Evans syndrome

Evans syndrome is a rare autoimmune disorder characterized by the simultaneous or sequential occurrence of autoimmune hemolytic anemia (AIHA) and immune thrombocytopenia (ITP), with or without autoimmune neutropenia. In this condition, the immune system mistakenly produces antibodies that attack the body's own red blood cells, platelets, and sometimes white blood cells (neutrophils). The destruction of red blood cells leads to anemia, causing fatigue, pallor, jaundice, and dark urine, while the destruction of platelets results in thrombocytopenia, leading to easy bruising, petechiae (small red spots on the skin), and an increased risk of bleeding. When neutropenia is present, patients are more susceptible to infections. Evans syndrome can occur as a primary (idiopathic) condition or secondary to other disorders, including systemic lupus erythematosus (SLE), common variable immunodeficiency (CVID), autoimmune lymphoproliferative syndrome (ALPS), and other autoimmune or lymphoproliferative diseases. In children, an underlying immune dysregulation disorder should be carefully investigated. The disease follows a chronic relapsing and remitting course, and episodes of cytopenia can be severe and life-threatening. Treatment of Evans syndrome is challenging and often requires a multidisciplinary approach. First-line therapy typically includes corticosteroids and intravenous immunoglobulin (IVIG). For refractory cases, second-line treatments may include rituximab (an anti-CD20 monoclonal antibody), mycophenolate mofetil, cyclosporine, or other immunosuppressive agents. Splenectomy was historically performed but is now used less frequently due to variable long-term efficacy and infection risk. In severe, refractory cases, hematopoietic stem cell transplantation may be considered. Supportive care, including blood transfusions and infection prophylaxis, is an important component of management. Long-term follow-up is essential due to the chronic and unpredictable nature of the disease.

Data sourced from FDA regulatory filings and ClinicalTrials.gov. Updated periodically.

Common questions about Evans syndrome