Table 2.

Correlation between both PD-1 and PD-L1 expression on the tumor infiltrating cells and the grade of tumor infiltration.

	Level of Infiltration
Variables	3+	2+	1+	0	p value
PD-1 Expression					9.73*10–5
High	1	2	0	0
Medium	0	7	2	0
Low	0	2	9	0
None	1	2	8	9
PD-L1 Expression					0.019
High	1	0	0	0
Medium	0	4	0	0
Low	1	2	1	0
None	1	6	18	9