Fig. 5

Electron microscopy analysis and CD10 immunostain of plasmacytoid urothelial carcinoma. Electron microscopy was performed on a representative section of tumor demonstrated nuclei pushed aside by intracellular vacuoles with microvilli lining the inner surface (a,c), Hematoxylin and eosin of the tumor (b) and a CD10 immunostain showing an apical cytoplasmic staining pattern, similar to those reported in microvillous inclusion disease (d)