How theBRAFV600E Mutation Defines a Distinct Subgroup of Colorectal Cancer: Molecular and Clinical Implications

Author:

Bond Catherine E.1ORCID,Whitehall Vicki L. J.123

Affiliation:

1. Conjoint Gastroenterology Laboratory, QIMR Berghofer Medical Research Institute, Brisbane, Queensland, Australia

2. School of Medicine, The University of Queensland, Australia

3. Pathology Queensland, Brisbane, Queensland, Australia

Abstract

TheBRAFoncogene is an integral component of the MAP kinase pathway, and an activating V600E mutation occurs in 15% of sporadic colorectal cancer. This is an early event in serrated pathway tumourigenesis, and theBRAFV600E has been commonly associated with the CpG island methylator phenotype, microsatellite instability (MSI), and a consistent clinical presentation including a proximal location and predilection for elderly females. A proportion of theBRAFmutant lesions remain as microsatellite stable (MSS), and in contrast to the MSI cancers, they have an aggressive phenotype and correlate with poor patient outcomes. Recent studies have found that they have clinical and molecular features of both theBRAFmutant/MSI and the conventionalBRAFwild-type cancers and comprise a distinct colorectal cancer subgroup. This review highlights the importance of theBRAFmutation occurring in colorectal cancer stratified for molecular background and discusses its prognostic and clinical significance.

Publisher

Hindawi Limited

Subject

Gastroenterology,Hepatology

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