Evolving paradigms in the treatment of adult ALL include the application of intense pediatric regimens to the treatment of adolescents and young adults (AYA) and the optimization of allogeneic hematopoietic stem cell transplantation (allo-HSCT) in the cure of patients. Adult regimens are typically less intense than pediatric regimens. The Cancer and Leukemia Group B (CALGB) and the Children's Cancer Group (CCG) first asked whether AYA between the ages of 16 and 20 fared differently whether they were treated on pediatric protocols. The results of this study demonstrated that although the complete remission rates were identical for the AYAs treated on the CALGB and CCG trials, the AYAs had a 63% event-free survival (EFS) and 67% OS at 7 years on the CCG trials compared with 34% and 46%, respectively, on the CALGB trials. These results have prompted new studies where pediatric ALL regimens have been adapted to the treatment of younger adults. With short follow-up, GRAALL-2003 reports suggest EFS and OS outcomes in the range of 60%. This improved outcome was more pronounced in the standard-risk patients with a donor who had an OS at 5 years of 69%. On the same time, our previous researches have confirmed the effect and safety of FA-intensified conditioning regimen on relapse and refractary leukemia.