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  • Title: Microdeletion at 4q21.3 is associated with intellectual disability, dysmorphic facies, hypotonia, and short stature.
    Author: Dukes-Rimsky L, Guzauskas GF, Holden KR, Griggs R, Ladd S, Montoya Mdel C, DuPont BR, Srivastava AK.
    Journal: Am J Med Genet A; 2011 Sep; 155A(9):2146-53. PubMed ID: 21834054.
    Abstract:
    Chromosomal imbalances are a major cause of intellectual disability (ID) and multiple congenital anomalies. We have clinically and molecularly characterized two patients with chromosome translocations and ID. Using whole genome array CGH analysis, we identified a microdeletion involving 4q21.3, unrelated to the translocations in both patients. We confirmed the 4q21.3 microdeletions using fluorescence in situ hybridization and quantitative genomic PCR. The corresponding deletion boundaries in the patients were further mapped and compared to previously reported 4q21 deletions and the associated clinical features. We determined a common region of deletion overlap that appears unique to ID, short stature, hypotonia, and dysmorphic facial features.
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