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The 48, XXYY syndrome

  • Charles E. Parker
    Correspondence
    Requests for reprints should be addressed to Dr. Charles E. Parker, Children's Hospital of Los Angeles, 4650 Sunset Boulevard, Los Angeles, California 90027.
    Affiliations
    From the Divisions of Child Development and Metabolism of the Childrens Hospital of Los Angeles, 4650 Sunset Boulevard, Los Angeles, California 90027, USA

    the Department of Pediatrics of the University of Southern California School of Medicine, USA
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  • Jamshed Mavalwala
    Affiliations
    the Department of Pediatrics of the University of Southern California School of Medicine, USA

    Department of Anthropology, University of California at Santa Barbara, USA
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  • John Melnyk
    Affiliations
    From the Divisions of Child Development and Metabolism of the Childrens Hospital of Los Angeles, 4650 Sunset Boulevard, Los Angeles, California 90027, USA

    the Department of Pediatrics of the University of Southern California School of Medicine, USA
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  • Charles H. Fish
    Affiliations
    the Department of Pediatrics of the University of Southern California School of Medicine, USA

    Fairview State Hospital, Department of Mental Hygiene, State of California, Fairview, California, USA
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      This paper is only available as a PDF. To read, Please Download here.
      A nineteen year old Caucasian man with the 48, XXYY syndrome is described. The syndrome is discussed, and it is pointed out that this chromosome constitution should be classed as a separate entity since there are physical, dermatoglyphic and mental differences from Klinefelter's 47, XXY syndrome.
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