Fig. 3

Pathological images. a Ureteral epithelium was intact. Solid metastatic nest in intra- and extraureteral wall (hematoxylin and eosin stain, original magnification ×12.5). b Tumor showed a little glandular differentiation (hematoxylin and eosin stain, original magnification ×400). c Tumor cells stained positive for prostate-specific antigen (original magnification ×200)