Transplantation-mediated alloimmune thrombocytopenia successfully treated by retransplantation

Abstract

Introduction: Transplantation-mediated alloimmune thrombocytopenia (TMAT) is a rare complication affecting the recipient of an organ from a donor with immune thrombocytopenia (ITP).

Methods: We present a case of TMAT following liver transplantation successfully treated by retransplantation, along with a review of previously published cases.Clinical presentation: The liver donor had lupus and ITP and died from an intracranial hemorrhage. The recipient's platelet count fell to 2x10⁹/L on postoperative day 2. Due to the lack of response to medical treatment, emergency retransplantation was undertaken with a steady recovery of the platelet count within a few days.

Discussion: Six additional cases of transplantation-mediated alloimmune thrombocytopenia after liver transplantation have been reported. In all cases, severe thrombocytopenia ensued within 3 days after liver transplantation. Four patients suffered hemorrhagic complications. Three patients died. Early retransplantation was needed in three out of four patients receiving a graft from a donor with ITP and splenectomy. All recovered shortly after the new graft was in place.

Conclusion: Severe refractory transplantation-mediated alloimmune thrombocytopenia can develop in liver recipients from donors with ITP, especially those with previous splenectomy. Early retransplantation should be considered if there is no rapid response to medical therapy.

Keywords: Immune thrombocytopenia; TMAT; liver transplantation; passenger lymphocyte syndrome; transplantation-mediated alloimmune thrombocytopenia.