Primary treatment of acquired aplastic anemia: outcomes with bone marrow transplantation and immunosuppressive therapy. Seattle Bone Marrow Transplant Team

K Doney, W Leisenring, R Storb, F R Appelbaum
Annals of Internal Medicine 1997 January 15, 126 (2): 107-15

BACKGROUND: Both immunosuppressive therapy and bone marrow transplantation are accepted treatments for patients with aplastic anemia. Choosing one of these therapies for a given patient depends not only on donor availability but also on such factors as patient age.

OBJECTIVE: To compare survival rates and long-term complications after bone marrow transplantation or immunosuppressive therapy in patients with acquired aplastic anemia and to identify prognostic factors associated with improved survival.

DESIGN: Center-based, retrospective analysis.

SETTING: Referral center for patients with aplastic anemia.

PATIENTS: 395 patients with acquired aplastic anemia.

INTERVENTION: Bone marrow transplant from an HLA-identical, related donor or immunosuppressive therapy.

MEASUREMENTS: Kaplan-Meier survival curves, results of log rank tests, and cumulative incidence curves.

RESULTS: Of 168 bone marrow transplant recipients, 89% had sustained engraftment. Forty-six patients developed grade II to IV acute graft-versus-host disease, and 68 developed chronic graft-versus-host disease that required therapy. Of 227 patients who received immunosuppressive therapy, 44% achieved a complete, partial, or minimal response. Fifty-four percent died or had no response to therapy. Actuarial survival at 15 years was 69% for bone marrow transplant recipients and 38% for patients receiving immunosuppressive therapy (P < 0.001). Improved survival was associated with having bone marrow transplantation as primary therapy, being younger, having no transfusion before transplantation, and having a higher absolute neutrophil count. Disease duration, year of therapy, sex, refractoriness to platelet transfusions, and previous treatment with androgens or corticosteroids did not significantly affect survival.

CONCLUSIONS: Data from this center suggest that bone marrow transplantation may be preferred for younger patients with acquired aplastic anemia who have matched, related donors. Long-term survival is excellent for patients who respond to either form of therapy.

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