The statistically significant differences in the size of the immunopositive areas between CK and the myoepithelial markers (calponin, SMA, vimentin) were attributed to the immunoreactivity of CK with all epithelial cells (tumor cells and ME cells), whereas calponin stained ME cells and some tumor cells, while vimentin and SMA solely labelled ME cells. The gene discussed is VIM; the disease is neoplasm.