KRT8 and neoplasm: While in low-grade WAP-T tumors vimentin staining was mostly limited to septa and the stromal compartment (Figure 3C), variable expression of vimentin was also detectable in the epithelial compartment (represented by Krt8/18) in high-grade WAP-T tumors (Figure 3B), indicating an intermediate differentiation state of tumor cells in G-2 derived and high-grade WAP-T tumors and an epithelial differentiation state of tumor cells in low-grade WAP-T tumors.