Table 2b.

β-arrestin-2 and CXCR2 expressions in paired primary tumors and metastatic Lymph nodes

Lesion's Position	β-arrestin-2						CXCR2
	No. of patients						No. of patients
	0	1	2	3	Z*	P value	0	1	2	3	Z*	P value
Primary	21	15	33	18	-2.315	0.021	33	29	23	2	-3.712	<0.001
Metastasis	14	42	31	0			11	37	31	8

*The values were analyzed by Wilcoxon signed-rank test.