Table 3

Expression of hMLH1 and hMSH2 and hMLH1 promoter methylation statusa N (%)

All tumors (n = 184)MSI-H (n = 40)MSI-L/MSS (n = 144)Hypermethylation
Yes (n = 20)No (n = 17)
hMLH1 absent26 (14)26 (65)017 (85)7 (41)
hMSH2 absent6 (3)6 (15)006 (35)
hMLH1 and hMSH2 present152 (83)8 (20)144 (100)3 (15)4 (24)
  • a The hMLH1 promoter methylation status of three MSI-H tumors could not be determined.