Table 5.

Summary of IHC staining results.

Antibody	Median Allred score
	Tumor (11)	Normal (19)	p Value
IGF-1R (all)	7	4	<0.001
MSa	7	4	0.014
Non-MS	6.5	4	<0.001
IR (all)	2	5	0.05
MSa	3	4	0.54
Non-MS	0	5	0.02
S100b
MS	63.5		0.1
Non-MS	34
CD68c
MS	198		0.52
Non-MS	239
% CD68d
MS	71.4%		0.27
Non-MS	75%

IHC: immunohistochemistry; HPF: high-power field (×100).

^aMS, N = 7 and non-MS, N = 4.

^bTumor infiltration by histiocytes, sum of staining positive cells in 5 HPFs.

^cTumor infiltration by macrophage, sum of staining positive cells in 5 HPFs.

^d% of cases with tumor cell staining positive for CD68.