Abstract
Delayed donor red blood cell chimerism (DRCC), pure red blood cell aplasia (PRCA), and autoimmune hemolytic anemia (AIHA) are poorly documented complications after hematopoietic cell transplantation (HCT). The clinical variable "prolonged isolated red blood cell transfusion requirement" (PRTR) was evaluated as a trigger for an extended diagnostic workup. PRTR was defined as the need for red blood cell (RBC) transfusions beyond Day 60 after HCT. We analyzed 487 patients transplanted between 2000 and 2006. Median age was 37 years (range, 0-70 years). Peripheral blood stem cells (n = 344), marrow (n = 138), and cord blood (n = 5) from 278 unrelated and 209 family donors were used. Univariate analysis identified age (incidence of 18.3% among elderly patients, 10.5% in adults, and 2.0% among children [p = 0.002]), ABO incompatibility (16.4% after major incompatible, 2.9% after minor incompatible, and 9.4% after ABO-compatible transplantations [p = 0.003]), conditioning (15.2% after reduced-intensity regimens vs. 7.3% after myeloablative conditioning; p = 0.006), donor type (13.2% after HLA-matched unrelated, 13.6% after mismatched unrelated, 5.7% after matched related, and 0.0% after mismatched related grafts; p = 0.026), and acute ...Continue Reading
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