Tumor grade		CK20
Tumor grade		Negative	Weak	Moderate	Strong	Total
Low grade	N	5	1	5	7	18
Low grade	%	28	6	28	39	100
High grade	N	1	0	2	4	7
High grade	%	14	0	29	57	100
Total	N	6	1	7	11	25
Total	%	24	4	28	44	100
Chi-square	X²	1.445
Chi-square	P-value	0.695