Association of EMMPRIN and fascin expression in renal cell carcinoma: correlation with clinicopathological parameters.

EMMPRIN and fascin are important factors in tumor invasion and progression. We tested the hypothesis that expression of EMMPRIN and fascin correlate with clinicopathological parameters of renal cell carcinoma (RCC). Immunohistochemical analysis of EMMPRIN and fascin were performed in tissue microarrays of 100 surgical specimens, including 35 clear-cell RCC (CRCC), 21 clear-cell RCC with granular differentiation (GRCC), 12 chromophobe RCC (ChRCC), 8 papillary RCC (PRCC), 9 carcinoma of the collecting duct of Bellini (CDC), 10 clear-cell RCC with sarcomatoid differentiation (SRCC), and 6 metastatic RCC. Average immunoscores of EMMPRIN were 100.8 in CRCC, 195.2 in GRCC, 298.4 in ChRCC, 219.2 in PRCC, 186.1 in CDC, 226.9 in SRCC, and 151.7 in metastatic RCC. Among all included cases, average EMMPRIN immunoscores were 84.6 in grade I, 130.4 in grade II, 184.3 in grade III, and 223.5 in grade IV. Additionally, average immunostaining scores of fascin were 53.6 in CRCC, 289.3 in GRCC, 193.3 in ChRCC, 151.8 in PRCC, 181.3 in CDC, 275.4 in SRCC, and 131.7 in metastatic RCC. Average fascin immunoscores were 59.3 in grade I, 91.6 in grade II, 130.2 in grade III, and 194.7 in grade IV. Higher EMMPRIN and fascin immunoscores also correlated significantly with TNM stages and survival rates in RCC. Significant correlation was found between EMMPRIN and fascin expression. In conclusion, higher expression of EMMPRIN and fascin correlate significantly with histological grades, clinical stages, and survival rates of RCC.