The MMP7 positive expression rate was 45–48.5% in four studies using IHC [3,27,33,35], and 66.7% in one using rt-PCR to detect MMP7 in different parts of gastric tumor specimens [36]; IHC-positive staining was up to 74.1% in the study assessing tumor invasive front [38]. This evidence concerns the gene MMP7 and gastric neoplasm.