What is the most appropriate source for hematopoietic stem cell transplantation? Peripheral stem cell/bone...

Area of Science:

• Hematology
• Transplantation Medicine
• Oncology

Background:

• Hematopoietic stem cell transplantation (HSCT) practices have evolved with the introduction of peripheral stem cells (PSC) and cord blood (CB) as alternatives to bone marrow (BM).
• Data from 1997-2006 show a shift in HSCT stem cell sources, with decreased BM use and increased PSC and CB utilization, particularly in patients under 20.
• For adult HSCT recipients (>20 years), PSC is the predominant source (70%), followed by BM, while CB use remains limited.

Purpose of the Study:

• To analyze trends in stem cell source selection for HSCT based on patient age and primary disease.
• To highlight current knowledge and data regarding the choice between CB, PSC, and BM for HSCT.
• To address the lack of prospective randomized studies guiding stem cell source selection in HSCT.

Main Methods:

• Retrospective analysis of CIBMTR data for HSCT procedures between 1997 and 2006.
• Comparison of stem cell source utilization (BM, PSC, CB) across different age groups (pediatric vs. adult).
• Review of factors influencing stem cell source selection, including disease, stage, age, urgency, HLA match, stem cell quantity, and center experience.

Main Results:

• Significant decrease in BM use and increase in PSC and CB use for HSCT in patients under 20.
• PSC is the primary stem cell source for adults (>20 years), accounting for 70% of procedures, with BM as the second choice.
• CB utilization is minimal in the adult HSCT population.

Conclusions:

• The choice of stem cell source (BM, PSC, CB) for HSCT is multifactorial, influenced by patient age, disease, and logistical factors.
• Current trends indicate a move away from BM towards PSC and CB, especially in pediatric HSCT.
• Further research, including prospective randomized trials, is needed to optimize stem cell source selection for diverse patient populations undergoing HSCT.