GAST and neoplasm: This ability can be evaluated using Ki-67, Wnt5, and serum gastrin.[36,37] Some papers have found that the Ki-67 index promoting the proliferation of tumor cells was lower in the eradicated group than in the positive group.[24,38] In addition, Matsuo et al[27] proposed that Wnt5a stimulating invasion of tumor cells was lower in the eradicated group.