Elevated preoperative serum carcinoembrionic antigen level may be an effective indicator for needing adjuvant chemotherapy after potentially curative resection of stage II colon cancer

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Abstract
Background: To determine the prognostic factors and to rationalize adjuvant therapy, the clinicopathologic data of patients with a stage II colon cancer were analyzed retrospectively.Patients and Methods: A total of 392 patients underwent potentially curative resection at the Kurume University Hospital between 1982 and 2005. Postoperative adjuvant chemotherapy using oral fluoropyrimidines was administered in 163 patients, and the other 229 patients underwent surgery alone. Univariate and multivariate analyses for prognostic factors were carried out.Results: Invasive type in gross features, elevated preoperative CEA level, and surgery alone were each an independently significant factor for shorter relapse‐free survival, and tumor size <50 mm, invasive type in gross features, elevated preoperative CEA level, and surgery alone were each an independently significant factor for shorter overall survival. The relapse‐free survival rate and overall survival rate in the patients who received postoperative adjuvant chemotherapy were significantly higher than those in the patients treated with surgery alone even after stratifying to the preoperative CEA level.Conclusion: Patients with an elevated preoperative CEA may be candidates for adjuvant chemotherapy after curative resection in stage II colon cancer. These findings warrant clinical trials to test out the efficacy of adjuvant chemotherapy in stage II colon cancer with an elevated preoperative CEA. J. Surg. Oncol. 2009;99:65–70.

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