Figure legends:
Figure 1A: Histopathoogical wiev of epithelial component (black arrow) (H&E, x40), 1B: luminal staining of COX-2 in epithelial component (black arrow) (COX-2, x40).
Figure 2A: Histopathoogical wiev of epithelial (black arrow) and blastemal component (blue arrow) (H&E, x40), 2B: luminal staining of COX-2 in epithelial component (black arrow) and weak stoplasmic staining in blastamel component (blue arrow) (COX-2, x40).