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XXXY Syndrome

Known as: 48, XXXY Syndrome 
A rare sex chromosome abnormality in which a male child has 2 extra X chromosomes.
National Institutes of Health

Papers overview

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2011
2011
Parental origin of the extra chromosomes in a case of XXXY syndrome
Objective:To investigate the origin of an abnormal karyotype 48,XXXY and discuss the pathogenesis.Methods:Two polymorphic loci… 
1970
1970
Cytogenetic analysis of a boy with the XXXY syndrome: origin of the X-chromosomes.
A 3-year-old boy with radio-ulnar synostosis and mild mental retardation was found to have a 48/XXXY chromosome constitution in… 
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