22q11.2 deletions in a series of patients with non-selective congenital heart defects: incidence, type of defects and parental origin

Fokstuen S., Arbenz U., Artan S., Dutly F., Bauersfeld U., Brecevic L., ...More

CLINICAL GENETICS, vol.53, no.1, pp.63-69, 1998 (SCI-Expanded) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 53 Issue: 1
  • Publication Date: 1998
  • Doi Number: 10.1034/j.1399-0004.1998.531530113.x
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.63-69
  • Keywords: congenital heart defects, conotruncal anomaly face syndrome, DiGeorge syndrome, microdeletion 22q11.2, parental origin, velo, cardiofacial syndrome, CHROMOSOMAL REGION 22Q11, CARDIO-FACIAL SYNDROME, ANOMALY FACE SYNDROME, DIGEORGE-SYNDROME, MATERNAL ORIGIN, MICRODELETIONS, MALFORMATIONS, FREQUENCY, TETRALOGY, DISEASE
  • Eskisehir Osmangazi University Affiliated: Yes


Previous studies have indicated a wide spectrum of incidences of 22q11.2 deletions in isolated and syndromic (sporadic or familial) cases of conotruncal heart defects, whereby the detection rate of the deletion varied from 65% in one study to 0 in another. We analysed 110 patients with non-selective syndromic or isolated non-familial congenital heart malformations by fluorescence in situ hybridization (FISH) using the D22S75 DiGeorge chromosome (DGS) region probe. A 22q11.2 microdeletion has been detected in 9/51 (17.6%) syndromic patients. Five were of maternal origin and four of paternal origin. None of the 59 patients with isolated congenital cardiac defect had a 22q11.2 deletion. We compared the cardiac anomalies of our patients with a 22q11.2 deletion with those of previously published series and we describe types of congenital heart defects which appear to be often associated with a 22q11.2 deletion. The ability to detect such types of heart defects and to provide an early diagnosis of 22q11.2 deletion is particularly relevant in very young infants, who often show only very mild expression of the otherwise well-characterized phenotypes of the DiGeorge/velo-cardio-facial syndrome (DG/VCFS).