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Published in: Journal of Gastroenterology 9/2014

01-09-2014 | Original Article—Alimentary Tract

Novel risk factors for lymph node metastasis in early invasive colorectal cancer: a multi-institution pathology review

Authors: Hideki Ueno, Kazuo Hase, Yojiro Hashiguchi, Hideyuki Shimazaki, Shinji Yoshii, Shin-ei Kudo, Masafumi Tanaka, Yoshito Akagi, Takeshi Suto, Shinji Nagata, Keiji Matsuda, Koji Komori, Kazuhiko Yoshimatsu, Yasuhiko Tomita, Shozo Yokoyama, Eiji Shinto, Takahiro Nakamura, Kenichi Sugihara

Published in: Journal of Gastroenterology | Issue 9/2014

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Abstract

Background

Novel risk factors for lymph node metastasis (LNM) in T1 colorectal cancer (CRC) have been recently proposed, but most have not been implemented because of the lack of validation. Here we determined the value of poorly differentiated clusters (PDCs) in a multi-institutional cohort of T1 CRC cases.

Methods

A pathology review involving 30 institutions was conducted for 3556 T1 CRCs. PDC was defined as malignant clusters comprising ≥5 cells and lacking a glandular formation. The ability to identify LNM risk was compared using Akaike’s information criterion (AIC).

Results

PDC was observed in 1401 tumors (39.4 %), including 94 (17.8 %) with <1000 µm submucosal invasion and 1307 (43.2 %) with ≥1000 µm submucosal invasion (P < 0.0001). The incidence of LNM was higher in PDC-positive tumors (17.4 %) than in PDC-negative tumors (6.9 %; P < 0.0001), and PDCs had an adverse impact on LNM irrespective of the degree of submucosal invasion. Grade 3, vascular invasion, budding, and submucosal invasion depth were also significant factors (all, P < 0.0001). AIC of risk factor to identify LNM risk was most favorable for vascular invasion (2273.4), followed by PDC (2357.4); submucosal invasion depth (2429.1) was the most unfavorable. Interinstitutional judgment disparities were smaller in PDC (kappa, 0.51) than vascular invasion (0.33) or tumor grade (0.48).

Conclusions

PDC is a promising new parameter with good ability to identify LNM risk. Use of its appropriate judgment criteria will enable us determine whether an observational policy can be safely applied following local tumor excision in T1 CRC cases.
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Metadata
Title
Novel risk factors for lymph node metastasis in early invasive colorectal cancer: a multi-institution pathology review
Authors
Hideki Ueno
Kazuo Hase
Yojiro Hashiguchi
Hideyuki Shimazaki
Shinji Yoshii
Shin-ei Kudo
Masafumi Tanaka
Yoshito Akagi
Takeshi Suto
Shinji Nagata
Keiji Matsuda
Koji Komori
Kazuhiko Yoshimatsu
Yasuhiko Tomita
Shozo Yokoyama
Eiji Shinto
Takahiro Nakamura
Kenichi Sugihara
Publication date
01-09-2014
Publisher
Springer Japan
Published in
Journal of Gastroenterology / Issue 9/2014
Print ISSN: 0944-1174
Electronic ISSN: 1435-5922
DOI
https://doi.org/10.1007/s00535-013-0881-3

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