Table 4

MHC class I expression in sarcoma tumors.

Histological subtype	Case no.	MHC class I expression
Histological subtype	Case no.	W6/32 ^a	Interpretation ^b
Gastrointestinal stromal tumor	1	C1	+
	2	C2	+
	3	A1	-
	4	B1	+
	5	C2	+
Synovial sarcoma	1	A0	-
Uterine leiomyosarcoma	1	C2	+
	3	C2	+
	4	C2	+
Leiomyosarcoma	1	A0	-
	2	A0	-
	3	C2	+
	4	C2	+
	5	C2	+
	6	C2	+
Angiosarcoma	1	C2	+
Angiosarcoma	3	C2	+
Malignant fibrous histiocytoma	1	C2	+
	2	A0	-
	4	C2	+
	5	B2	+
Liposarcoma	1	C2	+
	2	A0	-
	5	C2	+
	6	A2	+
Chondrosarcoma	1	C2	+

^aW6/32 scoring based on intensity (score from 0 to 3) and percentage of positive cells (A: <25% positive cells, B: 25-75% positive cells, C: >75% positive cells). ^bCases were considered negative if the immunohistochemical staining had a score of 0 to 1 in less than or equal to 25% tumor cells (A0 or A1). All other cases were considered positive.