Trisomy X
Trisomy X
Definition
Trisomy X is a sex chromosome anomaly with a variable phenotype caused by the presence of an extra X chromosome in females (47,XXX instead of 46,XX).
Also known as 47,XXX, 47,XXX syndrome, triple X syndrome, Triplo-X syndrome, trisomy type X, trisomy X, XXX syndrome — per MONDO