Table 4.

Number and percentage of mRNA positive samples in histiocytomas of groups I, II, III and IV

	Group I (n = 6)	Group II (n = 5)	Group III (n = 10)	Group IV (n = 9)
iNOS	0/6 (0%)	3/5 (60%)	7/10 (70%)	7/9 (78%)
IL-2	1/6 (17%)	4/5 (80%)	9/10 (90%)	8/9 (89%)
IL-12	1/6 (17%)	0/5 (0%)	4/10 (40%)	5/9 (56%)
TNF-α	5/6 (83%)	5/5 (100%)	10/10 (100%)	9/9 (100%)
IFN-γ	0/6 (0%)	5/5 (100%)	10/10 (100%)	8/9 (89%)
IL-10	6/6 (100%)	5/5 (100%)	10/10 (100%)	9/9 (100%)
TGF-β	6/6 (100%)	5/5 (100%)	10/10 (100%)	9/9 (100%)

Positive tumours/total number of tumours (percentage), n=number of animals in group.