HLA-B and chondrosarcoma: Also HLA-B, -C heavy chain expression was significantly higher on average in higher-grade conventional chondrosarcoma than in grade 1 chondrosarcoma: 49% ± 25 (mean expression of 35 grade 2 and grade 3 tumors analyzed, range 10-85%) versus 27% ± 21 (mean expression of 17 grade 1 tumors analyzed, range 10-75%), p=0.0053.