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Published in: International Journal of Colorectal Disease 9/2013

01-09-2013 | Original Article

Risk factors for vertical incomplete resection in endoscopic submucosal dissection as total excisional biopsy for submucosal invasive colorectal carcinoma

Authors: Shun-ichiro Ozawa, Shinji Tanaka, Nana Hayashi, Soki Nishiyama, Motomi Terasaki, Koichi Nakadoi, Hiroyuki Kanao, Shiro Oka, Shigeto Yoshida, Kazuaki Chayama

Published in: International Journal of Colorectal Disease | Issue 9/2013

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Abstract

Purpose

Endoscopic submucosal dissection (ESD) for colorectal tumor is a minimally invasive treatment. Histologic information obtained from the entire ESD specimen is important for therapy selection in submucosal invasive colorectal carcinoma (SMca). This study aimed to identify risk factors for vertical incomplete resection (vertical margin-positive [VM+]) when ESD was performed as total excisional biopsy for SMca.

Methods

From June 2003 through December 2011, 78 SMca cases were resected by ESD at Hiroshima University Hospital. Patient and tumor characteristics, intraoperative variables, and histopathology were compared between the VM+ group and the vertical complete resection (vertical margin-negative) group. The ability of magnifying endoscopy (ME) and endoscopic ultrasonography (EUS) to predict VM+ was assessed.

Results

ESD resulted in VM+ in eight cases (10.3 %), with a greater percentage invading to a depth of ≥2,000 vs. <2,000 μm (P = 0.047). Severe submucosal fibrosis was found in five of the eight cases (62.5 %, P = 0.017). Poor differentiation was seen at the deepest invasive portion in six cases (75.0 %), and two of six cases had an invasion depth <2,000 μm. Of 39 EUS cases, 36 not showing deep invasion close to the muscularis propria were completely resected by ESD.

Conclusions

Submucosal fibrosis and poor differentiation at the deepest invasive portion may be risk factors for VM+ in colorectal ESD for tumors with submucosal deep invasion. ME plus EUS is more likely to help determine whether ESD is indicated as complete total excisional biopsy for SMca.
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Metadata
Title
Risk factors for vertical incomplete resection in endoscopic submucosal dissection as total excisional biopsy for submucosal invasive colorectal carcinoma
Authors
Shun-ichiro Ozawa
Shinji Tanaka
Nana Hayashi
Soki Nishiyama
Motomi Terasaki
Koichi Nakadoi
Hiroyuki Kanao
Shiro Oka
Shigeto Yoshida
Kazuaki Chayama
Publication date
01-09-2013
Publisher
Springer Berlin Heidelberg
Published in
International Journal of Colorectal Disease / Issue 9/2013
Print ISSN: 0179-1958
Electronic ISSN: 1432-1262
DOI
https://doi.org/10.1007/s00384-013-1701-1

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