DSPP and invasive ductal breast carcinoma: Our recent reports show MMP20‐DSPP co‐localization and evidence of interaction in OSCC by iPLA.9 As shown in Figure 4 iPLA representative results on TMAs, strong MMP20‐DSPP interaction signals (brown dots; see also Figure S4) were observed in fibroadenomas and invasive ductal carcinomas of the breast compared with hyperplastic and normal breast epithelium.