Abstract:
INTRODUCTION:Left- and right-sided colon cancers were significantly different in epidemiologic, clinical and histological parameters. However, the impact of primary tumor location in metastatic colon cancer treated with front-line targeted triplet regimens is unclear, particularly in Asian populations. METHODS:A total of 121 patients with KRAS exon 2 codon 12/13 wild-type metastatic colon cancer were enrolled between January 2007 and December 2013. All patients received one target agent, such as cetuximab or bevacizumab, as a front-line targeted triplet regimen. The impact of primary tumor location for cetuximab and bevacizumab groups was analyzed, respectively. RESULTS:In cetuximab group, left-sided metastatic colon cancer was superior to right-sided metastatic colon cancer in objective response rate (70.1% vs 33.3%, P = 0.024), progression-free survival (15.0 vs 5.3 months, P < 0.001) and overall survival (35.8 vs 14.4 months, P = 0.031). Primary tumor location was an independent prognostic factor for progression-free survival (hazard ratio 0.240, 95% confidence interval 0.114-0.508, P < 0.001). However, in the bevacizumab group, there were no differences in outcomes for either side. Primary tumor location was insignificant for progression-free survival and overall survival in univariate analysis. CONCLUSION:Left-sided primary tumors were favored in cetuximab-based front-line targeted triplet regimen for metastatic colon cancer.
journal_name
Asia Pac J Clin Oncoljournal_title
Asia-Pacific journal of clinical oncologyauthors
Lu HJ,Lin JK,Chen WS,Jiang JK,Yang SH,Lan YT,Lin CC,Chang SC,Teng HWdoi
10.1111/ajco.12469subject
Has Abstractpub_date
2016-09-01 00:00:00pages
207-15issue
3eissn
1743-7555issn
1743-7563journal_volume
12pub_type
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