Journal Article
Research Support, N.I.H., Extramural
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Long-term clinical outcome of patients with severe combined immunodeficiency who received related donor bone marrow transplants without pretransplant chemotherapy or post-transplant GVHD prophylaxis.

Journal of Pediatrics 2009 December
OBJECTIVE: To determine long-term health benefits of nonablative bone marrow transplantation for severe combined immunodeficiency (SCID), we investigated our cohort of 161 related donor bone marrow-transplanted patients with SCID. Only 16 (10%) had HLA-identical donors.

STUDY DESIGN: All 124 survivors were sent questionnaires about their current clinical statuses. Details from clinic visits were also compiled. One hundred eleven patients (90%) were reached. We compared outcomes of patients transplanted before and after 3.5 months of life and by molecular defect.

RESULTS: The overall survival rate was 77%, but the rate for the 48 infants transplanted in the first 3.5 months of life was 94%, compared with 70% for the 113 transplanted after 3.5 months (P = .002). Twenty-eight (76%) of the 37 deceased patients died of viral infections present at diagnosis. One or more clinical problems were reported to have been present in the past 2 years in 71 (64%) of the survivors, although 95 (86%) were considered healthy by their families.

CONCLUSIONS: Most patients with SCID transplanted with related donor marrow without pretransplant chemotherapy have done well in the long term, but those transplanted at <3.5 months of age had a superior survival rate, a lower rate of clinical problems, less need for booster transplants, and better nutritional status.

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