Department of Gastroenterology;
Sana Klinikum Lichtenberg;
Berlin 13065;
Germany;
Department of Pathology;
Sana Klinikum Lichtenberg;
Berlin 13065;
Germany;
Endoscopic full-thickness resection; Full-thickness resection device; Duodenum; Duodenal adenoma; Endoscopy; Case report;