Usefulness and safety of endoscopic treatment for nonampullary duodenal adenoma and adenocarcinoma

Background and Aim: Safety and efficacy data on endoscopic treatment of duodenal neoplasm are limited. We suggest the technical feasibility of endoscopic procedures by evaluating the results of endoscopic treatment for nonampullary duodenal adenoma and adenocarcinoma. Methods: Forty-five patients who underwent endoscopic treatment for nonampullary duodenal adenoma with or without malignant transformation between September 2003 and March 2012 were included. Endoscopic polypectomy of duodenal polyp (DPP), duodenal endoscopic mucosal resection (DEMR), and duodenal endoscopic submucosal dissection (DESD) were selected as endoscopic treatments for each lesion. Results: Mean lesion size was 9.1 mm, and most lesions were located in the second portion of the duodenum. There were 40 adenomas and five early-stage adenocarcinomas arising from adenomas. Of the 45 duodenal neoplasms, five patients were treated with DPP, 33 with DEMR, and seven patients with a large duodenal lesion underwent DESD. Minimum of 1-year follow-up endoscopies were performed in 42 patients, excepting three patients treated after October 2011. Median follow-up was 24.8 months. Of the 45 patients, en bloc resection was performed in 43 (95.6%). A complete resection was performed in 41 patients (91.1%). No significant bleeding events occurred. Perforations occurred in three patients who underwent DESD. All perforations were noticed during the procedures and completely closed by endoscopic clipping. There was one recurrence at 6 months after DPP. Conclusion: Endoscopic treatment is minimally invasive management for duodenal adenomas and superficial adenocarcinomas. It would be helpful for medical doctors in the management of duodenal neoplasms.