[Autologous peripheral stem cell transplantation in children]

Area of Science:

• Pediatric Hematology/Oncology
• Stem Cell Transplantation
• Leukapheresis

Context:

• Autologous stem cell transplantation is a critical treatment for pediatric cancers.
• Leukapheresis is used to collect peripheral blood stem cells for rescue after high-dose chemotherapy.
• Challenges exist in optimizing stem cell collection yields in pediatric populations.

Purpose:

• To evaluate the efficacy and tolerability of leukapheresis for blood stem cell collection in pediatric cancer patients.
• To assess the correlation between stem cell yield and post-transplant recovery time.
• To analyze patient outcomes following autologous stem cell transplantation.

Summary:

• 19 children (3-23 years) underwent leukapheresis for stem cell collection.
• Stem cell yields varied significantly based on diagnosis (e.g., ALL, NHL, Ewing's Sarcoma vs. PNET, Neuroblastoma).
• 17 children received high-dose chemoradiotherapy with stem cell rescue; recovery of granulocytes was rapid (median 31 days).
• Survival rates and causes of mortality (relapse, infection) were documented.
• Leukapheresis was well-tolerated, repeatable, and effective in achieving high stem cell yields with optimal timing.

Impact:

• Demonstrates that leukapheresis is a safe and effective method for stem cell collection in pediatric cancer patients.
• Highlights the importance of optimal collection timing for achieving high stem cell yields.
• Suggests that high stem cell yields correlate with shorter durations of post-transplant granulocytopenia, potentially improving patient outcomes.