A bone marrow or stem cell transplant gives a patient great hope, if, there is a good match found. There is a 25% chance that a sibling is a match. The larger the family the greater the odds. However, Lucas' case is much more rare. His newborn brother was found not to be a match.
His dad is of Jamaican descent and his mother is of Portuguese descent. That makes finding a match more difficult because the best chances of finding a stem cell donor is within your own ethnic group.
It's a long shot but if there is anyone out there with a similar ethnicity, contact OneMatch (1-888-236-6283), a stem cell and bone marrow donor registry.

Most of the people on Canada's stem cell and bone marrow registry, OneMatch, are Caucasian; a full 83 per cent. Only 0.5 per cent are black. And only 0.13 per cent are multi-ethnic.