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Article Dans Une Revue Prenatal Diagnosis Année : 2015

Severe X-linked chondrodysplasia punctata in nine new female fetuses

Fabienne Dufernez
  • Fonction : Auteur
Judith Saint-Onge
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Julie Desir
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Caroline Daelemans
  • Fonction : Auteur
Raphaele Mangione
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Jean-Marc Labaune
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Dominique d'Olne
  • Fonction : Auteur
Annick Toutain
Luc Rigonnot
  • Fonction : Auteur
Pierre Vabres
Nicole Laurent
  • Fonction : Auteur

Résumé

ObjectivesConradi-Hunermann-Happle [X-linked dominant chondrodysplasia punctata 2 (CDPX2)] syndrome is a rare X-linked dominant skeletal dysplasia usually lethal in men while affected women show wide clinical heterogeneity. Different EBP mutations have been reported. Severe female cases have rarely been reported, with only six antenatal presentations. MethodsTo better characterize the phenotype in female fetuses, we included nine antenatally diagnosed cases of women with EBP mutations. All cases were de novo except for two fetuses with an affected mother and one case of germinal mosaicism. ResultsThe mean age at diagnosis was 22weeks of gestation. The ultrasound features mainly included bone abnormalities: shortening (8/9 cases) and bowing of the long bones (5/9), punctuate epiphysis (7/9) and an irregular aspect of the spine (5/9). Postnatal X-rays and examination showed ichthyosis (8/9) and epiphyseal stippling (9/9), with frequent asymmetric short and bowed long bones. The X-inactivation pattern of the familial case revealed skewed X-inactivation in the mildly symptomatic mother and random X-inactivation in the severe fetal case. Differently affected skin samples of the same fetus revealed different patterns of X-inactivation. ConclusionPrenatal detection of asymmetric shortening and bowing of the long bones and cartilage stippling should raise the possibility of CPDX2 in female fetuses, especially because the majority of such cases involve de novo mutations.

Dates et versions

hal-01376847 , version 1 (05-10-2016)

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Citer

Mathilde Lefebvre, Fabienne Dufernez, Ange-Line Bruel, Marie Gonzales, Bernard Aral, et al.. Severe X-linked chondrodysplasia punctata in nine new female fetuses. Prenatal Diagnosis, 2015, 35 (7), pp.675-684. ⟨10.1002/pd.4591⟩. ⟨hal-01376847⟩
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