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performed. A negative cross match says to the recipient, you are not likely to reject the donor organ and the operation should be performed. If we look at the cross match in this way, the positive and negative results make sense to all concerned. A well matched kidney is one in which the blood type between the donor and recipient are
1 Kidneys can be received by a patient even if the HLAs arenât a complete match as long as the blood type is compatible.  Cross-matching antigens. The last test before implanting an organ is the cross-match. A small sample of blood from both the donor and recipient will be mixed in a tube to see if thereâs a reaction.