Expression of Cyclin D1 Is Associated with β-Catenin Expression and Correlates with Good Prognosis in Colorectal Adenocarcinoma 1

Background: The aim of this study is to investigate the prevalence and prognostic impact of β-catenin and cyclin D1 expression in colorectal carcinoma (CRC) patients. Method: We evaluated immunohistochemial expression of β-catenin and cyclin D1 using 2-mm cores from 220 CRC patients for tissue microarray, and its significance was statistically evaluated. Result: Positive expression of β-catenin and cyclin D1 was found in 72.5% (158 of 218 cases) and 59.4% (129 of 217 cases) of CRC patients, respectively. Expression of β-catenin was significantly correlated with tumor location (P = .017), differentiation (P = .010), lymph node metastasis (P = .032), preoperative carcinoembryonic antigen level (P = .032), and cyclin D1 expression (P = .005). Expression of cyclin D1 was significantly correlated with recurrence and/or metastasis (P = .004). In univariate analysis, β-catenin expression predicted more favorable overall survival (P = .022) and cyclin D1 expression predicted both more favorable overall survival and relapse-free survival (P = .004 and P = .006, respectively). Multivariate analysis showed that tumor stage and expression of cyclin D1 were independent prognostic factors significantly associated with overall survival and relapse-free survival. Conclusion: This study shows that expression of β-catenin and cyclin D1 is associated with favorable clinicopathologic variables and it is a clinically significant prognostic indicator for CRC patients.