
Donor/recipient HLA match grades (HLA-and –B antigens)8)
Grade | Interpretation |
---|---|
A | All 4 donor antigens identical |
B1U | All donor antigens identical; only 3 antigens detected in donor |
B2U | All donor antigens identical; only 2 antigens detected in donor |
B1X | 3 donor antigens identical; the 4th is cross-reactive with a recipient antigen |
B2UX | 2 donor antigens identical; a 3rd is cross-reactive; only 3 antigens detected in donor |
B2X | 2 donor antigens identical; 2 are cross-reactive |
B3UX | 1 donor antigen identical to, 2 cross-reactive with recipient; only 3 antigens detected in donor |
B3X | 1 donor antigen identical to 1 in recipient; 3 are cross-reactive |
B4X | 4 donor antigens cross-reactive |
C | 1 donor antigen mismatched (not cross-reactive) |