeine, Viszeral- und Transplantationschirurgie, Universitätsklinikum Tübingen.
authors.forename: D
authors.initials: D
authors.lastname: Stüker
authors.affiliation: Innere Medizin 1, Universitätsklinikum Tübingen.
authors.forename: R R
authors.initials: RR
authors.lastname: Plentz
authors.affiliation: Innere Medizin 1, Universitätsklinikum Tübingen.
authors.forename: N P
authors.initials: NP
authors.lastname: Malek
authors.affiliation: Innere Medizin 1, Universitätsklinikum Tübingen.
authors.forename: M
authors.initials: M
authors.lastname: Goetz
mesh_terms: D000368:Aged; D004379:Duodenal Neoplasms / Q000473:pathology* / Q000601:surgery*; D016099:Endoscopy, Gastrointestinal / Q000379:methods*; D006801:Humans; D008297:Male; D018358:Neuroendocrine Tumors / Q000473:pathology* / Q000601:surgery*; D016896:Treatment Outcome