Table 4: The frequency of MLH1 promoter methylation and MLH1 mutation in GC patients with abnormal MLH1 expression.

Sporadic GCFamilial GC
( )( )
(%) (%)

MLH1 promoter
 Methylation3 (100)5 (55.6)
 Unmethylation04 (44.4)
MLH1 mutation
 Yes01 (11.1)
 No3 (100)8 (88.9)