DONOR AND RECIPIENT MATCHING
If your transplanted kidney comes from a deceased donor, the ordinary blood groups (A,B, AB O) and red blood cells of the donor must be compatible with yours. This is similar to matching blood groups for a blood transfusion. We all have antibodies to blood groups different to ours.
If your transplanted kidney comes from a living donor it may be possible to have the transplant even if you and your donor are not from a compatible blood group. This is called an ABO incompatible transplant. Extra treatments will be needed to remove the antibodies before the transplant can go ahead.