European Journal of Pediatrics

, Volume 164, Issue 3, pp 146–153 | Cite as

Presenting phenotype in 100 children with the 22q11 deletion syndrome

  • Sólveig Óskarsdóttir
  • Christina Persson
  • Bengt O. Eriksson
  • Anders Fasth
Original Paper

Abstract

The aim of this study was to investigate and describe the presenting phenotype of children with the 22q11 deletion syndrome and to describe common clinical features that could serve as guidelines in the clinical diagnostic process preceding genetic testing. A hospital-based study of 100 consecutive children and adolescents with 22q11 deletion was initiated. The patients were divided into two groups according to age at diagnosis: before or after 2 years of age. Clinical features were grouped into a core set of eight features: cardiac defects, non-visible/hypoplastic thymus or infection problems, hypocalcaemia, feeding difficulties, cleft palate/speech-language impairment, developmental delay/learning difficulties, characteristic dysmorphic features and other malformations and deformities. The median age at diagnosis was 6.7 years. Of all patients, 26% were diagnosed in infancy and 92% had a congenital cardiac defect, whereas 54% of those diagnosed later had a cardiac defect. A cleft palate was present in 25 cases and 44 had some other malformation or deformity. All presented with a combination of many of the core features. Of those diagnosed after 2 years of age, the majority presented with speech-language impairment, developmental delay or learning difficulties and recurrent infections. Characteristic mild dysmorphic features were noticed in all children. Conclusion: In spite of variable clinical expression, children with 22q11 deletion share a number of major features and have a characteristic phenotype. A high proportion have no cardiac defect and hence a risk of diagnostic delay. Increased awareness and knowledge among general paediatricians and other specialists who meet these children early in life is needed to reduce the diagnostic delay.

Keywords

22q11 deletion DiGeorge syndrome Phenotype Practice guidelines Velocardiofacial syndrome 

Abbreviations

22q11DS

22q11 deletion syndrome

FISH

fluorescent in-situ hybridisation

ITP

immune thrombocytopoenia

VCFS

velocardiofacial syndrome

VSD

ventricular septal defect

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Copyright information

© Springer-Verlag 2004

Authors and Affiliations

  • Sólveig Óskarsdóttir
    • 1
  • Christina Persson
    • 2
  • Bengt O. Eriksson
    • 1
  • Anders Fasth
    • 1
  1. 1.Department of PaediatricsThe Queen Silvia Children’s HospitalGöteborg Sweden
  2. 2.Department of Logopaedics and PhoniatricsSahlgrenska Academy, Göteborg UniversityGöteborgSweden

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