Once we identify there is need for Bone marrow transplant, we will perform a Blood test called HLA testing on patient and look for similar HLA type or close match from the donor.If there are siblings they are tested as 1 out of every four siblings will be a full match. If no siblings we check on the bone marrow donor registry database to identify suitable match. If no suitable donor available then we would recommend half match transplant from parent/children/half match sibling.