Transplant-associated Thrombotic Microangiopathy Treated with Eculizumab and Romiplostim.

Transplant-associated thrombotic microangiopathy (TA-TMA) can occur after solid organ transplantation. It results in thrombocytopenia, haemolytic anaemia and microvascular occlusion. TA-TMA is not fully understood and treatment has not been clearly established. However, there is increasing evidence to suggest an immune-complement mediated component to its development. Eculizumab is a monoclonal antibody that inhibits the cleavage of C5 into pro-inflammatory, prothrombotic terminal complement elements and has been utilized in the treatment of atypical haemolytic uremic syndrome. We report a case of TA-TMA successfully treated with eculizumab and romiplostim. This case adds to the evidence that TA-TMA is triggered by complement dysregulation and suggests possible interventions for refractory cases. LEARNING POINTS: Transplant-associated thrombotic microangiopathy (TA-TMA) may occur in solid organ transplant patients.Eculizumab may be used for the treatment of TA-TMA. © EFIM 2021.