Retrospective Study
Copyright ©The Author(s) 2021. Published by Baishideng Publishing Group Inc. All rights reserved.
World J Gastrointest Surg. Sep 27, 2021; 13(9): 1012-1024
Published online Sep 27, 2021. doi: 10.4240/wjgs.v13.i9.1012
Optimal postoperative surveillance strategies for stage III colorectal cancer
Min Young Park, In Ja Park, Hyo Seon Ryu, Jay Jung, Minsung Kim, Seok-Byung Lim, Chang Sik Yu, Jin Cheon Kim
Min Young Park, Colon and Rectal Surgery, Asan Medical Center, Seoul 05505, South Korea
In Ja Park, Hyo Seon Ryu, Jay Jung, Minsung Kim, Seok-Byung Lim, Chang Sik Yu, Jin Cheon Kim, Colon and Rectal Surgery, Asan Medical Center and University of Ulsan College of Medicine, Seoul 05505, South Korea
Author contributions: Kim JC, Yu CS, and Lim SB guaranted the integrity of the study; Park IJ conceptualized the study; Park IJ and Park MY collected the data, edited the manuscript; Park MY did statistical analysis and prepared manuscript; Park IJ, Park MY, Ryu HS, Jung J, and Kim MS reviewed manuscript; all authors have read and approve the final manuscript.
Institutional review board statement: This study was approved by the Institutional Review Board of Asan Medical Center, No: 2017-0955.
Informed consent statement: Patients were not required to give informed consent to the study because the analysis used anonymous clinical data that were obtained after each patient agreed to treatment.
Conflict-of-interest statement: We have no financial relationships to disclose.
Data sharing statement: No additional data are available.
Open-Access: This article is an open-access article that was selected by an in-house editor and fully peer-reviewed by external reviewers. It is distributed in accordance with the Creative Commons Attribution NonCommercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited and the use is non-commercial. See: http://creativecommons.org/Licenses/by-nc/4.0/
Corresponding author: In Ja Park, MD, PhD, Doctor, Professor, Surgeon, Colon and Rectal Surgery, Asan Medical Center and University of Ulsan College of Medicine, No. 88 Olympic-ro, Songpa-gu, Seoul 05505, South Korea. ipark@amc.seoul.kr
Received: February 24, 2021
Peer-review started: February 24, 2021
First decision: May 13, 2021
Revised: June 3, 2021
Accepted: August 2, 2021
Article in press: August 2, 2021
Published online: September 27, 2021
Processing time: 206 Days and 0.2 Hours
Core Tip

Core Tip: This is a retrospective study to evaluate the association between surveillance intensity and recurrence and survival rates in patients with stage III colorectal cancer (CRC). The overall survival (OS) and recurrence-free interval (RFI) was longer in the low intensity group. Post-recurrence survival (PRS) did not change according to surveillance intensity. Therefore, frequent postoperative imaging studies do not improve OS or RFI in patients with stage III CRC. However, in high-risk patients, early detection of recurrence improves the chance of curative resection, which may improve PRS.