Open Access
CC BY-NC-ND 4.0 · Endosc Int Open 2019; 07(05): E664-E671
DOI: 10.1055/a-0848-8048
Original article
Owner and Copyright © Georg Thieme Verlag KG 2019

Endoscopic submucosal dissection in management of colorectal tumors near or involving a diverticulum: a retrospective case series

Victoria Alejandra Jimenez-Garcia
1   National Cancer Center Hospital, Endoscopy Division, Tokyo, Japan
,
Masayoshi Yamada
1   National Cancer Center Hospital, Endoscopy Division, Tokyo, Japan
,
Hiroaki Ikematsu
2   National Cancer Center Hospital East, Division of Endoscopy and Gastrointestinal Oncology, Kashiwa, Japan
,
Hiroyuki Takamaru
1   National Cancer Center Hospital, Endoscopy Division, Tokyo, Japan
,
Seiichiro Abe
1   National Cancer Center Hospital, Endoscopy Division, Tokyo, Japan
,
Taku Sakamoto
1   National Cancer Center Hospital, Endoscopy Division, Tokyo, Japan
,
Takeshi Nakajima
1   National Cancer Center Hospital, Endoscopy Division, Tokyo, Japan
,
Takahisa Matsuda
1   National Cancer Center Hospital, Endoscopy Division, Tokyo, Japan
,
Yutaka Saito
1   National Cancer Center Hospital, Endoscopy Division, Tokyo, Japan
› Author Affiliations
Further Information

Publication History

submitted 29 June 2018

accepted after revision 27 December 2018

Publication Date:
03 May 2019 (online)

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Abstract

Background and study aims Surgery is the standard treatment for colon tumors associated with diverticulum. Use of endoscopic submucosal dissection (ESD) to treat such tumors is controversial. The aim of this study was to assess the safety and feasibility of ESD in treating superficial colorectal tumors situated near or involving diverticulum.

Patients and methods Consecutive patients from two referral centers who had colorectal tumors near or involving diverticulum treated by ESD were retrospectively studied. Clinicopathological characteristics and clinical outcomes were analyzed.

Results Of the 12 patients studied, six had tumors near diverticulum and six had tumors involving diverticulum. The overall en-bloc R0 resection rate, median tumor size and procedure time were 67 %, 26.5 mm (range, 15 – 80 mm) and 110 minutes (range, 50 – 220 minutes), respectively. For tumors near diverticulum group, the en-bloc R0 resection rate was 100 % and no adverse events (AEs) or residual/recurrent tumors were observed. In contrast, for intradiverticular tumors group, the en-bloc R0 resection rate was low at 33 %, and one AE (perforation) was observed. The diverticula were ≥ 6 mm in diameter in the patients with incomplete resection. However, all but one diverticulum was unrecognized before ESD. Two residual tumors were detected at the 12-month surveillance and one required surgery.

Conclusions This case series indicates that ESD is safe and feasible for treating colorectal tumors near a diverticulum and might be feasible for tumors involving a diverticulum smaller than 6 mm. Selection for smaller diverticulum size may contribute to higher en-bloc R0 resection rates.