All 5 microsatellite markers were amplified in 105 cases. Of the 105 cases,there were 14 (13.3%) cases of MSI-H,12 (11.4%) cases of MSI-L and 79 (75.3%) cases of MSS.

• 105例结直肠癌患者26例(24.；7%25)存在微卫星不稳定；其中MSI-H 14例(13