case_images: PMC5929394_01
case_images: Gross specimen with whitish solid mass in renal pelvis, ureter and kidney
case_images: ijp-13-089-g002.jpg
case_images: PMC5929394_01_ijp-13-089-g002.jpg
case_images: F2
case_images: The tumor also involved the ureter with marked dilatation, irregular nodularities on the surface of upper ureter, wall thickening and intraluminal extension (Figure 2a). The focal epithelial component was formed by islands of urothelial carcinoma with carcinoma in situ in the urothelium of renal pelvis (Figure 2c, 2d). 
case_images: Section showing sarcomatous area with abundant osteoid production (H&E stain X 200
case_images: ijp-13-089-g003.jpg
case_images: PMC5929394_01_ijp-13-089-g003.jpg
case_images: F3
case_images: The sarcomatous component was found to have positive results for vimentin (Figure 3 a, b). 