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• W2626556119 abstract "Abstract Following liver transplantation, patients require immunosuppressive medications to prevent graft rejection. However, these drugs can have significant side effects including severe anemia. Tacrolimus is now commonly used in pediatrics patients after liver transplantation. Case reports indicate that tacrolimus rarely can cause microangiopathic hemolytic anemia and also hemolytic anemia due to cold reactive IgM antibodies (cold agglutinin disease). We have seen 4 patients with symptomatic cold agglutinins thought to have been triggered by tacrolimus. Four patients, 6 to 26 months post-ABO-compatible liver transplant, presented with severe anemia (hemoglobin &lt; 6g/dL), indirect hyperbilirubinemia, reticulocytosis and low serum haptoglobin (Table 1). Peripheral blood smear exhibited marked autoagglutination but no evidence of microangiopathic changes. The direct antiglobulin test (DAT) initially was strongly positive in all 4 patients (Table 2). After warm saline washes, the DAT remained positive for complements in 3 out of 4 patients. Cold agglutinin titers were low (1:4 – 1:16) but thermal amplitude studies were positive at 37°C in the two tested patients. Viral serologies significant for cold agglutinin syndrome were negative. None of the patients had clinical evidence of post-transplant lymphoproliferative disorder. All 4 patients had brisk hemolysis requiring multiple uncrossmatched packed red blood cells (PRBC) transfusions. Favorable resolution of the hemolytic anemia occurred following steroids, plasmapheresis and withdrawal of tacrolimus. Subsequently, patients were placed on cyclosporin and none exhibited liver rejection or recurrence of their hemolytic anemia. The above observation indicates that acute cold-agglutinin induced hemolysis occurs in patients following liver transplantation and these events appear to have temporally associated with tacrolimus administration. Patient Profiles Patient Age Diagnosis Months after transplant Presenting hemoglobin (g/dL) Reticulocyte (%/Abs k/μL Total/Direct Bilirubin Treatments (in addition to withdrawal of tacrolimus) ND=not done. MP=methylprednisolone 1 8 mos Neonatal iron storage disease 6 2.8 41%/469 4.2/0.6 MP 4mg/kg/d plus&#x2028; 30mg/kg/d x 3 days.&#x2028; Plasmapheresis x 6. 2 13 mos Biliary atresia Idiopathic 6 5.3 8%/250 3.2/0.4 MP 4mg/kg/d.&#x2028; Plasmapheresis x 15. 3 2 yrs 5 mos fulminant hepatic failure 14 4.6 19.5%/237 2.6/0.3 MP 10mg/kg/d.&#x2028; Plasmapheresis x 10. 4 4 yrs Biliary atresia 26 5.3 5%/ND 8.8/0.5 MP 2mg/kg/d→ 4mg/kg/d.&#x2028; Plasmapheresis x 10. Immunohematology Profiles Admission DAT Patient 1 Patient 2 Patient 3 Patient 4 Admission DAT Pre/post saline wash Pre/post saline wash Pre/post saline wash Pre/post saline wash DAT-Direct antiglobulin test, M-microscopically, NT-not tested, +-positive, 0-negative, Polyspecific 3+/0 1+/M+ 4+/4+ 3+/1+ Anti-IgG 2+/0 M+/0 4+/1+ 3+/1+ Anti-C3 2+/0 2+/1+ 4+/4+ 3+/1+ Saline Control 2+/0 1+/0 1+/0 1+/0 Eluate 0 NT Panreactive 1+ Panreactive 1+ Cold agglutinin titer at 4°C in saline NT 4 8 16 Thermal amplitude screen at 30°C NT NT Reactive Reactive Donath-Landsteiner Test NT NT Negative Negative Admission peripheral blood smear 4+ polychromatophilia. 4+ microcytosis 4+ autoagglutination. 3+ polychromatophilia. 3+ spherocytes. 3+ microcytes 3+ autoagglutination. 3+ polychromatophilia. 3+ spherocytes. 2+ macrocytes 4+ autoagglutination. 4+ spherocytes. 2+ polychromatophilia. 2+ macrocytes" @default.
• W2626556119 created "2017-06-23" @default.
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• W2626556119 date "2006-11-16" @default.
• W2626556119 modified "2023-09-30" @default.
• W2626556119 title "Cold Agglutinin Syndrome in Post-Liver Transplant Patients on Tacrolimus." @default.
• W2626556119 doi "https://doi.org/10.1182/blood.v108.11.967.967" @default.
• W2626556119 hasPublicationYear "2006" @default.
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