Abstract
The duration of neutropenia (absolute neutrophil count (ANC) ⩽100/μl) identifies cancer patients at risk for infection. A test that precedes ANC⩾100/μl would be of clinical value. The immature reticulocyte fraction (IRF) reflects erythroid engraftment and hence a recovering marrow. We evaluated the IRF as predictor of marrow recovery among 90 myeloma patients undergoing their first and second (75 patients) melphalan-based autologous stem cell transplantation (Mel-ASCT). The time to IRF doubling (IRF-D) preceded ANC⩾100/μl in 99% of patients after the first Mel-ASCT by (mean±s.d.) 4.23±1.96 days and in 97% of the patients after the second Mel-ASCT by 4.11±1.95 days. We validated these findings in a group of 117 myeloma patients and 99 patients with various disorders undergoing ASCT with different conditioning regimens. We also compared the time to hypophosphatemia and to absolute monocyte count⩾100/μl to the time to ANC⩾100/μl. These markers were reached prior to this ANC end point in 55 and 25% of patients but were almost always preceded by IRF-D. We conclude that the IRF-D is a simple, inexpensive and widely available test that can predict marrow recovery several days before ANC⩾100/μl.
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Preliminary results of this manuscript have been presented in abstract form at the 43rd Annual meeting of the Infectious Disease Society of America. San Francisco, October 6–9, 2005
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Grazziutti, M., Dong, L., Miceli, M. et al. Recovery from neutropenia can be predicted by the immature reticulocyte fraction several days before neutrophil recovery in autologous stem cell transplant recipients. Bone Marrow Transplant 37, 403–409 (2006). https://doi.org/10.1038/sj.bmt.1705251
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DOI: https://doi.org/10.1038/sj.bmt.1705251