Appendiceal malignancies with peritoneal spread have been successfully treated with Cytoreductive Surgery (CRS) and hyperthermic intraperitoneal chemotherapy (HIPEC). The aim of this study is to clarify the utility of common tumor markers in selecting patients for the combined treatment.
Data on 56 patients with appendiceal neoplasms treated with CRS and HIPEC were prospectively collected. Chi square test was used to analyze a link between common tumor markers and completeness of cytoreduction score (CC score) and preoperative peritoneal cancer index score (PCI score). Cox proportional hazard model was used to perform survival analysis.
Forty-two patients were alive after 3 years of follow-up. Hazard ratio of disease related death was 5.6 (95% CI, 1.8–17.2) among patients with high CC score as compared to those with low CC score. Number of abnormal tumor markers (0 vs 1/2/3) correlated with PCI score 16.2 vs 32.5 (p < 0.001) but not with completeness of cytoreduction or survival. The 3-year survival rates in patients with normal vs abnormal CA 125 levels were 83% vs 52%(p = 0.003).
Multiple abnormal tumor markers were not useful as an exclusion criterion for patients undergoing CRS. Elevation in CA 125 was an important indicator of survival in these patients. Complete cytoreduction was crucial for long-term survival.
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Accepted: May 17, 2010
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