<unk> , also known as 48,XYYY, is a chromosomal disorder in which a male has two extra copies of the Y chromosome. The syndrome is exceptionally rare, with only twelve recorded cases. The phenotype of the syndrome is heterogeneous, but appears to be more severe than its counterpart<unk> . Common traits include borderline to mild intellectual disability, infertility, radioulnar synostosis, and in some cases tall stature.
XYYY syndrome
XYYYY syndrome
XYY syndrome
XXYY syndrome
XX male syndrome
XXXY syndrome
Turner syndrome
Klinefelter syndrome