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== History == |
== History == |
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The first published report of an individual with a 48,XXYY karyotype was an [[AMAB]] individual by Sylfest Muldal and Charles H. Ockey in Manchester, England in 1960. It was described in a 15-year-old |
The first published report of an individual with a 48,XXYY karyotype was an [[AMAB]] individual by Sylfest Muldal and Charles H. Ockey in Manchester, England in 1960. It was described in a 15-year-old boy with learning disabilities who showed signs of Klinefelter syndrome; however, chromosome testing revealed 48,XXYY instead of the 47, XXY arrangement known to cause [[Klinefelter Syndrome|Klinefelter syndrome]]. Because of this, 48,XXYY syndrome was originally considered a variation of Klinefelter syndrome. |
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== Flag == |
== Flag == |
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