Abstract
Purpose
The objectives of the study were to estimate the incidence and clarify the clinicopathologic feature of sporadic microsatellite instability (MSI)-high (MSI-H) colon cancer. Furthermore, the role of MSI in colon cancer prognosis was also investigated.
Methods
Microsatellite status was identified by genotyping. The clinicopathologic differences between two groups (MSI-H vs. MSI-L/S) and the prognostic value of MSI were analyzed.
Results
From 1993 to 2006, 709 sporadic colon cancer patients were enrolled. MSI-H colon cancers showed significant association with poorly differentiated (28.3% vs. 7.2%, p = 0.001), proximally located (76.7% vs. 34.5%, p = 0.001), more high mucin-containing tumor (10.0% vs. 5.1%, p = 0.001) and female predominance (56.7% vs. 30.2%, p = 0.001). In multivariate analysis, MSI-H is an independent factor for better overall survival (HR, 0.459; 95% CI, 0.241–0.872, p = 0.017).
Conclusions
Based on the hospital-based study, MSI-H colon cancers demonstrated distinguished clinicopathologic features from MSI-L/S colon cancers. MSI-H is an independent favorable prognostic factor for overall survival in colon cancer.
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Acknowledgments
We thank the Cancer Registry of Cancer Center, Taipei Veterans General Hospital for providing part of patient follow-up information. The research was supported by Taipei Veterans General Hospital: V100E2-008 and National Science Council 97-2314-B-075-051-MY3
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Chun-Chi Lin and Yi-Ling Lai equally contributed to this study.
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Lin, CC., Lai, YL., Lin, TC. et al. Clinicopathologic features and prognostic analysis of MSI-high colon cancer. Int J Colorectal Dis 27, 277–286 (2012). https://doi.org/10.1007/s00384-011-1341-2
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DOI: https://doi.org/10.1007/s00384-011-1341-2