Through the analyses of 82 pituitary tumors, Hui et al. showed that the expression of MMP-1, -2, -9, -14, and -15 genes were elevated in invasive pituitary tumors compared to non-invasive pituitary tumors or normal anterior pituitary glands, highlighting MMP-14 as the gene with the highest expression. The gene discussed is MMP14; the disease is pituitary tumor.