in the tumors , the presence of classic epithelial markers ( including carcinoembryonic antigen , epithelial membrane antigen , secretory component , and keratin ) in the luminal cells of ducts and the intense immunoreactivity with gfap ( with weaker keratin and s-100 staining ) in periductal and stromal cells indicated distinct epithelial and myoepithelial differentiation .
C0007634
cells
C0007589
differentiation