European Journal of Dermatology

, Volume 27, Issue 6, pp 641–645 | Cite as

FOXI2: a possible gene contributing to ectodermal dysplasia

  • Mazen Kurban
  • Savo Bou Zeineddine
  • Lamiaa Hamie
  • Remi Safi
  • Ossama Abbas
  • Abdul Ghani Kibbi
  • Fadi Bitar
  • Georges NemerEmail author
Genes and skin



Cardio-facio-cutaneous syndrome (CFC), Noonan syndrome (NS), and Costello syndrome are a group of diseases that belong to the RASopathies. The syndromes share clinical features making diagnosis a challenge.


To investigate the phenotype and genotype of a 10-year-old Iraqi girl with overlapping features of CFC, NS, and Costello syndromes, with additional features of ectodermal dysplasia.

Materials & methods

DNA was examined by exome sequencing and protein expression by immunohistochemistry.


Exome sequencing identified a mutation in the SOS1 gene and a de novo deletion in the FOXI2 gene whichwas neither present in the international databases, nor in 400 chromosomes from the same population. Based on immunohistochemical staining, FOXI2was identified in the basal cell layer of the skin and overlapped with the expression of P63, a major player in ectodermal dysplasia.


We therefore suggest screening for FOXI2 mutation in the setting of ectodermal features that are not associated with genes known to contribute to ectodermal dysplasia.

Key words

cardio-facio-cutaneous syndrome Noonan syndrome RAS SOS1 FOXI2 


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Copyright information

© JLE/Springer 2018

Authors and Affiliations

  • Mazen Kurban
    • 1
    • 2
    • 3
  • Savo Bou Zeineddine
    • 4
  • Lamiaa Hamie
    • 5
  • Remi Safi
    • 1
  • Ossama Abbas
    • 1
  • Abdul Ghani Kibbi
    • 1
  • Fadi Bitar
    • 6
  • Georges Nemer
    • 2
    Email author
  1. 1.Department of DermatologyAmerican University of BeirutBeirutLebanon
  2. 2.Department of Biochemistry and Molecular GeneticsAmerican University of BeirutBeirutLebanon
  3. 3.Department of DermatologyColumbia UniversityNew YorkUSA
  4. 4.American University of BeirutBeirutLebanon
  5. 5.Department of Internal MedicineAmerican University of BeirutBeirutLebanon
  6. 6.Department of PediatricsAmerican University of BeirutBeirutLebanon

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