XXXX syndrome

Tetrasomy X (also called XXXX syndrome, quadruple X, or 48,XXXX) is an extremely rare chromosomal disorder caused by the presence of four X chromosomes instead of two X chromosomes.This condition occurs only in females, as there are no Y chromosomes present that could trigger male development. Tetrasomy X was first described in 1961, and since then approximately 100 cases have been reported worldwide. [Source: Wikipedia ]

Synonyms
48,XXXX syndrome
Quadruple X
Tetra X
Tetrasomy X
May Cause
Clinodactyly of fifth finger
Humerus-radius-ulna synostosis
48,XXXX syndrome
Quadruple X
Tetra X
Tetrasomy X