Triple X syndrome
47,XXX
Also known as: 47 XXX, trisomy X
47,XXX, sometimes called triple X syndrome, is an extra X chromosome in a female. Many individuals are only mildly affected or have no obvious features.
Open in the interactive visualizer →
What the notation means
47- total chromosome count (normal is 46)
XXX- sex chromosomes: three X
Clinical notes
47,XXX, Triple X
An extra X in a female. Often mild/absent phenotype; tall stature, sometimes learning difficulties. Two Barr bodies.