A rare sex chromosome aneuploidy syndrome, 49,XXXXY syndrome is characterized by mental retardation with severe learning difficulties, craniofacial and skeletal abnormalities, hypogonadism, and congenital heart disease. The authors describe a 30-month-old boy with 49,XXXXY syndrome, global developmental delay and white matter changes in the brain magnetic resonance imaging. They reviewed the literature to delineate a specific magnetic resonance imaging pattern of 49,XXXXY syndrome.
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An infant with 49XXXXY syndrome: a case report.
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Endocrinology and Diabetic Unit, Lady Ridgeway Hospital, Colombo, Sri Lanka.
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Stem Cell Res
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Biological and Environmental Science and Engineering Division, King Abdullah University of Science and Technology, Thuwal 23955-6900, Saudi Arabia. Electronic address:
Klinefelter Syndrome (KS) is the most common aneuploidy in humans (prevalence: 85-250 per 100,000 born males) and is characterized by one or more supernumerary X-chromosomes (47-XXY, 48-XXXY and 49-XXXXY karyotypes). KS is a multisystemic disorder associated to multiple phenotypic features including cardiac abnormalities, infertility, mental retardation, diabetes and increased cancer risk. Using a non-integrative mRNAs reprogramming approach, we generated two iPSC lines 48-XXXY and 49-XXXXY from a non-mosaic 49-XXXXY KS patient carrying a balanced translocation t(4,11) (q35,q23).
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