Molecular characterization of a patient with 3p deletion syndrome and a review of the literature.
3p deletion syndrome is a rare disorder involving developmental delay, dysmorphic physical features, and growth retardation. Molecular mapping of several cases in the literature have identified a critical region on chromosome 3p26. We present a child patient with characteristic features of 3p deletion syndrome and a de novo unbalanced translocation involving chromosomes 3 and 13. Fine mapping of this rearrangement using fluorescence in situ hybridization (FISH) and array-based comparative genomic hybridization (aCGH) revealed an unbalanced abnormality including a 4.5 Mb terminal deletion of chromosome 3p, telomeric to ITPR1 on 3p26.2, which was not previously identified with routine cytogenetic analysis. In addition, these investigations confirmed and refined the boundaries of a 26.5 Mb deletion of chromosome 13. This study confirms the minimal candidate region for 3p deletion syndrome, provides further evidence implicating haploinsufficiency of CNTN4 in the disorder, and demonstrates the utility of high-resolution investigations of rare chromosomal rearrangements.
Yale Child Study Center, Yale University School of Medicine, New Haven, Connecticut 06520-7900, USA. thomas.fernandez@yale.edu
Thomas V
TV
Fernandez
I J
IJ
García-González
Christopher E
CE
Mason
G
G
Hernández-Zaragoza
V C
VC
Ledezma-Rodríguez
V M
VM
Anguiano-Alvarez
R
R
E'Vega
M
M
Gutiérrez-Angulo
M L
ML
Maya
H E
HE
García-Bejarano
M
M
González-Cruz
S
S
Barrios
R
R
Atorga
M G
MG
López-Cardona
J
J
Armendariz-Borunda
Matthew W
MW
State
Nory O
NO
Dávalos
D002675:Child, Preschool; D002872:Chromosome Deletion; D025063:Chromosome Disorders / Q000235:genetics* / Q000473:pathology; D002882:Chromosomes, Human, Pair 13 / Q000235:genetics; D002893:Chromosomes, Human, Pair 3 / Q000235:genetics*; D055028:Comparative Genomic Hybridization; D019465:Craniofacial Abnormalities / Q000235:genetics; D002658:Developmental Disabilities / Q000235:genetics; D005260:Female; D006801:Humans; D017404:In Situ Hybridization, Fluorescence; D007621:Karyotyping; D017880:Limb Deformities, Congenital / Q000235:genetics; D008297:Male; D010641:Phenotype; D013577:Syndrome; D014178:Translocation, Genetic