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01-09-2017 | Original Article

A comparison of the localization of rectal carcinomas according to the general rules of the Japanese classification of colorectal carcinoma (JCCRC) and Western guidelines

Authors: Akira Tanaka, Sotaro Sadahiro, Toshiyuki Suzuki, Kazutake Okada, Gota Saito

Published in: Surgery Today | Issue 9/2017

Abstract

Purpose

The aim of this study was to compare the localization of rectal cancers as classified according to the general rules of the Japanese classification of colorectal carcinoma (JCCRC) and also according to the European Society for Medical Oncology (ESMO) and the National Comprehensive Cancer Network (NCCN) guidelines, which are based on rigid endoscopic measurements.

Methods

The medical records of patients scheduled to receive curative surgery for histologically proven rectal adenocarcinoma during 2009–2015 were investigated (n = 230). Rigid proctoscopy was performed in patients with rectal cancer located in the upper (Ra) or lower (Rb) division using double-contrast barium enema.

Results

The median values of height from the anal verge were 7.5 cm (range 2–12) and 3 cm (0–9.5) on rigid proctoscopy for cancers assigned as Ra and Rb, respectively. All 159 cancers at Ra or Rb were located within 12 cm from the anal verge by rigid proctoscopy, while only 79.7% of Ra or 82.1% of Rb cancers were located in the mid (5.1–10 cm) or low (≤5 cm) rectum, respectively.

Conclusion

Ra and Rb cancers are deemed to be rectal cancers according to NCCN guidelines, but these classifications are not interchangeable with mid- and low-rectal cancers, respectively, according to the ESMO guidelines.

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Title: A comparison of the localization of rectal carcinomas according to the general rules of the Japanese classification of colorectal carcinoma (JCCRC) and Western guidelines
Authors: Akira Tanaka
Sotaro Sadahiro
Toshiyuki Suzuki
Kazutake Okada
Gota Saito
Publication date: 01-09-2017
Publisher: Springer Japan
Published in: Surgery Today / Issue 9/2017
Print ISSN: 0941-1291
Electronic ISSN: 1436-2813
DOI: https://doi.org/10.1007/s00595-017-1487-9

Keynote webinar | Spotlight on medication adherence

Springer Medicine

A comparison of the localization of rectal carcinomas according to the general rules of the Japanese classification of colorectal carcinoma (JCCRC) and Western guidelines

Abstract

Purpose

Methods

Results

Conclusion

Keynote webinar | Spotlight on medication adherence

Springer Medicine

Abstract

Purpose

Methods

Results

Conclusion

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