Underwater endoscopic mucosal resection for superficial nonampullary duodenal adenomasTRIAL REGISTRATION: Single-center, prospective, cohort study UMIN000018710 at http://www.umin.ac.jp.
submitted 03 March 2017
accepted after revision 21 August 2017
29 September 2017 (eFirst)
Background and study aim Underwater endoscopic mucosal resection (UEMR) was recently developed in a Western country. A prospective cohort study to investigate the effectiveness of UEMR was conducted in patients with small superficial nonampullary duodenal adenomas.
Patients and methods Patients with duodenal adenomas ≤ 20 mm were enrolled. After the duodenal lumen had been filled with physiological saline, UEMR was performed without submucosal injection. Endoclip closure was attempted for all mucosal defects after UEMR. Follow-up endoscopy with biopsy was performed 3 months later. The primary end point was the complete resection rate, defined as neither endoscopic nor histological residue of adenoma at the follow-up endoscopy.
Results 30 patients with 31 lesions were enrolled. The mean (SD) tumor size was 12.0 mm (7.3). The complete resection rate was 97 % (90 % confidence interval, 87 % – 99 %). The en bloc resection rate was 87 %. All mucosal defects were successfully closed by endoclips. No adverse events occurred except for one case of mild aspiration pneumonia.
Conclusions UEMR is efficacious for the treatment of small duodenal adenomas, but further large-scale trials are warranted to confirm these results.
- 1 Seifert E, Schulte F, Stolte M. Adenoma and carcinoma of the duodenum and papilla of Vater: a clinicopathologic study. Am J Gastroenterol 1992; 87: 37-42
- 2 Okada K, Fujisaki J, Kasuga A. et al. Sporadic nonampullary duodenal adenoma in the natural history of duodenal cancer: a study of follow-up surveillance. Am J Gastroenterol 2011; 106: 357-364
- 3 Maruoka D, Arai M, Kishimoto T. et al. Clinical outcomes of endoscopic resection for nonampullary duodenal high-grade dysplasia and intramucosal carcinoma. Endoscopy 2013; 45: 138-141
- 4 Apel D, Jakobs R, Spiethoff A. et al. Follow-up after endoscopic snare resection of duodenal adenomas. Endoscopy 2005; 37: 444-448
- 5 Yamamoto Y, Yoshizawa N, Tomida H. et al. Therapeutic outcomes of endoscopic resection for superficial non-ampullary duodenal tumor. Dig Endosc 2014; 26: 50-56
- 6 Abbass R, Rigaux J, Al-Kawas FH. Nonampullary duodenal polyps: characteristics and endoscopic management. Gastrointest Endosc 2010; 71: 754-759
- 7 Klein A, Nayyar D, Bahin FF. et al. Endoscopic mucosal resection of large and giant lateral spreading lesions of the duodenum: success, adverse events, and long-term outcomes. Gastrointest Endosc 2016; 84: 688-696
- 8 Inoue T, Uedo N, Yamashina T. et al. Delayed perforation: a hazardous complication of endoscopic resection for non-ampullary duodenal neoplasm. Dig Endosc 2014; 26: 220-227
- 9 Hoteya S, Yahagi N, Iizuka T. et al. Endoscopic submucosal dissection for nonampullary large superficial adenocarcinoma/adenoma of the duodenum: feasibility and long-term outcomes. Endosc Int Open 2013; 1: 2-7
- 10 Irino T, Nunobe S, Hiki N. et al. Laparoscopic-endoscopic cooperative surgery for duodenal tumors: a unique procedure that helps ensure the safety of endoscopic submucosal dissection. Endoscopy 2015; 47: 349-351
- 11 Binmoeller KF, Shah JN, Bhat YM. et al. “Underwater” EMR of sporadic laterally spreading nonampullary duodenal adenomas (with video). Gastrointest Endosc 2013; 78: 496-502
- 12 Uedo N, Nemeth A, Johansson GW. et al. Underwater endoscopic mucosal resection of large colorectal lesions. Endoscopy 2015; 47: 172-174
- 13 Yamasaki Y, Takeuchi Y, Uedo N. et al. Line-assisted complete closure of duodenal mucosal defects after underwater endoscopic mucosal resection. Endoscopy 2016; 49: E37-38
- 14 Dixon MF. Gastrointestinal epithelial neoplasia: Vienna revisited. Gut 2002; 51: 130-131
- 15 Hoteya S, Kaise M, Iizuka T. et al. Delayed bleeding after endoscopic submucosal dissection for non-ampullary superficial duodenal neoplasias might be prevented by prophylactic endoscopic closure: analysis of risk factors. Dig Endosc 2015; 27: 323-330