Interstitial del(20)(q11.2q12) - clinical and molecular cytogenetic characterization.
A 2-year-old male patient with dysmorphic facial features and multiple congenital anomalies suggestive of a chromosome syndrome is presented. The facial features consisted of a large and high forehead, mild metopic ridging, a small triangular face, depressed nasal bridge, microphthalmia (right more than the left), protruding ears, and mildly prominent anteverted nose with long and smooth philtrum. Cytogenetic analysis showed 46,XY,del(20)(q11.2q12). Parental karyotypes were normal. Molecular characterization of del(20)(q11.2q12) by high-resolution microarray comparative genomic hybridization (arrayCGH) showed an approximately 6.8 Mb deletion. To our knowledge this is the first report of a de novo interstitial del(20)(q11.2q12) characterized by arrayCGH.
Iqbal
M Anwar
MA
Cytogenetics and Molecular Cytogenetics, Department of Pathology and Laboratory Medicine, Saudi Arabia. Anwar_Iqbal@urmc.rochester.edu
Al-Owain
Mohammad
M
D000015:Abnormalities, Multiple / Q000175:diagnosis* / Q000235:genetics; D002675:Child, Preschool; D002871:Chromosome Banding; D002872:Chromosome Deletion; D002890:Chromosomes, Human, Pair 20; D020732:Cytogenetic Analysis; D005145:Face / Q000002:abnormalities*; D006801:Humans; D007621:Karyotyping; D008297:Male; D009693:Nucleic Acid Hybridization; D020411:Oligonucleotide Array Sequence Analysis / Q000379:methods; D010641:Phenotype