Treatment delay may have detrimental effects on cancer outcomes. The impact of longer delays on colorectal cancer outcomes remains poorly described. The objective of this study was to determine the effect of delays to curative-intent surgical resection on survival in colorectal cancer patients.
All adult patients undergoing elective resection of primary non-metastatic colorectal adenocarcinoma from January 2009 to December 2014 were reviewed. Treatment delays were defined as the time from tissue diagnosis to definitive surgery, categorized as < 4, 4 to < 8, and ≥ 8 weeks. Primary outcomes were 5-year disease-free (DFS) and overall survival (OS). Statistical analysis included Kaplan–Meier curves and Cox regression models.
A total of 408 patients were included (83.2% colon;15.8% rectal) with a mean follow-up of 58.4 months (SD29.9). Fourteen percent (14.0%) of patients underwent resection < 4 weeks, 40.0% 4 to < 8 weeks, and 46.1% ≥ 8 weeks. More rectal cancer patients had treatment delay ≥ 8 weeks compared with colonic tumors (69.8% vs. 41.4%, p < 0.001). Cumulative 5-year DFS and OS were similar between groups (p = 0.558; p = 0.572). After adjusting for confounders, surgical delays were not independently associated with DFS and OS.
Treatment delays > 4 weeks were not associated with worse oncologic outcomes. Delaying surgery to optimize patients can safely be considered without compromising survival.
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MT is supported by research scholarships from the Quebec Health Sciences Research Fund (FRQ-S) and the Canadian Institute for Health Research (CIHR).
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These data were presented at Digestive Disease Week 2019, May 19, 2019, San Diego, CA
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Trepanier, M., Paradis, T., Kouyoumdjian, A. et al. The Impact of Delays to Definitive Surgical Care on Survival in Colorectal Cancer Patients. J Gastrointest Surg 24, 115–122 (2020). https://doi.org/10.1007/s11605-019-04328-4