Journal
CANCER
Volume 119, Issue 23, Pages 4137-4144Publisher
WILEY-BLACKWELL
DOI: 10.1002/cncr.28347
Keywords
hepatectomy; predictors; factors; molecular; personalized therapy
Categories
Funding
- NCI NIH HHS [P30 CA006973] Funding Source: Medline
Ask authors/readers for more resources
BACKGROUNDMolecular biomarkers offer the potential for refining prognostic determinants in patients undergoing cancer surgery. Among patients with colorectal cancer, KRAS and BRAF are important biomarkers, but their role in patients undergoing surgical therapy for liver metastases is unknown. In this study, the incidence and prognostic significance of KRAS and BRAF mutations were determined in patients undergoing surgical therapy of colorectal liver metastases (CRLM). METHODSKRAS and BRAF analysis was performed on 202 patients undergoing surgery for CRLM between 2003 and 2008. Tumor samples were analyzed for somatic mutations using sequencing analysis (KRAS, codon12/13, BRAF, V600E). The frequency of mutations was ascertained, and their impact on outcome was determined relative to other clinicopathologic factors. RESULTSKRAS gene mutations were detected in 58/202 patients (29%). In contrast, mutation in the BRAF gene was identified in very low frequency in this surgical cohort, found in only 4/202 (2%) patients. On multivariate analysis, KRAS mutation was associated with worse survival (hazard ratio [HR], 1.99; 95% confidence interval [CI], 1.21-3.26), as well as recurrence risk (HR, 1.68; 95% CI, 1.04-2.70). Although other clinicopathologic features, including tumor number, carcinoembryonic antigen, and primary stage were also associated with survival, KRAS status remained independently predictive of outcome. The low incidence of BRAF mutation limited assessment of its prognostic impact. CONCLUSIONWhereas KRAS mutations were found in approximately one third of patients, BFAF mutations were found in only 2% of patients undergoing surgery for CRLM. KRAS status was an independent predictor of overall and recurrence-free survival. Molecular biomarkers such as KRAS may help to refine our prognostic assessment of patients undergoing surgical therapy for CRLM. Cancer 2013;119:4137-4144. (c) 2013 American Cancer Society. In this study of molecular biomarkers in patients undergoing surgical therapy of colorectal liver metastasis, KRAS mutations were found in approximately one third of patients, whereas BFAF mutations were found in only 2% of patients. KRAS status was an independent predictor of outcome and, as such, may help to refine our prognostic assessment of patients undergoing surgical therapy for colorectal liver metastases.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available