Table 2.

Semi-quantitative evaluation of immunohistochemical staining

Score	0	1	2	3
CD68	Negative	≤ 10 positive cells	> 10 positive cells	< 50% positive cells
CD3-CD20	Negative	From one to half perivascular aggregate with or without focal interstitial infiltration positive	All perivascular aggregate and/or focal interstitial infiltration positive
CD138	Negative	≤ 10 positive cells	> 10 positive cells in perivascular aggregate and/or in focal interstitial infiltration	> 10 positive cells both in perivascular aggregate and in focal interstitial infiltration