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Microsatellite instability (MSI) phenotype occurs in approximately 15 to 24% of colorectal cancer (CRC) patients and may be sporadic or hereditary. It reflects a mutator phenotype in the tumor due to a lack of mismatch repair system. MSI is indeed one of the characteristics of CRCs occurring in Lynch syndrome and some sporadic cases. CRCs with MSI have a(More)
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