To monitoring the degree of inflammation, we chose as a model tumor progression from tissue neoplasms to the metastatic stage [5], a process associated with a strong inflammatory increase, while, as a biomarker of this model, we chose matrix metalloproteinase-9 (MMP-9 (also called gelatinase B)), an enzyme that is overexpressed in cancer and various inflammatory conditions [6]. This evidence concerns the gene MMP9 and cancer.