Fig. 2

a Illustrated anatomy of the ureterovesical junction. b Plasmacytoid urothelial carcinoma tumor cells extend into the muscularis propria of the ureter in radical cystectomy specimen (arrows) (H&E, x4). c Plasmacytoid urothelial carcinoma tumor cells extend into the adventitia of the ureter in radical cystectomy specimen (arrows) (H&E, x4). d Magnified (H&E, x10) of b, pan cytokeratin staining highlights tumor cells, inset (H&E, x20). e Magnified (H&E, x10) of c, pan cytokeratin staining highlights tumor cells, inset (H&E, x20)