Increased expression of matrix metalloproteinases (MMP)-2, MMP-9, and the urokinase-type plasminogen activator is associated with progression from benign to advanced ovarian cancer. - Schmalfeldt,B.; Prechtel,D.; Härting,K.; Späthe,K.; Rutke,S.; Konik,E.; Fridmann,R.; Berger,U.; Schmitt,M.; Kuhn,W.; Lengyel,E. (Clin Cancer Res, 2001)