Two cases of clump formation after thawing of hematopoietic progenitor cell products for transplantation

Authors

DOI:

https://doi.org/10.46765/2675-374X.2025v6n1e257

Keywords:

Hematopoietic Progenitor Cells, Cryopreservation, Cell Aggregation

Abstract

While rare, clump formation has been described in the thawing of cryopreserved hematopoietic progenitor cell products intended for transplantation. When this occurs, it presents a significant challenge to the transplant team, potentially influencing the viability and safety of the product. Though the exact cause of clumping in thawed products remains unknown, studies have linked clump formation with the occurrence of adverse events. This report aimed to describe two cases of clump formation in thawed apheresis products observed in our processing laboratory, detailing the procedures followed and the outcomes achieved.

References

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Siegenthaler MA, Vu DH, Ebnöther M, Ketterer N, Luthi F, Schmid P, Bargetzi M, Gasparini D, Tissot JD. ‘Agglutination and flocculation’ of stem cells collected by apheresis due to cryofibrinogen. Bone Marrow Transplant. 2004;33(7):765-7. https://doi.org/10.1038/sj.bmt.1704420

Mandanas RA, Kratochvil K, Garner T, Selby GB. Formation of fibrin clots in cryopreserved stem cell bags during thawing procedure: lack of impact on engraftment in autologous stem cell transplantation. Bone Marrow Transplant. 1999;23(3):303-4. https://doi.org/10.1038/sj.bmt.1701553

Reich-Slotky R, Patel N, Dael S, Semidei-Pomales M, Stephens H, Reich M, Schwartz J. Postthaw clotting of peripheral blood stem cell products due to insufficient anticoagulant. J Clin Apher. 2009;24(6):265-8. https://doi.org/10.1002/jca.20220

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Published

07/23/2025

How to Cite

Gamba, C., Silvestri , M. del R. ., Miguel, A., Labonia, D., Fernández Escobar, N., Pizzi , S. M., … Kuperman, S. L. (2025). Two cases of clump formation after thawing of hematopoietic progenitor cell products for transplantation. JOURNAL OF BONE MARROW TRANSPLANTATION AND CELLULAR THERAPY, 6(1). https://doi.org/10.46765/2675-374X.2025v6n1e257

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