Prognostic Effect of BRAF and KRAS Mutations in Patients With Stage III Colon Cancer Treated With Leucovorin, Fluorouracil, and Oxaliplatin With or Without Cetuximab: A Post Hoc Analysis of the PETACC-8 Trial

JAMA Oncology
J TaiebP Laurent-Puig

Abstract

The prognostic value of BRAF and KRAS mutations in patients who have undergone resection for colon cancer and have been treated with combination leucovorin, fluorouracil, and oxaliplatin (FOLFOX)-based adjuvant chemotherapy is controversial, possibly owing to a lack of stratification on mismatch repair status. To examine the prognostic effect of BRAF and KRAS mutations in patients with stage III colon cancer treated with adjuvant FOLFOX with or without cetuximab. This study included patients with available tumor blocks of resected stage III colon adenocarcinoma who participated between December 2005 and November 2009 in the PETACC-8 phase III randomized trial. Mismatch repair, BRAF V600E, and KRAS exon 2 mutational status were determined on prospectively collected tumor blocks from 2559 patients enrolled in the PETACC-8 trial. The data were analyzed in April 2015. Patients were randomly assigned to receive 6 months of FOLFOX4 or FOLFOX4 plus cetuximab after surgical resection for stage III colon cancer. Associations between these biomarkers and disease-free survival (DFS) and overall survival (OS) were analyzed with Cox proportional hazards models. Multivariate models were adjusted for covariates (age, sex, tumor grade, T/N sta...Continue Reading

Citations

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