Abstract
Objective
The purpose of this paper is to determine whether sites of distant recurrence are associated with specific locations of primary disease in colon cancer.
Methods
A cohort including all patients (n = 947) undergoing a segmental colonic resection for colon cancer at our center (2004–2011) comparing site-specific metastatic presentation and recurrence rates, as well as their respective multivariable American Joint Committee on Cancer (AJCC) stage-adjusted hazard ratios (mHR).
Results
Right-sided colectomies (n = 557) had a lower overall metastasis rate (24.8 % vs. 31.8 %; P = 0.017; mHR = 1.24 [95% CI: 0.96–1.60]; P = 0.011) due to significantly lower pulmonary metastasis in follow-up (2.7 % vs. 9 %; P < 0.001; mHR = 0.32 [95% CI: 0.17–0.58]; P = 0.001) and lower overall liver metastasis rate (15.6 vs. 22.1 %; P = 0.012; mHR = 0.74 [95% CI: 0.55–0.99];P = 0.050). Left colectomies (n = 127) had higher rates of liver metastasis during follow-up (9.4 % vs. 4.8 %; P = 0.029; mHR = 1.64 [95% CI: 0.86–3.15]; P = 0.134). Sigmoid resections (n = 238) had higher baseline rates of liver metastasis (17.1 % vs. 11.3 %; P = 0.015) and higher cumulative rates of lung (12.2 % vs. 5.4 %; P < 0.001; mHR = 2.26 [95 % CI: 1.41–3.63]; P = 0.001) and brain metastases (2.3 % vs. 0.6 %; P = 0.033; mHR = 4.03 [95% CI: 1.14–14.3]; P = 0.031). Other sites of metastasis, including the (retro) peritoneum, omentum, ovary, and bone, did not yield significant differences.
Conclusions
Important variations in site-specific rates of metastatic disease exist within major resection regions of colon cancer. These variations may be important to consider when evaluating options for adjuvant treatment and surveillance after resection of the primary disease.
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Conflicts of Interest
None of the authors have conflicts of interest. DB had full access to all the data in the study and takes responsibility for the integrity of the data and the accuracy of the data analysis.
Funding and support
This work was conducted with support from the Harvard Catalyst | The Harvard Clinical and Translational Science Center (National Center for Research Resources and the National Center for Advancing Translational Sciences, National Institutes of Health Award 8UL1TR000170-05, and financial contributions from the Harvard University and its affiliated academic health care centers). The content is solely the responsibility of the authors and does not necessarily represent the official views of Harvard Catalyst, Harvard University, and its affiliated academic health care centers, or the National Institutes of Health.
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This work was supported in part by grants from the Dutch Cancer Society, the Dutch Digestive Society, the Amsterdam University Funds, and the Fulbright Foundation.
Oral presentation at the 95th annual meeting of the New England Surgical Society: September 12–14, Stowe, Vermont
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Amri, R., Bordeianou, L.G., Sylla, P. et al. Variations in Metastasis Site by Primary Location in Colon Cancer. J Gastrointest Surg 19, 1522–1527 (2015). https://doi.org/10.1007/s11605-015-2837-9
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DOI: https://doi.org/10.1007/s11605-015-2837-9