The present study aimed to characterize the immunohistochemical expression of vimentin (VIM), of E-cadherin (CDH1), and of cytokeratin 5 (CK5) in patients with invasive ductal carcinomas (IDCs).<h4>Methods</h4> We have constructed a tissue microarray (TMA) from 87 patients with IDC of the breast. This evidence concerns the gene KRT5 and invasive ductal breast carcinoma.