What happens if a child doesn’t have a matching family member? How are unrelated donors found?

What happens if a child doesn't have a matching family member? How are unrelated donors found?

if we have a fully matched sibling use that sibling as our donor. If there's no contraindication for the donor or for the recipient to receive those cells from their sibling, because that gives us the lowest risk for complications from the transplant itself. When we don't have a fully matched sibling donor, then we have to look at what our other options are first go to is looking to see if they have a fully matched, unrelated donor. That's in one of the many registries around the world. And these donors are people that have volunteered to have a cheek swab or a blood test to get their HLA typing. And we compare the HLA typing between all these people that have been typed, whether it was because they were part of a bone marrow drive or they had a loved one themselves, they were hoping to be a match with, or they were just feeling generous, and then they decided to get typed. And that typing goes into these large databases that we can query to identify whether we have a fully matched, unrelated donor on these HLA proteins to use. We can use fully matched unrelated donors, slightly mismatched unrelated donors. And then beyond that, the other alternative donors are cord blood units, which typically are somewhat mismatched. But that's tolerated with these very naive immune systems that come with the cord blood units or will use a half matched family member like a parent, a child or a sibling. That's not a full match.