Fiche publication
Date publication
janvier 2012
Auteurs
Membres identifiés du Cancéropôle Est :
Pr CALLIER Patrick
,
Pr VABRES Pierre
Tous les auteurs :
Piard J, Holder-Espinasse M, Aral B, Gigot N, Rio M, Tardieu M, Puzenat E, Goldenberg A, Toutain A, Franques J, MacDermot K, Bessis D, Boute O, Callier P, Gueneau L, Huet F, Vabres P, Catteau B, Faivre L, Thauvin-Robinet C
Lien Pubmed
Résumé
Poikiloderma occurs in a number of hereditary syndromes, the best known of which is Rothmund-Thomson syndrome (RTS). Differential diagnoses include Dyskeratosis Congenita (DC) with high genetic heterogeneity and Clericuzio-type Poikiloderma with Neutropenia (CPN) due to mutations in the C16orf57 gene. Mutations in the RECQL4 gene are only observed in two thirds of RTS patients. In this study, 10 patients referred for syndromic poikiloderma and negative for RECQL4 sequencing analysis were investigated for C16orf57 mutations. Two C16orf57 heterozygous nonsense mutations (p.W81X and p.Y89X) were identified in a 5-year-old female child presenting with generalized poikiloderma, dental dysplasia, gingivitis, nail dystrophy, palmoplantar keratoderma and pachyonychia of the great toenails. Previously undetected and silent neutropenia was evidenced after C16orf57 molecular analysis. Neutropenia was absent in the C16orf57-negative patients. This report confirms that neutrophil count should be performed in all patients with poikiloderma to target the C16orf57 gene sequencing analysis, prior to RECQL4 analysis.
Référence
Eur J Med Genet. 2012 Jan;55(1):8-11
