Abstract
We describe the treatment of a 10-year-old girl with autosomal recessive Dyskeratosis congenita (DC), neutropenia, thrombocytopenia and combined immunodeficiency by nonmyeloablative hematopoietic stem cell transplantation. The conditioning regimen consisted of fludarabine 30 mg/m(2)/day (days -5, -4, -3) and 2 Gy TBI (0.07 Gy/min; day 0). For graft-versus-host disease (GVHD) prophylaxis a course of intravenous MMF and CSA was administered. At 2 years after transplantation of granulocyte colony-stimulating factor (G-CSF) mobilized peripheral blood stem cells from a healthy 11-year-old HLA-identical brother, peripheral blood counts and T- and B-cell functions have completely normalized and donor chimerism was 100% in all cell lineages. No GVHD occurred. Neurological examination and lung function remained normal. The current transplantation regimen appears suitable, safe and efficacious in patients with DC.
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