Donor Registries Overrepresent White Donors

This is a supply problem disguised as a medical problem. Stem cell donors are matched on HLA tissue markers, which are inherited, so patients are more likely to match with donors who share similar ancestry. When the registry overrepresents white donors, patients from Black, Hispanic, Asian, Native, and multiracial backgrounds face a much thinner pool of possible matches, which makes unrelated donor search slower and less likely to succeed.

• The mechanics are simple. A transplant center first looks for a close HLA match, often an 8 out of 8 match, in family or registry donors. Federal transplant guidance and NMDP both describe HLA as inherited, which is why ancestry matters so much in practice.
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• The gap shows up in real match rates. NMDP modeling found Black and African American patients had only a 29% chance of finding an available 8 out of 8 unrelated donor, versus much higher odds for white patients. NMDP also notes that ethnically diverse and multiracial patients are less likely to find a full match.
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• This is exactly why private family banking is positioned as an alternative. In the interview, the core pitch is that saving a newborn's cord blood creates a biologically related source the family can return to later, reducing dependence on a registry whose donor mix does not reflect the full population.
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Going forward, the market splits in two directions. Public systems are expanding partially matched donor options to reduce the harm from registry imbalance, while companies like Anja Health sell families a way to bypass that search entirely by storing their own cells at birth. Both trends point to the same fact, access improves when the system relies less on finding a perfect stranger.