Prognostic Significance of c-erbB-2 and Vascular Endothelial Growth Factor in Colorectal Liver Metastases

Abstract

The prognostic value of c-erbB-2 and vascular endothelial growth factor (VEGF) expression in colorectal liver metastases (CLM) is unclear. The purpose of this study was to clarify the relationship of c-erbB-2 and VEGF with the clinicopathological parameters and the survival results in CLM. For 44 patients who had undergone liver resection for CLM at Fudan University Cancer Hospital from 2000 to 2007, the expression of c-erbB-2 and VEGF in CLM and the corresponding primary cancer specimens were evaluated immunohistochemically. The correlations among c-erbB-2 and VEGF, clinicopathologic factors, and survival were then statistically analyzed. Positive expression rates of c-erbB-2 and VEGF in CLM lesions were 38.64% and 52.72%, respectively. The expression of c-erbB-2 and VEGF in CLM were similar to that of corresponding primary tumor. c-erbB-2 expression correlated with number of metastatic lesions and the distribution of liver metastases. The expression of VEGF correlated with the size of liver metastatic lesion and distribution of liver metastases. A statistically significant association between the expression of c-erbB-2 and VEGF in both CLM and primary tumor was noted. Univariate analysis showed that VEGF was a prognostic factor. However, on multivariate analysis, expression of VEGF was not an independent prognostic marker. Patients with both negative expression of c-erbB-2 and VEGF expression had a better outcome than others. VEGF might be a statistically significant prognostic factor. The combined analysis of c-erbB-2 and VEGF is of added prognostic value. An association exists between c-erbB-2 and VEGF. However, further studies are required to confirm this issue.