After bone marrow transplantation for adult acute lymphoblastic leukemia, the prognosis varies in different cases, and it is possible to reach a long-term asymptomatic remission state. 1. No relapse after surgery: For acute lymphoblastic leukemia, some patients have no relapse for life after bone marrow transplantation, i.e., a long-term asymptomatic remission is achieved. 2. Post-operative relapse: acute lymphoblastic leukemia may also relapse in the short term after bone marrow transplantation. In general, the relapse rate is higher within one year after transplantation, and if the relapse or the rejection reaction is severe, the survival should be judged according to the effect of the follow-up treatment. If there is no recurrence five years after transplantation, the probability of recurrence is relatively low. Anti-rejection drugs include cyclosporine and tacrolimus. 3. Rejection or infection may occur after transplantation, which can also be life-threatening in severe cases. After leukemia bone marrow transplantation, you should actively prevent infections and rejection reactions, and carry out follow-up treatment under the guidance of your doctor.