Does <i>DKC</i>1 Mutation Suffice to Define the Phenotype Severity of Hoyeraal-Hreidarsson Syndrome?

• 作者: Barbara Lemos-Santana Carlos Alberto Scrideli Elvis Terci Valera Luiz Gonzaga Tone María Sol Brassesco Pérsio Roxo Jr. Rodrigo Tocantins Calado Sabrine Teixeira Ferraz Tom Vulliamy
• 来源期刊: 血液病期刊(英文)
• 学科: 医学
• 关键词: DKC1 MUTATION Dyskeratosis Congenital Hoyeraal-Hreidarsson SYNDROME Bone MARROW Failure
• 年，卷（期）: 2013,（1）
• 页码范围: 57-61
• 页数: 5页
• 分类号: R73

摘要

Both dyskeratosis congenita (DC) and Hoyeraal-Hreidarsson Syndrome (HHS) are rare inherited bone marrow failure conditions. HHS is considered to be a variant of DC in which neurological deficits and immunodeficiencies are also present. We describe a very interesting familial cluster where an invariant point mutation of DKC1 located in the exon 11 is observed in the carrier mother and in two decedent males. The older child developed the classical phenotype of HHS at a very early age. The second affected child remains poorly symptomatic, with only mild haematological changes. Telomere shortening, with different severity, is also present in both cases. This paper discusses the clinical spectrum of inherited BM failure syndromes from the perspective different clinical presentation within a family with a DKC1 mutation.