XXXXY syndrome
Chromosomal anomaly / From Wikipedia, the free encyclopedia
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49,XXXXY syndrome is an extremely rare aneuploidic sex chromosomal abnormality. It occurs in approximately 1 out of 85,000 to 100,000 males.[1][2][3] This syndrome is the result of maternal non-disjunction during both meiosis I and II.[4] It was first diagnosed in 1960 and was coined Fraccaro syndrome after the researcher.[2]
Quick Facts 49,XXXXY syndrome, Other names ...
49,XXXXY syndrome | |
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Other names | Fraccaro syndrome |
A 19-year-old man with XXXXY syndrome and prognathism | |
Specialty | Medical genetics |
Usual onset | Prenatal |
Duration | Lifelong |
Causes | Cellular nondisjunction during meiosis |
Diagnostic method | Karyotype |
Frequency | 1 in 85,000 to 100,000 |
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