Impact of target volume delineation accuracy on locoregional control and survival after postoperative radiotherapy for colorectal cancer

doi:10.4240/wjgs.117559

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World Journal of Gastrointestinal Surgery

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1948-9366

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Baishideng Publishing Group Inc, 7041 Koll Center Parkway, Suite 160, Pleasanton, CA 94566, USA

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Copyright: ©Author(s) 2026. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial (CC BY-NC 4.0) license. No commercial re-use. See permissions. Published by Baishideng Publishing Group Inc.

World J Gastrointest Surg. Aug 27, 2026; 18(8): 117559
Published online Aug 27, 2026. doi: 10.4240/wjgs.117559

Table 3 Comparison of recurrence patterns between the two groups, n (%)

Recurrence pattern	Accurate target volume group (n = 23)	Inaccurate target volume group (n = 33)	χ² value¹	P value
In-field recurrence	15 (65.2)	8 (24.2)	10.236	0.006
Marginal recurrence	5 (21.7)	14 (42.4)
Out-of-field recurrence	3 (13.0)	11 (33.3)

¹χ² test was used for overall comparison (df = 2).

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Citation: Xing Y, Gu M. Impact of target volume delineation accuracy on locoregional control and survival after postoperative radiotherapy for colorectal cancer. World J Gastrointest Surg 2026; 18(8): 117559
URL: https://www.wjgnet.com/1948-9366/full/v18/i8/117559.htm
DOI: https://dx.doi.org/10.4240/wjgs.117559