MMP2 and breast carcinoma: In several studies, MMP-2 has been shown to be expressed in breast carcinoma (Liotta and Stetler-Stevenson, 1990; Monteagudo et al, 1990; D'Errico et al, 1991; Davies et al, 1993; Tryggvason et al, 1993; Iwata et al, 1996; Garbett et al, 1999, 2000; Jones et al, 1999) and it has been localised in breast carcinoma cells using immunohistochemical methods (Daidone et al, 1991; Höyhtyä et al, 1994).