HLA matching is used to match patients and donors for blood or marrow transplants. It’s much more complicated than blood typing. For HLA matching: You and potential donors will have blood drawn The blood is tested in a lab to figure out your HLA type Your HLA will be compared to potential donors to see if there is a match There are many HLA markers. Each HLA marker has a name. The names are letters or combinations of letters and numbers. Sometimes, it’s hard to find a match because some HLA types are less common. HLA types are inherited so siblings can sometimes be a match for each other. Each of your brothers and sisters who has the same mom and dad as you has a 1 in 4 chance (25%) of being a complete, or full, match. You’re more likely to match someone with a similar ethnic background or ancestry.
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