Table 4

MHC class I expression in sarcoma tumors.

Histological subtype Case no. MHC class I expression
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 +
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.