MKI67 and cancer: The results indicate that H. pylori infection enhances Ki‐67 expression only in patients with GC, and there is no significant effect on overall cell proliferation; this is also in line with a few previously report with similar findings,32, 33 indicating that Ki‐67 proliferation index is a useful marker to differentiate benign and malignant lesions in gastric biopsies rather than a prognostic biomarker for patient with GC.17, 34 Moreover, there appears to be no strict linkage to cancer progression.