Sarcomatoid Variant of Urothelial Carcinoma of the Renal Pelvis with Inferior Vena Cava Tumour Thrombus: A Case Report and Literature Review

Table 1

Comparison of immunohistochemistry findings in the sarcomatous and urothelial components.

Antibody	Carcinoma component	Sarcomatoid component
CK 7	Diffusely positive, strong intensity	Weak, focal positive
CK 20	Focally positive, strong intensity	Negative
p53	Focally positive, strong intensity	Negative
P63	Diffusely positive, strong intensity	Negative
GATA-3	Diffusely positive, strong intensity	Weak, focal positive
Vimentin	Negative	Diffusely positive, strong intensity
Desmin	Negative	Negative
Smooth muscle action	Negative	Negative