Table 4. Relationship between the expression of VEGF and CD73 and RCC lymph node metastasis (n).

Items	n	VEGF					CD73
		−	+	++	+++		−	+	++	+++
Lymphatic metastasis
With	17	2	1	7	7		1	1	8	7
Without	59	25	16	14	4		19	18	16	6
Z	–	3.782					3.717
P	–	0.001					0.000

VEGF, vascular endothelial growth factor; RCC, renal cell carcinoma.