Systemic Lupus Erythematosus with Refractory Immune Thrombocytopenia Progressing to Catastrophic Anti-Phospholipid Syndrome During Thrombopoietin Receptor Agonist Therapy: A Case Report

<b>Background/Objectives</b>: Autoimmune thrombocytopenia is a common manifestation of systemic lupus erythematosus (SLE). Its main treatments are glucocorticoids, intravenous immunoglobulin, and immunosuppressants, but thrombopoietin mimetics may be considered with refractory to conventional treatment. Romiplostim, a thrombopoietin receptor agonist, has been approved for increasing platelet counts in corticosteroid-refractory chronic immune thrombocytopenia. However, data on its long-term safety and efficacy in patients with SLE are still lacking. <b>Case Presentation</b>: We present the case of a 55-year-old woman with SLE and refractory immune thrombocytopenia who developed bilateral adrenal hemorrhage and progressed to fatal catastrophic anti-phospholipid syndrome while using romiplostim.