MET is a member of the receptor tyrosine kinase and proto-oncogene playing a major role in tumor development and metastasis. MET mutations have been reported in ~2% of colon cancers. MET E168D mutation is located in a conserved domain containing the ligand binding site. In vitro studies have shown that E168D may be associated with higher ligand affinity and higher susceptibility to c-Met inhibitors in lung cancer. The prognostic and predictive significance of MET mutations in colon cancer is not clear and correlation with other clinical and laboratory findings is necessary.
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