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Management of leukopenia in kidney and pancreas transplant recipients

Abstract:  Leukopenia is frequently observed in the setting of solid organ transplantation. The risk factors, natural history, and outcomes associated with leukopenia post‐transplantation have not been well defined. We retrospectively studied 102 adult kidney and/or pancreas transplant recipients over a one‐yr period of time. By defining leukopenia as a white blood cell count ≤3000 cells/mm3 and neutropenia as an absolute neutrophil count ≤2000/mm3, the combined incidence of either leukopenia or neutropenia was 58% (59/102); the first episode occurred at a mean of 91 d post‐transplant. A significant increase in the incidence of leukopenia was found in patients who either received alemtuzumab induction (42% with alemtuzumab vs. 9% with rabbit anti‐thymocyte globulin induction, p < 0.05) and/or had rapid steroid withdrawal in the early post‐transplant period (44% with vs. 16% without steroid withdrawal, p < 0.05). The most common intervention performed for leukopenia was reducing the dose of mycophenolate mofetil and/or valganciclovir. When granulocyte stimulating factors were used, a mean of 3.1 doses were needed to successfully manage the leukopenia. Although leukopenia was a common finding in our study of kidney and/or pancreas transplant recipients, there was no difference in the rates of infection or acute rejection in patients with and without leukopenia.