Clinical heterogeneity in a family with DKC1 mutation, dyskeratosis congenita and Hoyeraal-Hreidarsson syndrome in first cousins

  • Cristina Olivieri Department of Public and Pediatric Health Sciences, University of Turin, Italy.
  • Anna Mondino Department of Public and Pediatric Health Sciences, University of Turin, Italy.
  • Matteo Chinello Department of Pediatric Hematology and Oncology, Policlinico G.B. Rossi, Verona, Italy.
  • Alessandra Risso Departement of Hematology, City of Health and Science, University of Turin, Italy.
  • Enrico Finale | enrico.finale@gmail.com Unit of Pediatrics, Castelli Hospital, Verbania, Italy. http://orcid.org/0000-0002-0607-1606
  • Marina Lanciotti Department of Pediatric Hematology Oncology and Bone Marrow Transplant, G. Gaslini Children’s Hospital, Genoa, Italy.
  • Andrea Guala Unit of Pediatrics, Castelli Hospital, Verbania, Italy.

Abstract

Dyskeratosis congenita (DC) is an inherited bone marrow failure disorder characterized by mucocutaneous features (skin pigmentation, nail dystrophy and oral leukoplakia), pulmonary fibrosis, hematologic and solid malignancies. Its severe form, recognized as Hoyeraal-Hreidarsson syndrome (HHS), also includes cerebellar hypoplasia, microcephaly, developmental delay and prenatal growth retardation. In literature phenotypic variability among DC patients sharing the same mutation is wellknown. To our knowledge this report describes for the first time a family of DC patients, characterized by a member with features of classic DC and another one with some features of HHS, both with the same mutation in DKC1. Our family confirms again that one mutation can be associated with different phenotypes and different hematological manifestations. It’s possible to speculate that there are likely to be patients who do not clinically fit neatly into either classical DC or HHS, but whose clinical features are due to mutations in DKC1 or in genes responsible for autosomal DC/HHS.

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Published
2017-10-06
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Section
Case Reports & Letters
Keywords:
Dyskeratosis Congenital, Hoyeraal-Hreidarsson Syndrome, gene mutation, phenotypic variability
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How to Cite
Olivieri, C., Mondino, A., Chinello, M., Risso, A., Finale, E., Lanciotti, M., & Guala, A. (2017). Clinical heterogeneity in a family with DKC1 mutation, dyskeratosis congenita and Hoyeraal-Hreidarsson syndrome in first cousins. Pediatric Reports, 9(3). https://doi.org/10.4081/pr.2017.7301