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Evans Syndrome Treatment & Management

  • Author: Prasad Mathew, MBBS, DCH, FAAP; Chief Editor: Hassan M Yaish, MD  more...
 
Updated: Aug 22, 2016
 

Approach Considerations

Management of Evans syndrome is challenging. Although almost all patients require therapy at some time during the course of the disease, the search for a consistent, effective, and nontoxic therapy continues. Medical therapy is the mainstay of management. Response to therapy varies even within the same individual, and the disease is characterized by periods of remission and exacerbation. No randomized trials have been conducted in patients with Evans syndrome, and the evidence for treatment is based on case reports, case series, and retrospective studies.

Patients admitted for severe anemia or thrombocytopenia should have respiratory and cardiovascular functions stabilized first; should receive blood product transfusions, if needed, after consultation with a pediatric hematologist; and should then be started on therapy with steroids or intravenous (IV) immune globulin (IVIg).

A study by Fan et al indicated that while glucocorticoid therapy is effective against AIHA, patients with Evans syndrome require longer treatment than do those with AIHA alone.[20]

In classic cases (ie, presenting with either autoimmune hemolytic anemia [AIHA] or immune thrombocytopenia), bone marrow aspiration is not indicated. When a patient has pancytopenia at presentation or when the diagnosis of immune thrombocytopenia is unconfirmed, bone marrow examination may help exclude an infiltrative pathology or an aplastic marrow. Bone marrow examination may be indicated in unusual cases, in cases refractory to treatment, or in cases when a peripheral blood smear suggests immature myeloid cells.

Additional therapies include splenectomy, alemtuzumab administration, and hematopoietic stem cell transplantation. Autologous and allogeneic stem cell transplantation have been used in a small number of patients (14 patients aged 5-52 years), with mixed results.[21]

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Pharmacologic Therapy

Prednisone (eg, 1-2 mg/kg divided 2 or 3 times daily) is the most commonly used first-line agent and often effectively controls acute episodes of Evans syndrome. Although some patients are successfully weaned off steroids, relapses may occur when prednisone is tapered or stopped. Accordingly, an alternate-day steroid regimen is advised, if feasible.

Patients with persistent immune cytopenia and those who require prolonged or high doses of steroids may benefit from IVIg (eg, 1-2 g/kg/day for 1-2 days.[22, 23] Their thrombocytopenia is more likely to respond than their hemolysis is. Long-term control of thrombocytopenia is reportedly achieved with interval doses of IVIg.

Other therapies reported to be effective in small series include the following immunomodulating agents[15] :

  • Danazol
  • Cyclosporine [24]
  • Azathioprine
  • Cyclophosphamide
  • Vincristine

In one study,[15] where plasmapheresis was performed in 3 patients, 1 patient had transient responses, at best, to tacrolimus, protein A-Sepharose column plasmapheresis, whole-blood exchange transfusion, and total nodal irradiation. Another patient showed some response to treatment with a combination of Rh D immunoglobulin (anti-D), methotrexate, prednisone, and folic acid (responses to these agents varied).

A newer agent that has been tried in refractory Evans syndrome, with varying results, is rituximab.[25, 26, 27, 28, 29, 30, 31] At present, this agent seems to be used as a second-line therapy. Rituximab is approved for the treatment of relapsed and refractory B-cell non-Hodgkin lymphoma. Its binding to cells expressing CD20 results in cell death via a combination of mechanisms (eg, antibody-dependent cell cytotoxicity, complement activation, and apoptosis). Hence, it has been used to treat various autoimmune disorders mediated by autoantibodies.

Galor et al reported the successful use of rituximab in a patient with Evans syndrome.[25] Mantadakis et al reported the successful use of this agent in a patient with long-lasting Evans syndrome refractory to standard treatments; the patient responded well to rituximab and then responded again when relapse occurred 7 months later.[26] In contrast, Grossi et al treated 2 patients with rituximab without success.[32] In fact, the patients had a worsening of their anemia.

Zecca et al described the weekly use of rituximab in 5 children with Evans syndrome, all of whom were successfully treated.[27] In a retrospective review of patients at the Mayo Clinic, Shanafelt reported responses in one, but not both, of the cytopenias among 3 patients with Evans syndrome.[28]

A review by Norton and Roberts of the use of rituximab in 18 patients (age, 0.3-65 years) yielded encouraging results, with sustained complete remission lasting as long as 17 months.[33] In a pediatric prospective series by Rao et al, 2 patients with Evans syndrome were treated with rituximab; 1 had a partial response, and 1 had no response.[30] Complications associated with rituximab in these studies have been minimal; the most common is infusion-associated reaction.

Another agent that has been tried is alemtuzumab, a humanized immunoglobulin G (IgG) monoclonal antibody specific for the CD52 antigen present on T cells and B cells. Willis et al reported on the use of alemtuzumab in 3 patients with Evans syndrome; though a response was seen in 2 patients, both experienced relapses within 3 months.[34]

One pilot study showed that a multiagent approach may be effective in patients with Evans syndrome.[35] Transfusions of red blood cells (RBCs) and platelets were also used as adjuncts to treatment.

In a multicenter study of 156 children with Evans syndrome, Aladjidi et al found that at least one second-line immune treatment (eg, azathioprine, anti-D, cyclosporine, colchicine, hydroxychloroquine, mycophenolate mofetil, rituximab, thrombopoietin-receptor agonists, splenectomy) was needed in 108 cases (69%).[36]

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Splenectomy

Splenectomy does not have a clearly established role in the treatment of Evans syndrome, but it may be considered in refractory cases. Splenectomy may improve the CBC and reduce steroid dependence; however, relapses are common and, in most cases, occur within 1-2 months after the procedure.

According to a national survey, splenectomy provided a reported duration of response that ranged from 1 week to 5 years; however, the median response duration was just 1 month.[15] The risk of postsplenectomy sepsis appears to be increased in children with Evans syndrome, especially those with pancytopenia.

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Diet and Activity

Dietary restrictions are not usually required. Patients receiving steroid therapy should have some restrictions placed on their salt, sugar, and fluid intake to prevent excessive fluid retention.

Activities may have to be restricted to some extent, depending on patient tolerance and the degree of anemia and bruising.

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Consultations

The following consultations may be considered as appropriate:

  • Pediatric hematologist
  • Pediatric oncologist
  • Rheumatologist
  • Immunologist
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Long-Term Monitoring

A patient may be discharged if he or she is clinically stable (eg, if blood counts are rising). Weekly follow-up is recommended with blood counts and physical examinations until counts become stable or return to reference ranges. Subsequent follow-up care may be arranged at intervals of 2-4 weeks. More frequent follow-up care may be indicated for patients with clinical or laboratory signs of recurrence (eg, when steroids are tapered).

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Contributor Information and Disclosures
Author

Prasad Mathew, MBBS, DCH, FAAP Professor of Pediatrics, Division of Hematology/Oncology, University of New Mexico School of Medicine

Prasad Mathew, MBBS, DCH, FAAP is a member of the following medical societies: American Academy of Pediatrics, American Medical Association, American Society of Hematology, American Society of Pediatric Hematology/Oncology, International Society on Thrombosis and Haemostasis, American Society of Clinical Oncology, National Hemophilia Foundation, Hemophilia and Thrombosis Research Society, International Society of Paediatric Oncology, World Federation of Hemophilia

Disclosure: Received salary from Bayer HC for payment for services rendered.

Chief Editor

Hassan M Yaish, MD Medical Director, Intermountain Hemophilia and Thrombophilia Treatment Center; Professor of Pediatrics, University of Utah School of Medicine; Director of Hematology, Pediatric Hematologist/Oncologist, Department of Pediatrics, Primary Children's Medical Center

Hassan M Yaish, MD is a member of the following medical societies: American Academy of Pediatrics, New York Academy of Sciences, American Medical Association, American Society of Hematology, American Society of Pediatric Hematology/Oncology, Michigan State Medical Society

Disclosure: Nothing to disclose.

References
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