Table 3.

Immunohistochemical Evaluation of LAP, PA28α/β, LMP2, LMP7, X, and Y in Fibrosarcoma Lesions and Related Healthy Subcutis.

Antigens	Score
	Healthy Subcutis	Fibrosarcomas
X	++	+/++
Y	++	+
LMP7	+	++
LMP2	+	++
PA28α	-	++
PA28β	+	++
LAP	++	+++

The number of positive cells was estimated semiquantitatively and scored as (-) absence of immunoreaction; (+) 1% to 10% positive cells; (++) 11% to 50% positive cells; (+++) > 50% positive cells. Data refer to the immunohistochemical studies of two different animals.