Table 3. Correlation between CXCR4 and degree of tumor differentiation (n=60).

Differentiation degree	Case No.	CXCR4				P
		−	+	++	+++
High	13	3	4	5	1	>0.05
Moderate	28	5	10	10	3
Low	19	2	10	6	1
Total	60	10	24	21	5

−, negative; +, weakly positive; ++, moderately positive; +++, strongly positive. CXCR4, CXC chemokine receptor 4.