A bone marrow match of 9 points is a high level of match and is relatively unlikely to cause rejection, but there is a risk of rejection. 1. Before bone marrow transplantation, a minimum of 6 points of match is required for bone marrow typing. Bone marrow mating is usually done at a low resolution first, and after there is a 6-point match, then high resolution mating is done. 2. High-resolution matching is generally considered to be ideal when 8 points are matched, but of course, the higher the number of points, the higher the degree of match, and the lower the rejection reaction after transplantation. 10 points of match is called full match, which has the highest success rate of bone marrow transplantation. 3. For bone marrow matching with 9 points of match, it should be considered as a better matching result, and the rejection reaction after transplantation is relatively low. However, even with full compatibility, there is still a risk of graft-versus-host disease after transplantation. Bone marrow transplantation is clinically important for the treatment of many hematologic diseases, such as leukemia, lymphoma, multiple myeloma, myelodysplastic syndromes, myelofibrosis, etc. Bone marrow transplantation can be considered for treatment. Specific treatment needs to be directed by a physician.