1.3 Mb de novo deletion in chromosome band 3q29 associated with normal intelligence in a child.
We report on a 6 and 9/12 year-old male patient with a de novo chromosome 3q29 microdeletion identified by BAC array comparative genomic hybridization assay (aCGH), with accompanying normal 46,XY high-resolution chromosome analysis. The patient has language-based learning disabilities and behavioral features consistent with diagnoses of autism and attention deficit hyperactivity disorder (ADHD) of the inattentive type. He also displays some other features previously associated with chromosome 3q29 microdeletion such as an elongated face, long fingers, and joint laxity. Most notably our patient, per formal IQ testing, was not found to have frank mental retardation as has been previously reported among patients with chromosome 3q29 terminal deletion, but rather our patient has demonstrated an average full-scale IQ result. Our report further expands the phenotypic spectrum of the rare chromosome 3q29 microdeletion syndrome to include the possibility of normal intelligence as corroborated by formal, longitudinal psycho-educational testing.
Cobb
William
W
National Naval Medical Center, Department of Pediatrics, 8901 Wisconsin Avenue, Bethesda, MD 20889-5600, USA.
Anderson
Arne
A
Turner
Clesson
C
Hoffman
Ruth D
RD
Schonberg
Steven
S
Levin
Sondra W
SW
D001289:Attention Deficit Disorder with Hyperactivity / Q000235:genetics; D001321:Autistic Disorder / Q000235:genetics; D002648:Child; D002872:Chromosome Deletion; D002893:Chromosomes, Human, Pair 3 / Q000235:genetics*; D055028:Comparative Genomic Hybridization; D006801:Humans; D017404:In Situ Hybridization, Fluorescence; D007360:Intelligence / Q000235:genetics*; D008297:Male; D010641:Phenotype