MMP9 and squamous cell carcinoma of penis: Vincenzo Ficarra et al. and Muneer, A. et al. reviewed the reported data concerning the prognostic markers in patients with penile squamous cell carcinoma (SCC) including tumor histologic grade, tumor histologic subtype, tumor pathologic extension and lymphatic and/or venous embolization, metastasis in regional lymph nodes, tumor growth pattern, p53, E-cadherin, MMP-2, and MMP-9 [5, 6].