Framework for Optimizing, Refining, and Unifying Management of HSCT in Pediatric ALL

Plain-language summary

Current therapeutic strategies for high-risk or relapsed ALL patients often involve intensive treatments, including allogeneic hematopoietic stem cell transplantation (HSCT). HSCT remains a cornerstone of therapy, offering curative potential; however, it is associated with considerable risks, including non-relapse mortality (NRM), significant morbidity, and long-term complications that continue to be major concerns. In response to these challenges, the FORUM consortium has made substantial progress in improving outcomes for children with ALL undergoing HSCT. The consortium focuses on reducing life-threatening and lifelong complications, ultimately aiming to enhance quality of life for these high-risk patients. Building on the robust evidence generated by FORUM1, the FORUM2 study has been designed to further optimize the role of HSCT in ALL across all age groups and donor settings within a harmonized and internationally coordinated framework. The FORUM2 study introduces a master protocol structure that encompasses multiple hypothesis-driven substudies, each addressing a specific determinant of HSCT outcomes. This design enables simultaneous or sequential evaluation of novel strategies while ensuring uniform governance, endpoint definitions, and data-quality standards. The overarching objective is to refine the role of HSCT in ALL by reducing treatment-related toxicity while preserving the essential graft-versus-leukemia effect.

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