Feb 9, 2010

Array comparative genomic hybridization as a diagnostic tool for syndromic heart defects

The Journal of Pediatrics
Jeroen BreckpotKoenraad Devriendt

Abstract

To investigate different aspects of the introduction of array comparative genomic hybridization (aCGH) in clinical practice. A total 150 patients with a syndromic congenital heart defect (CHD) of unknown cause were analyzed with aCGH at 1-Mb resolution. Twenty-nine of these patients, with normal results on 1Mb aCGH, underwent re-analysis with 244-K oligo-microarray. With a logistic regression model, we assessed the predictive value of patient characteristics for causal imbalance detection. On the basis of our earlier experience and the literature, we constructed an algorithm to evaluate the causality of copy number variants. With 1-Mb aCGH, we detected 43 structural variants not listed as clinically neutral polymorphisms, 26 of which were considered to be causal. A systematic comparison of the clinical features of these 26 patients to the remaining 124 patients revealed dysmorphism as the only feature with a significant predictive value for reaching a diagnosis with 1-Mb aCGH. With higher resolution analysis in 29 patients, 75 variants not listed as clinically neutral polymorphisms were detected, 2 of which were considered to be causal. Molecular karyotyping yields an etiological diagnosis in at least 18% of patients with a syn...Continue Reading

  • References30
  • Citations41

References

  • References30
  • Citations41

Citations

Mentioned in this Paper

Fluorescent in Situ Hybridization
Body Dysmorphic Disorders
Imbalance
Genome
Array-Based Comparative Genomic Hybridization
Congenital Heart Disease
Gene Deletion Abnormality
Polymerase Chain Reaction Analysis
Etiology
Congenital Heart Defects

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