Molecular cytogenetic analysis of a de novo interstitial deletion of 5q23.3q31.2 and its phenotypic consequences.
We report a 2(3/12)-year-old boy with a constitutional interstitial deletion of 5q,46,XY,del(5)(q23.3q31.2) de novo. Clinical manifestations in this patient included failure to thrive, psychomotor retardation, mild facial dysmorphic features, and long and slender fingers and toes. The precise location and extent (9.5 Mb) of the deletion was determined by fluorescence in situ hybridization (FISH) using 19 YAC and BAC clones. Comparison of the present patient with six other patients with deletions of chromosomal bands 5q22-5q31 allowed further delineation of a constitutional del5q22q31 syndrome. The main features of this syndrome are psychomotor retardation, failure to thrive, hypotonia, hypoplastic muscles, cleft or high arched palate, low-set and dysplastic ears, flat nasal bridge, downslanting palpebral fissures, hypertelorism, anteverted nostrils, and micro- and/or retrognathia.
Max Planck Institute for Molecular Genetics, Berlin, Germany. tzschach@molgen.mpg.de
Andreas
A
Tzschach
Ines
I
Krause-Plonka
Corinna
C
Menzel
Vera
V
Kalscheuer
Holger
H
Toennies
Harry
H
Scherthan
Andreas
A
Knoblauch
Michael
M
Radke
Hans-Hilger
HH
Ropers
Maria
M
Hoeltzenbein
D000015:Abnormalities, Multiple / Q000235:genetics* / Q000473:pathology; D002675:Child, Preschool; D002871:Chromosome Banding; D002872:Chromosome Deletion; D002895:Chromosomes, Human, Pair 5 / Q000235:genetics*; D002658:Developmental Disabilities / Q000473:pathology; D004423:Ear / Q000002:abnormalities; D005145:Face / Q000002:abnormalities; D005183:Failure to Thrive / Q000473:pathology; D019959:Feeding and Eating Disorders of Childhood / Q000473:pathology; D006801:Humans; D017404:In Situ Hybridization, Fluorescence; D007621:Karyotyping; D008297:Male; D010641:Phenotype