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CC BY-NC-ND 4.0 · Endosc Int Open 2021; 09(09): E1297-E1302
DOI: 10.1055/a-1477-3186
Original article

The mucin phenotype does not affect the endoscopic resection outcome of non-ampullary duodenal epithelial tumors

Yosuke Toya
1   Division of Gastroenterology, Department of Internal Medicine, School of Medicine, Iwate Medical University, Yahaba, Japan
,
Masaki Endo
1   Division of Gastroenterology, Department of Internal Medicine, School of Medicine, Iwate Medical University, Yahaba, Japan
2   Kaiunbashi Endoscopy Clinic, Morioka, Japan
,
Shun Yamada
1   Division of Gastroenterology, Department of Internal Medicine, School of Medicine, Iwate Medical University, Yahaba, Japan
,
Tomofumi Oizumi
1   Division of Gastroenterology, Department of Internal Medicine, School of Medicine, Iwate Medical University, Yahaba, Japan
,
Toshifumi Morishita
1   Division of Gastroenterology, Department of Internal Medicine, School of Medicine, Iwate Medical University, Yahaba, Japan
,
Risaburo Akasaka
1   Division of Gastroenterology, Department of Internal Medicine, School of Medicine, Iwate Medical University, Yahaba, Japan
,
Shunichi Yanai
1   Division of Gastroenterology, Department of Internal Medicine, School of Medicine, Iwate Medical University, Yahaba, Japan
,
Shotaro Nakamura
1   Division of Gastroenterology, Department of Internal Medicine, School of Medicine, Iwate Medical University, Yahaba, Japan
,
Makoto Eizuka
3   Division of Molecular Diagnostic Pathology, Department of Pathology, School of Medicine, Iwate Medical University, Yahaba, Japan
,
Noriyuki Uesugi
3   Division of Molecular Diagnostic Pathology, Department of Pathology, School of Medicine, Iwate Medical University, Yahaba, Japan
,
Tamotsu Sugai
3   Division of Molecular Diagnostic Pathology, Department of Pathology, School of Medicine, Iwate Medical University, Yahaba, Japan
,
Takayuki Matsumoto
1   Division of Gastroenterology, Department of Internal Medicine, School of Medicine, Iwate Medical University, Yahaba, Japan
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Treatment of non-ampullary duodenal epithelial tumors: Does phenotype matter?Endosc Int Open 2021; 09(09): E1303-E1305
DOI: 10.1055/a-1495-5101

Abstract

Background and study aims Some studies have reported an association between clinicopathological features and mucin phenotypes of non-ampullary duodenal epithelial tumors (NADETs). However, the association between clinical outcomes of endoscopic resection (ER) and mucin phenotypes has not been elucidated. The aim of this retrospective study was to analyze clinical outcomes of ER of NADETs with reference to mucin phenotypes.

Patients and methods We retrospectively evaluated the clinical outcomes of ER for NADETs performed from 2006 to 2019 and compared clinicopathological characteristics, ER procedures, and outcomes, including adverse events (AEs) among tumors classified by mucin phenotype. Mucin phenotypes were classified as gastric, gastrointestinal, and intestinal based on immunohistochemical examination. Grade of dysplasia was determined according to the Vienna classification (VCL).

Results The proportion of VCL 4/5 was higher in the gastric type (50 %) compared with that in the gastrointestinal (39.1 %, P = 0.009) and intestinal types (5.4 %, P = 0.008), respectively. With no statistical difference in tumor size and ER method among the three groups, no significant difference was observed for ER outcomes, i. e., en bloc and R0 resection rates. In the gastrointestinal and intestinal types, AEs occurred in four cases treated with ESD, but none developed in the gastric type.

Conclusions This study suggests that the mucin phenotype does not affect resection outcome. However, considering high malignant potential and tendency for low AE rates, the gastric type NADETs may be more appropriate for proactive ER than the others.



Publication History

Received: 22 December 2020

Accepted: 08 March 2021

Article published online:
16 August 2021

© 2021. The Author(s). This is an open access article published by Thieme under the terms of the Creative Commons Attribution-NonDerivative-NonCommercial License, permitting copying and reproduction so long as the original work is given appropriate credit. Contents may not be used for commercial purposes, or adapted, remixed, transformed or built upon. (https://creativecommons.org/licenses/by-nc-nd/4.0/)

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