MMP7 and cancer: By using the “Expression Analysis-Pathological Stage Plot” module of GEPIA2, a significant association between MMP7 expression and the different pathological stages in several cancer types (Figure 1D), including KICH (Stage I vs. Stage II, P < 0.05), KIRC (Stage I vs. Stage II, P < 0.05), pancreatic adenocarcinoma (PAAD) (Stage I vs. Stage II, P < 0.001), THCA (Stage I vs. Stage II, P < 0.001), SKCM (Stage I vs. Stage II, P < 0.05), and OV (Stage II vs. Stage III, P < 0.01), was detected.