It’s ultimately up to a patient’s doctor to decide whether they need stem cells collected from the bloodstream or from the bone marrow. Their decision is based on what’s best for the patient.

If you came up as a match and then decided you didn’t want to go ahead, it could have serious consequences if the patient has already started their preparation treatment for a transplant. That’s why we ask you to be comfortable with both methods, and as fully committed to donating as possible when you sign up.