MSI before HP eradication MSI after HP eradication p Low grade MALT 6/30            (20%) 0/30                 (0%) <0.001 MALTDLBCL 16/36a#          (44%) 2/36               (6%) <0.001 De novo DLBCL 15/41b#             (36%) 5/41                (12%) <0.01 a- Low a grade MALT vs. MALT BLBCL b- Low-grade MALT vs. De Novo BLBCL c- MALT BLBCL vs. De Novo BLBCL * P<0.001, $ P<0.01, # P<0.05

Table 2: Incidence of MSI in gastric lymphoma patients before and after helicobacter eradication.