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Br J Haematol. 2002 Dec;119(3):765-8.

A novel DKC1 mutation, severe combined immunodeficiency (T+B-NK- SCID) and bone marrow transplantation in an infant with Hoyeraal-Hreidarsson syndrome.

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Bone Marrow Transplant Unit, Ospedale Microcitemico, Cagliari, Italy.


X-linked Hoyeraal-Hreidarsson syndrome (XL-HHS) is the severe infantile variant of X-linked dyskeratosis congenita (XL-DC) and both are due to mutations in the DKC1 gene within Xq28. We report a novel missense mutation in DKC1 exon 3 (T113-->C, Ile38Thr) in a Sardinian infant with XL-HHS in whom the disease was characterized by 'T+B-NK-' severe combined immunodeficiency and bone marrow failure. He underwent sibling bone marrow transplantation using a conditioning regimen (fludarabine, rabbit antithymocyte globulin, low-dose melphalan) selected according to the HHS/DC phenotype. This was associated with low toxicity, prompt engraftment with adequate immune reconstitution and full donor haemopoiesis.

[Indexed for MEDLINE]

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